diff --git a/LICENSE b/LICENSE
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--- a/LICENSE
+++ /dev/null
@@ -1,674 +0,0 @@
- GNU GENERAL PUBLIC LICENSE
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-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
- END OF TERMS AND CONDITIONS
-
- How to Apply These Terms to Your New Programs
-
- If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
- To do so, attach the following notices to the program. It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-
- Copyright (C)
-
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see .
-
-Also add information on how to contact you by electronic and paper mail.
-
- If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
- Copyright (C)
- This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
- This is free software, and you are welcome to redistribute it
- under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License. Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
- You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-.
-
- The GNU General Public License does not permit incorporating your program
-into proprietary programs. If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library. If this is what you want to do, use the GNU Lesser General
-Public License instead of this License. But first, please read
-.
diff --git a/rlp/LICENSE-APACHE2 b/LICENSE-APACHE2
similarity index 100%
rename from rlp/LICENSE-APACHE2
rename to LICENSE-APACHE2
diff --git a/rlp/LICENSE-MIT b/LICENSE-MIT
similarity index 95%
rename from rlp/LICENSE-MIT
rename to LICENSE-MIT
index cd8fdd2b9..b2d52b66d 100644
--- a/rlp/LICENSE-MIT
+++ b/LICENSE-MIT
@@ -1,4 +1,4 @@
-Copyright (c) 2015-2017 Parity Technologies
+Copyright (c) 2015-2020 Parity Technologies
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
diff --git a/contract-address/CHANGELOG.md b/contract-address/CHANGELOG.md
index 927c9dc9c..546bc458e 100644
--- a/contract-address/CHANGELOG.md
+++ b/contract-address/CHANGELOG.md
@@ -5,3 +5,4 @@ The format is based on [Keep a Changelog].
[Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
## [Unreleased]
+- License changed from MIT to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
diff --git a/contract-address/Cargo.toml b/contract-address/Cargo.toml
index 8b4f05682..21486e7a2 100644
--- a/contract-address/Cargo.toml
+++ b/contract-address/Cargo.toml
@@ -2,7 +2,7 @@
name = "contract-address"
version = "0.3.0"
authors = ["Parity Technologies "]
-license = "MIT"
+license = "MIT/Apache2.0"
homepage = "https://github.com/paritytech/parity-common"
repository = "https://github.com/paritytech/parity-common"
description = "A utility crate to create an ethereum contract address"
diff --git a/contract-address/src/lib.rs b/contract-address/src/lib.rs
index 1d4068d7d..787f8b06f 100644
--- a/contract-address/src/lib.rs
+++ b/contract-address/src/lib.rs
@@ -1,18 +1,10 @@
-// Copyright 2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity Ethereum.
-
-// Parity Ethereum is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity Ethereum is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity Ethereum. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
#![cfg_attr(feature = "external_doc", feature(external_doc))]
#![cfg_attr(feature = "external_doc", doc(include = "../README.md"))]
diff --git a/ethbloom/CHANGELOG.md b/ethbloom/CHANGELOG.md
index 1edf138b9..677e06714 100644
--- a/ethbloom/CHANGELOG.md
+++ b/ethbloom/CHANGELOG.md
@@ -6,6 +6,7 @@ The format is based on [Keep a Changelog].
## [Unreleased]
- Removed `libc` feature. [#317](https://github.com/paritytech/parity-common/pull/317)
+- License changed from MIT to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
## [0.8.1] - 2019-10-24
### Dependencies
diff --git a/ethbloom/Cargo.toml b/ethbloom/Cargo.toml
index f9f9960fb..cbf9112a0 100644
--- a/ethbloom/Cargo.toml
+++ b/ethbloom/Cargo.toml
@@ -3,7 +3,7 @@ name = "ethbloom"
version = "0.8.1"
authors = ["Parity Technologies "]
description = "Ethereum bloom filter"
-license = "MIT"
+license = "MIT/Apache2.0"
documentation = "https://docs.rs/ethbloom"
homepage = "https://github.com/paritytech/parity-common"
repository = "https://github.com/paritytech/parity-common"
diff --git a/ethbloom/benches/bloom.rs b/ethbloom/benches/bloom.rs
index 005cfd88f..f3de3b7b0 100644
--- a/ethbloom/benches/bloom.rs
+++ b/ethbloom/benches/bloom.rs
@@ -1,3 +1,11 @@
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
use criterion::{criterion_group, criterion_main, Criterion};
use ethbloom::{Bloom, Input};
use hex_literal::hex;
diff --git a/ethbloom/benches/unrolling.rs b/ethbloom/benches/unrolling.rs
index 5fd6883ce..647528eb9 100644
--- a/ethbloom/benches/unrolling.rs
+++ b/ethbloom/benches/unrolling.rs
@@ -1,3 +1,11 @@
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
use criterion::{criterion_group, criterion_main, Criterion};
use crunchy::unroll;
use rand::RngCore;
diff --git a/ethbloom/src/lib.rs b/ethbloom/src/lib.rs
index 49a18214f..c12f5cab8 100644
--- a/ethbloom/src/lib.rs
+++ b/ethbloom/src/lib.rs
@@ -1,3 +1,11 @@
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
//!
//! ```
//! use hex_literal::hex;
diff --git a/ethereum-types/CHANGELOG.md b/ethereum-types/CHANGELOG.md
index 6fad76681..1e06ff2b0 100644
--- a/ethereum-types/CHANGELOG.md
+++ b/ethereum-types/CHANGELOG.md
@@ -5,5 +5,7 @@ The format is based on [Keep a Changelog].
[Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
## [Unreleased]
+- License changed from MIT to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
+
### Added
- uint error type is re-exported (https://github.com/paritytech/parity-common/pull/244)
diff --git a/ethereum-types/Cargo.toml b/ethereum-types/Cargo.toml
index 8153ea823..b706f2873 100644
--- a/ethereum-types/Cargo.toml
+++ b/ethereum-types/Cargo.toml
@@ -2,7 +2,7 @@
name = "ethereum-types"
version = "0.8.0"
authors = ["Parity Technologies "]
-license = "MIT"
+license = "MIT/Apache2.0"
homepage = "https://github.com/paritytech/parity-common"
description = "Ethereum types"
edition = "2018"
diff --git a/ethereum-types/src/hash.rs b/ethereum-types/src/hash.rs
index 9fe385c5b..9e2057dec 100644
--- a/ethereum-types/src/hash.rs
+++ b/ethereum-types/src/hash.rs
@@ -1,3 +1,11 @@
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
use crate::{U128, U256, U512, U64};
use fixed_hash::*;
use impl_rlp::impl_fixed_hash_rlp;
diff --git a/ethereum-types/src/lib.rs b/ethereum-types/src/lib.rs
index 9bc756ba0..d94ae57c0 100644
--- a/ethereum-types/src/lib.rs
+++ b/ethereum-types/src/lib.rs
@@ -1,3 +1,11 @@
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
#![cfg_attr(not(feature = "std"), no_std)]
mod hash;
diff --git a/ethereum-types/src/uint.rs b/ethereum-types/src/uint.rs
index 5cf35feae..87d09541c 100644
--- a/ethereum-types/src/uint.rs
+++ b/ethereum-types/src/uint.rs
@@ -1,3 +1,11 @@
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
use impl_rlp::impl_uint_rlp;
#[cfg(feature = "serialize")]
use impl_serde::impl_uint_serde;
diff --git a/ethereum-types/tests/serde.rs b/ethereum-types/tests/serde.rs
index 4a92241cf..15796c3c7 100644
--- a/ethereum-types/tests/serde.rs
+++ b/ethereum-types/tests/serde.rs
@@ -1,4 +1,4 @@
-// Copyright 2019 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/fixed-hash/CHANGELOG.md b/fixed-hash/CHANGELOG.md
index adf179a5e..cfea43299 100644
--- a/fixed-hash/CHANGELOG.md
+++ b/fixed-hash/CHANGELOG.md
@@ -6,6 +6,7 @@ The format is based on [Keep a Changelog].
## [Unreleased]
- Removed `libc` feature. [#317](https://github.com/paritytech/parity-common/pull/317)
+- License changed from MIT to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
## [0.5.2] - 2019-12-19
### Fixed
diff --git a/fixed-hash/Cargo.toml b/fixed-hash/Cargo.toml
index c12d35c57..41bf7d237 100644
--- a/fixed-hash/Cargo.toml
+++ b/fixed-hash/Cargo.toml
@@ -2,7 +2,7 @@
name = "fixed-hash"
version = "0.5.2"
authors = ["Parity Technologies "]
-license = "MIT"
+license = "MIT/Apache2.0"
homepage = "https://github.com/paritytech/parity-common"
repository = "https://github.com/paritytech/parity-common"
description = "Macros to define custom fixed-size hash types"
diff --git a/fixed-hash/src/hash.rs b/fixed-hash/src/hash.rs
index 46f5c7748..e7fdf0e4c 100644
--- a/fixed-hash/src/hash.rs
+++ b/fixed-hash/src/hash.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2017 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/fixed-hash/src/lib.rs b/fixed-hash/src/lib.rs
index 027ba2284..748101c9f 100644
--- a/fixed-hash/src/lib.rs
+++ b/fixed-hash/src/lib.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2017 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/fixed-hash/src/tests.rs b/fixed-hash/src/tests.rs
index da14bed13..33c1956b7 100644
--- a/fixed-hash/src/tests.rs
+++ b/fixed-hash/src/tests.rs
@@ -1,3 +1,11 @@
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
construct_fixed_hash! { pub struct H32(4); }
construct_fixed_hash! { pub struct H64(8); }
construct_fixed_hash! { pub struct H128(16); }
diff --git a/keccak-hash/CHANGELOG.md b/keccak-hash/CHANGELOG.md
index c1208e434..4b6c6795a 100644
--- a/keccak-hash/CHANGELOG.md
+++ b/keccak-hash/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog].
[Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
## [Unreleased]
+- License changed from GPL3 to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
## [0.4.1] - 2019-10-24
### Dependencies
diff --git a/keccak-hash/Cargo.toml b/keccak-hash/Cargo.toml
index 3d7d88943..49c9506dd 100644
--- a/keccak-hash/Cargo.toml
+++ b/keccak-hash/Cargo.toml
@@ -5,7 +5,7 @@ description = "`keccak-hash` is a set of utility functions to facilitate working
authors = ["Parity Technologies "]
repository = "https://github.com/paritytech/parity-common"
readme = "README.md"
-license = "GPL-3.0"
+license = "MIT/Apache-2.0"
edition = "2018"
[dependencies]
diff --git a/keccak-hash/benches/keccak_256.rs b/keccak-hash/benches/keccak_256.rs
index 5c5794bf5..97e9ee13d 100644
--- a/keccak-hash/benches/keccak_256.rs
+++ b/keccak-hash/benches/keccak_256.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use criterion::{black_box, criterion_group, criterion_main, Criterion};
use keccak_hash::keccak;
diff --git a/keccak-hash/src/lib.rs b/keccak-hash/src/lib.rs
index e66650b39..e9f410672 100644
--- a/keccak-hash/src/lib.rs
+++ b/keccak-hash/src/lib.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
#![cfg_attr(not(feature = "std"), no_std)]
diff --git a/kvdb-memorydb/CHANGELOG.md b/kvdb-memorydb/CHANGELOG.md
index f2f80a709..cb6163d43 100644
--- a/kvdb-memorydb/CHANGELOG.md
+++ b/kvdb-memorydb/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog].
[Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
## [Unreleased]
+- License changed from GPL3 to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
## [0.4.0] - 2019-02-05
- Bump parking_lot to 0.10. [#332](https://github.com/paritytech/parity-common/pull/332)
diff --git a/kvdb-memorydb/Cargo.toml b/kvdb-memorydb/Cargo.toml
index 954a1e117..24d6a9991 100644
--- a/kvdb-memorydb/Cargo.toml
+++ b/kvdb-memorydb/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.4.0"
authors = ["Parity Technologies "]
repository = "https://github.com/paritytech/parity-common"
description = "A key-value in-memory database that implements the `KeyValueDB` trait"
-license = "GPL-3.0"
+license = "MIT/Apache-2.0"
edition = "2018"
[dependencies]
diff --git a/kvdb-memorydb/src/lib.rs b/kvdb-memorydb/src/lib.rs
index 1f40d24cc..51bac41f0 100644
--- a/kvdb-memorydb/src/lib.rs
+++ b/kvdb-memorydb/src/lib.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2020 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use kvdb::{DBOp, DBTransaction, DBValue, KeyValueDB};
use parity_util_mem::MallocSizeOf;
diff --git a/kvdb-rocksdb/CHANGELOG.md b/kvdb-rocksdb/CHANGELOG.md
index 10710343c..ac4c2d558 100644
--- a/kvdb-rocksdb/CHANGELOG.md
+++ b/kvdb-rocksdb/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog].
[Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
## [Unreleased]
+- License changed from GPL3 to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
## [0.5.0] - 2019-02-05
- Bump parking_lot to 0.10. [#332](https://github.com/paritytech/parity-common/pull/332
diff --git a/kvdb-rocksdb/Cargo.toml b/kvdb-rocksdb/Cargo.toml
index 2f67b8d99..1a51844e9 100644
--- a/kvdb-rocksdb/Cargo.toml
+++ b/kvdb-rocksdb/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.5.0"
authors = ["Parity Technologies "]
repository = "https://github.com/paritytech/parity-common"
description = "kvdb implementation backed by RocksDB"
-license = "GPL-3.0"
+license = "MIT/Apache-2.0"
edition = "2018"
[[bench]]
diff --git a/kvdb-rocksdb/benches/bench_read_perf.rs b/kvdb-rocksdb/benches/bench_read_perf.rs
index 3b4cde3cf..8c17d8981 100644
--- a/kvdb-rocksdb/benches/bench_read_perf.rs
+++ b/kvdb-rocksdb/benches/bench_read_perf.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity Ethereum.
-
-// Parity Ethereum is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity Ethereum is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity Ethereum. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Benchmark RocksDB read performance.
//! The benchmark setup consists in writing `NEEDLES * NEEDLES_TO_HAYSTACK_RATIO` 32-bytes random
diff --git a/kvdb-rocksdb/src/iter.rs b/kvdb-rocksdb/src/iter.rs
index 881aa724e..71482f446 100644
--- a/kvdb-rocksdb/src/iter.rs
+++ b/kvdb-rocksdb/src/iter.rs
@@ -1,18 +1,10 @@
-// Copyright 2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! This module contains an implementation of a RocksDB iterator
//! wrapped inside a `RwLock`. Since `RwLock` "owns" the inner data,
diff --git a/kvdb-rocksdb/src/lib.rs b/kvdb-rocksdb/src/lib.rs
index 40ee0f595..6dfb221ff 100644
--- a/kvdb-rocksdb/src/lib.rs
+++ b/kvdb-rocksdb/src/lib.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2020 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
mod iter;
mod stats;
diff --git a/kvdb-rocksdb/src/stats.rs b/kvdb-rocksdb/src/stats.rs
index 039dd3a88..80fa85ce2 100644
--- a/kvdb-rocksdb/src/stats.rs
+++ b/kvdb-rocksdb/src/stats.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2020 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use parking_lot::RwLock;
use std::sync::atomic::{AtomicU64, Ordering as AtomicOrdering};
diff --git a/kvdb-shared-tests/Cargo.toml b/kvdb-shared-tests/Cargo.toml
index 91259e851..367eef8b6 100644
--- a/kvdb-shared-tests/Cargo.toml
+++ b/kvdb-shared-tests/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.2.0"
authors = ["Parity Technologies "]
edition = "2018"
description = "Shared tests for kvdb functionality, to be executed against actual implementations"
-license = "GPL-3.0"
+license = "MIT/Apache2.0"
[dependencies]
kvdb = { path = "../kvdb", version = "0.4" }
diff --git a/kvdb-shared-tests/src/lib.rs b/kvdb-shared-tests/src/lib.rs
index 28613c4f3..ca82dc8cd 100644
--- a/kvdb-shared-tests/src/lib.rs
+++ b/kvdb-shared-tests/src/lib.rs
@@ -1,18 +1,10 @@
-// Copyright 2020 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Shared tests for kvdb functionality, to be executed against actual implementations.
diff --git a/kvdb-web/CHANGELOG.md b/kvdb-web/CHANGELOG.md
index 69d10f44a..f967e1838 100644
--- a/kvdb-web/CHANGELOG.md
+++ b/kvdb-web/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog].
[Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
## [Unreleased]
+- License changed from GPL3 to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
## [0.4.0] - 2019-02-05
- Bump parking_lot to 0.10. [#332](https://github.com/paritytech/parity-common/pull/332)
diff --git a/kvdb-web/Cargo.toml b/kvdb-web/Cargo.toml
index a686f6b26..284418ca5 100644
--- a/kvdb-web/Cargo.toml
+++ b/kvdb-web/Cargo.toml
@@ -5,7 +5,7 @@ authors = ["Parity Technologies "]
repository = "https://github.com/paritytech/parity-common"
description = "A key-value database for use in browsers"
documentation = "https://docs.rs/kvdb-web/"
-license = "GPL-3.0"
+license = "MIT/Apache2.0"
edition = "2018"
[dependencies]
diff --git a/kvdb-web/src/error.rs b/kvdb-web/src/error.rs
index cd3916174..e88d44636 100644
--- a/kvdb-web/src/error.rs
+++ b/kvdb-web/src/error.rs
@@ -1,18 +1,10 @@
-// Copyright 2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Errors that can occur when working with IndexedDB.
diff --git a/kvdb-web/src/indexed_db.rs b/kvdb-web/src/indexed_db.rs
index 028b60a0a..4593e3007 100644
--- a/kvdb-web/src/indexed_db.rs
+++ b/kvdb-web/src/indexed_db.rs
@@ -1,18 +1,10 @@
-// Copyright 2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Utility functions to interact with IndexedDB browser API.
diff --git a/kvdb-web/src/lib.rs b/kvdb-web/src/lib.rs
index f73426904..5d9878ec2 100644
--- a/kvdb-web/src/lib.rs
+++ b/kvdb-web/src/lib.rs
@@ -1,18 +1,10 @@
-// Copyright 2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! A key-value database for use in browsers
//!
diff --git a/kvdb-web/tests/indexed_db.rs b/kvdb-web/tests/indexed_db.rs
index fe5d8f6a3..81a765a05 100644
--- a/kvdb-web/tests/indexed_db.rs
+++ b/kvdb-web/tests/indexed_db.rs
@@ -1,18 +1,10 @@
-// Copyright 2019-2020 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! IndexedDB tests.
diff --git a/kvdb/CHANGELOG.md b/kvdb/CHANGELOG.md
index e202aaa7a..ccec27833 100644
--- a/kvdb/CHANGELOG.md
+++ b/kvdb/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog].
[Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
## [Unreleased]
+- License changed from GPL3 to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
## [0.4.0] - 2019-01-06
- Bump parking_lot to 0.10. [#332](https://github.com/paritytech/parity-common/pull/332)
diff --git a/kvdb/Cargo.toml b/kvdb/Cargo.toml
index e6d738877..c955920a9 100644
--- a/kvdb/Cargo.toml
+++ b/kvdb/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.4.0"
authors = ["Parity Technologies "]
repository = "https://github.com/paritytech/parity-common"
description = "Generic key-value trait"
-license = "GPL-3.0"
+license = "MIT/Apache-2.0"
edition = "2018"
[dependencies]
diff --git a/kvdb/src/io_stats.rs b/kvdb/src/io_stats.rs
index d0de5ce36..2f10dc707 100644
--- a/kvdb/src/io_stats.rs
+++ b/kvdb/src/io_stats.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Generic statistics for key-value databases
diff --git a/kvdb/src/lib.rs b/kvdb/src/lib.rs
index afda4af87..6382145ce 100644
--- a/kvdb/src/lib.rs
+++ b/kvdb/src/lib.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Key-Value store abstraction.
diff --git a/rlp/license-header b/license-header
similarity index 87%
rename from rlp/license-header
rename to license-header
index 03df169c8..67d3f3a1a 100644
--- a/rlp/license-header
+++ b/license-header
@@ -1,4 +1,4 @@
-// Copyright 2015-2017 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/parity-bytes/CHANGELOG.md b/parity-bytes/CHANGELOG.md
index cc79bd068..c391629fd 100644
--- a/parity-bytes/CHANGELOG.md
+++ b/parity-bytes/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog].
[Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
## [Unreleased]
+- License changed from GPL3 to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
## [0.1.1] - 2019-10-24
### Dependencies
diff --git a/parity-bytes/Cargo.toml b/parity-bytes/Cargo.toml
index e49adce31..582d6560e 100644
--- a/parity-bytes/Cargo.toml
+++ b/parity-bytes/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.1.1"
authors = ["Parity Technologies "]
repository = "https://github.com/paritytech/parity-common"
description = "byte utilities for Parity"
-license = "GPL-3.0"
+license = "MIT/Apache2.0"
edition = "2018"
[dependencies]
diff --git a/parity-bytes/src/lib.rs b/parity-bytes/src/lib.rs
index 292a6e160..e269776d4 100644
--- a/parity-bytes/src/lib.rs
+++ b/parity-bytes/src/lib.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! General bytes-related utilities.
//!
diff --git a/parity-crypto/CHANGELOG.md b/parity-crypto/CHANGELOG.md
index 591ee42d3..debca1116 100644
--- a/parity-crypto/CHANGELOG.md
+++ b/parity-crypto/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog].
[Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
## [Unreleased]
+- License changed from GPL3 to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
## [0.5.0] - 2020-02-08
- Remove `inv()` from `SecretKey` (breaking) (https://github.com/paritytech/parity-common/pull/258)
diff --git a/parity-crypto/Cargo.toml b/parity-crypto/Cargo.toml
index aa5d7b654..0af20678b 100644
--- a/parity-crypto/Cargo.toml
+++ b/parity-crypto/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.5.0"
authors = ["Parity Technologies "]
repository = "https://github.com/paritytech/parity-common"
description = "Crypto utils used by ethstore and network."
-license = "GPL-3.0"
+license = "MIT/Apache-2.0"
autobenches = false
edition = "2018"
diff --git a/parity-crypto/benches/bench.rs b/parity-crypto/benches/bench.rs
index 6c13aa369..562c50148 100644
--- a/parity-crypto/benches/bench.rs
+++ b/parity-crypto/benches/bench.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use crate::parity_crypto::publickey::Generator;
use criterion::{criterion_group, criterion_main, Bencher, Criterion};
diff --git a/parity-crypto/src/aes.rs b/parity-crypto/src/aes.rs
index de643dceb..120e4ef3f 100644
--- a/parity-crypto/src/aes.rs
+++ b/parity-crypto/src/aes.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use aes::block_cipher_trait::generic_array::GenericArray;
use aes::{Aes128, Aes256};
diff --git a/parity-crypto/src/digest.rs b/parity-crypto/src/digest.rs
index caf57dd0c..9ec5edf56 100644
--- a/parity-crypto/src/digest.rs
+++ b/parity-crypto/src/digest.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use std::marker::PhantomData;
use std::ops::Deref;
diff --git a/parity-crypto/src/error.rs b/parity-crypto/src/error.rs
index 16d67f504..e1a3cceb0 100644
--- a/parity-crypto/src/error.rs
+++ b/parity-crypto/src/error.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use std::{error::Error as StdError, fmt, result};
diff --git a/parity-crypto/src/hmac/mod.rs b/parity-crypto/src/hmac/mod.rs
index 2b082dd45..6d606fdd7 100644
--- a/parity-crypto/src/hmac/mod.rs
+++ b/parity-crypto/src/hmac/mod.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use std::marker::PhantomData;
use std::ops::Deref;
diff --git a/parity-crypto/src/hmac/test.rs b/parity-crypto/src/hmac/test.rs
index 1633cf37c..a13174784 100644
--- a/parity-crypto/src/hmac/test.rs
+++ b/parity-crypto/src/hmac/test.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use super::*;
use hex_literal::hex;
diff --git a/parity-crypto/src/lib.rs b/parity-crypto/src/lib.rs
index c6bcb5251..c3049716c 100644
--- a/parity-crypto/src/lib.rs
+++ b/parity-crypto/src/lib.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Crypto utils used by ethstore and network.
diff --git a/parity-crypto/src/pbkdf2/mod.rs b/parity-crypto/src/pbkdf2/mod.rs
index 099e98893..a3a06e867 100644
--- a/parity-crypto/src/pbkdf2/mod.rs
+++ b/parity-crypto/src/pbkdf2/mod.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
pub struct Salt<'a>(pub &'a [u8]);
pub struct Secret<'a>(pub &'a [u8]);
diff --git a/parity-crypto/src/pbkdf2/test.rs b/parity-crypto/src/pbkdf2/test.rs
index ff8cc685c..b0bed84ad 100644
--- a/parity-crypto/src/pbkdf2/test.rs
+++ b/parity-crypto/src/pbkdf2/test.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use super::*;
diff --git a/parity-crypto/src/publickey/ec_math_utils.rs b/parity-crypto/src/publickey/ec_math_utils.rs
index bd8653b79..5ea82a78a 100644
--- a/parity-crypto/src/publickey/ec_math_utils.rs
+++ b/parity-crypto/src/publickey/ec_math_utils.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity Ethereum.
-
-// Parity Ethereum is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity Ethereum is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity Ethereum. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Multiple primitives for work with public and secret keys and with secp256k1 curve points
diff --git a/parity-crypto/src/publickey/ecdh.rs b/parity-crypto/src/publickey/ecdh.rs
index 8cdaf793a..93a43bed8 100644
--- a/parity-crypto/src/publickey/ecdh.rs
+++ b/parity-crypto/src/publickey/ecdh.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity Ethereum.
-
-// Parity Ethereum is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity Ethereum is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity Ethereum. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! ECDH key agreement scheme implemented as a free function.
diff --git a/parity-crypto/src/publickey/ecdsa_signature.rs b/parity-crypto/src/publickey/ecdsa_signature.rs
index ae245cffb..6853b1586 100644
--- a/parity-crypto/src/publickey/ecdsa_signature.rs
+++ b/parity-crypto/src/publickey/ecdsa_signature.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity Ethereum.
-
-// Parity Ethereum is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity Ethereum is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity Ethereum. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Signature based on ECDSA, algorithm's description: https://en.wikipedia.org/wiki/Elliptic_Curve_Digital_Signature_Algorithm
diff --git a/parity-crypto/src/publickey/ecies.rs b/parity-crypto/src/publickey/ecies.rs
index d7c1354f3..3332f8a94 100644
--- a/parity-crypto/src/publickey/ecies.rs
+++ b/parity-crypto/src/publickey/ecies.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity Ethereum.
-
-// Parity Ethereum is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity Ethereum is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity Ethereum. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Functions for ECIES scheme encryption and decryption
diff --git a/parity-crypto/src/publickey/error.rs b/parity-crypto/src/publickey/error.rs
index 7f9bfb8e0..5ea8ce391 100644
--- a/parity-crypto/src/publickey/error.rs
+++ b/parity-crypto/src/publickey/error.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity Ethereum.
-
-// Parity Ethereum is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity Ethereum is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity Ethereum. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Module specific errors.
diff --git a/parity-crypto/src/publickey/extended_keys.rs b/parity-crypto/src/publickey/extended_keys.rs
index 44307fdf2..be682db39 100644
--- a/parity-crypto/src/publickey/extended_keys.rs
+++ b/parity-crypto/src/publickey/extended_keys.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity Ethereum.
-
-// Parity Ethereum is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity Ethereum is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity Ethereum. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Secret, public keys extended with the entropy (aka chain code), that allows further key derivation
//! Each extended key has 2^31 normal child keys, and 2^31 hardened child keys.
diff --git a/parity-crypto/src/publickey/keypair.rs b/parity-crypto/src/publickey/keypair.rs
index d4fa13b39..f4ac8b287 100644
--- a/parity-crypto/src/publickey/keypair.rs
+++ b/parity-crypto/src/publickey/keypair.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity Ethereum.
-
-// Parity Ethereum is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity Ethereum is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity Ethereum. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Key pair (public + secret) description.
diff --git a/parity-crypto/src/publickey/keypair_generator.rs b/parity-crypto/src/publickey/keypair_generator.rs
index 3afd86a97..9dea21de6 100644
--- a/parity-crypto/src/publickey/keypair_generator.rs
+++ b/parity-crypto/src/publickey/keypair_generator.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity Ethereum.
-
-// Parity Ethereum is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity Ethereum is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity Ethereum. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Random key pair generator. Relies on the secp256k1 C-library to generate random data.
diff --git a/parity-crypto/src/publickey/mod.rs b/parity-crypto/src/publickey/mod.rs
index 8d487b5ad..294d67b38 100644
--- a/parity-crypto/src/publickey/mod.rs
+++ b/parity-crypto/src/publickey/mod.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity Ethereum.
-
-// Parity Ethereum is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity Ethereum is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity Ethereum. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Submodule of crypto utils for working with public key crypto primitives
//! If you are looking for git history please refer to the `ethkey` crate in the `parity-ethereum` repository.
diff --git a/parity-crypto/src/publickey/secret_key.rs b/parity-crypto/src/publickey/secret_key.rs
index 68522ca29..ac938a674 100644
--- a/parity-crypto/src/publickey/secret_key.rs
+++ b/parity-crypto/src/publickey/secret_key.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity Ethereum.
-
-// Parity Ethereum is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity Ethereum is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity Ethereum. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Secret key implementation.
diff --git a/parity-crypto/src/scrypt.rs b/parity-crypto/src/scrypt.rs
index eea1931b3..15b7e14e1 100644
--- a/parity-crypto/src/scrypt.rs
+++ b/parity-crypto/src/scrypt.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use super::{KEY_LENGTH, KEY_LENGTH_AES};
use crate::error::ScryptError;
diff --git a/parity-path/CHANGELOG.md b/parity-path/CHANGELOG.md
index 927c9dc9c..fc0263835 100644
--- a/parity-path/CHANGELOG.md
+++ b/parity-path/CHANGELOG.md
@@ -5,3 +5,4 @@ The format is based on [Keep a Changelog].
[Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
## [Unreleased]
+- License changed from GPL3 to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
diff --git a/parity-path/Cargo.toml b/parity-path/Cargo.toml
index a4096fa73..0c783cf6c 100644
--- a/parity-path/Cargo.toml
+++ b/parity-path/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.1.2"
authors = ["Parity Technologies "]
repository = "https://github.com/paritytech/parity-common"
description = "Path utilities"
-license = "GPL-3.0"
+license = "MIT/Apache-2.0"
edition = "2018"
[dependencies]
diff --git a/parity-path/src/lib.rs b/parity-path/src/lib.rs
index c286678ba..997a040be 100644
--- a/parity-path/src/lib.rs
+++ b/parity-path/src/lib.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Path utilities
use std::path::Path;
diff --git a/parity-util-mem/CHANGELOG.md b/parity-util-mem/CHANGELOG.md
index 855ea42fe..9e99d4c0d 100644
--- a/parity-util-mem/CHANGELOG.md
+++ b/parity-util-mem/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog].
[Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
## [Unreleased]
+- License changed from GPL3 to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
## [0.5.1] - 2019-02-05
- Add different mode for malloc_size_of_is_0 macro dealing with generics #334. [#332](https://github.com/paritytech/parity-common/pull/334)
diff --git a/parity-util-mem/Cargo.toml b/parity-util-mem/Cargo.toml
index d9024ea1c..e0539b23c 100644
--- a/parity-util-mem/Cargo.toml
+++ b/parity-util-mem/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.5.1"
authors = ["Parity Technologies "]
repository = "https://github.com/paritytech/parity-common"
description = "Collection of memory related utilities"
-license = "GPL-3.0"
+license = "MIT/Apache-2.0"
edition = "2018"
[dependencies]
@@ -49,4 +49,4 @@ mimalloc-global = ["mimallocator", "mimalloc-sys"]
# implement additional types
ethereum-impls = ["ethereum-types", "primitive-types"]
# Full estimate: no call to allocator
-estimate-heapsize = []
\ No newline at end of file
+estimate-heapsize = []
diff --git a/parity-util-mem/derive/Cargo.toml b/parity-util-mem/derive/Cargo.toml
index cc208049d..b7648ebd2 100644
--- a/parity-util-mem/derive/Cargo.toml
+++ b/parity-util-mem/derive/Cargo.toml
@@ -2,7 +2,7 @@
name = "parity-util-mem-derive"
version = "0.1.0"
authors = ["Parity Technologies "]
-license = "MIT"
+license = "MIT/Apache2.0"
description = "Crate for memory reporting"
repository = "https://github.com/paritytech/pariry-common/parity-util-mem/derive"
diff --git a/parity-util-mem/derive/lib.rs b/parity-util-mem/derive/lib.rs
index c1c1e504e..2331b0aaa 100644
--- a/parity-util-mem/derive/lib.rs
+++ b/parity-util-mem/derive/lib.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! A crate for deriving the MallocSizeOf trait.
//!
diff --git a/parity-util-mem/src/allocators.rs b/parity-util-mem/src/allocators.rs
index d2953ecfb..e159a32d0 100644
--- a/parity-util-mem/src/allocators.rs
+++ b/parity-util-mem/src/allocators.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! default allocator management
//! Features are:
diff --git a/parity-util-mem/src/ethereum_impls.rs b/parity-util-mem/src/ethereum_impls.rs
index 4379b3b0e..c296d2d40 100644
--- a/parity-util-mem/src/ethereum_impls.rs
+++ b/parity-util-mem/src/ethereum_impls.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Implementation of `MallocSize` for common ethereum types: fixed hashes
//! and uints.
diff --git a/parity-util-mem/src/lib.rs b/parity-util-mem/src/lib.rs
index cdea52e42..87b47716a 100644
--- a/parity-util-mem/src/lib.rs
+++ b/parity-util-mem/src/lib.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Crate for parity memory management related utilities.
//! It includes global allocator choice, heap measurement and
diff --git a/parity-util-mem/src/primitives_impls.rs b/parity-util-mem/src/primitives_impls.rs
index ab5953dcc..cf98bc211 100644
--- a/parity-util-mem/src/primitives_impls.rs
+++ b/parity-util-mem/src/primitives_impls.rs
@@ -1,18 +1,10 @@
-// Copyright 2020 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Implementation of `MallocSize` primitive types.
diff --git a/parity-util-mem/src/sizeof.rs b/parity-util-mem/src/sizeof.rs
index ef63e1000..3d60913e4 100644
--- a/parity-util-mem/src/sizeof.rs
+++ b/parity-util-mem/src/sizeof.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Estimation for heapsize calculation. Usable to replace call to allocator method (for some
//! allocators or simply because we just need a deterministic cunsumption measurement).
diff --git a/parity-util-mem/tests/derive.rs b/parity-util-mem/tests/derive.rs
index 87f8c9f50..4fb5f7328 100644
--- a/parity-util-mem/tests/derive.rs
+++ b/parity-util-mem/tests/derive.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
#![cfg(feature = "std")]
diff --git a/plain_hasher/CHANGELOG.md b/plain_hasher/CHANGELOG.md
index a4bd19586..c9970dedd 100644
--- a/plain_hasher/CHANGELOG.md
+++ b/plain_hasher/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog].
[Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
## [Unreleased]
+- License changed from MIT to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
## [0.2.2] - 2019-10-24
- Migrated to 2018 edition (https://github.com/paritytech/parity-common/pull/213)
diff --git a/plain_hasher/Cargo.toml b/plain_hasher/Cargo.toml
index 2a7f94989..57cf4d0c1 100644
--- a/plain_hasher/Cargo.toml
+++ b/plain_hasher/Cargo.toml
@@ -3,7 +3,7 @@ name = "plain_hasher"
description = "Hasher for 32-byte keys."
version = "0.2.2"
authors = ["Parity Technologies "]
-license = "MIT"
+license = "MIT/Apache2.0"
keywords = ["hash", "hasher"]
homepage = "https://github.com/paritytech/parity-common"
categories = ["no-std"]
diff --git a/plain_hasher/benches/bench.rs b/plain_hasher/benches/bench.rs
index 4ba53bb1a..e14d9d7d7 100644
--- a/plain_hasher/benches/bench.rs
+++ b/plain_hasher/benches/bench.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use std::collections::hash_map::DefaultHasher;
use std::hash::Hasher;
diff --git a/plain_hasher/src/lib.rs b/plain_hasher/src/lib.rs
index 3665995d4..4da4a508b 100644
--- a/plain_hasher/src/lib.rs
+++ b/plain_hasher/src/lib.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
#![cfg_attr(not(feature = "std"), no_std)]
diff --git a/primitive-types/Cargo.toml b/primitive-types/Cargo.toml
index 3131a001f..e6b53391c 100644
--- a/primitive-types/Cargo.toml
+++ b/primitive-types/Cargo.toml
@@ -2,7 +2,7 @@
name = "primitive-types"
version = "0.6.2"
authors = ["Parity Technologies "]
-license = "Apache-2.0/MIT"
+license = "MIT/Apache2.0"
homepage = "https://github.com/paritytech/parity-common"
description = "Primitive types shared by Ethereum and Substrate"
edition = "2018"
diff --git a/primitive-types/impls/codec/Cargo.toml b/primitive-types/impls/codec/Cargo.toml
index 12fda74f2..4b39c10af 100644
--- a/primitive-types/impls/codec/Cargo.toml
+++ b/primitive-types/impls/codec/Cargo.toml
@@ -2,7 +2,7 @@
name = "impl-codec"
version = "0.4.2"
authors = ["Parity Technologies "]
-license = "Apache-2.0/MIT"
+license = "MIT/Apache2.0"
homepage = "https://github.com/paritytech/parity-common"
description = "Parity Codec serialization support for uint and fixed hash."
edition = "2018"
diff --git a/primitive-types/impls/codec/src/lib.rs b/primitive-types/impls/codec/src/lib.rs
index 9e5714ce0..1a4f2e252 100644
--- a/primitive-types/impls/codec/src/lib.rs
+++ b/primitive-types/impls/codec/src/lib.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2018 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/primitive-types/impls/rlp/Cargo.toml b/primitive-types/impls/rlp/Cargo.toml
index 62e957c85..85db3c328 100644
--- a/primitive-types/impls/rlp/Cargo.toml
+++ b/primitive-types/impls/rlp/Cargo.toml
@@ -2,7 +2,7 @@
name = "impl-rlp"
version = "0.2.1"
authors = ["Parity Technologies "]
-license = "Apache-2.0/MIT"
+license = "MIT/Apache2.0"
homepage = "https://github.com/paritytech/parity-common"
description = "RLP serialization support for uint and fixed hash."
edition = "2018"
diff --git a/primitive-types/impls/rlp/src/lib.rs b/primitive-types/impls/rlp/src/lib.rs
index 16a711370..e542c6e6e 100644
--- a/primitive-types/impls/rlp/src/lib.rs
+++ b/primitive-types/impls/rlp/src/lib.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2018 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/primitive-types/impls/serde/Cargo.toml b/primitive-types/impls/serde/Cargo.toml
index a57ada2a2..641a59e6a 100644
--- a/primitive-types/impls/serde/Cargo.toml
+++ b/primitive-types/impls/serde/Cargo.toml
@@ -3,7 +3,7 @@ name = "impl-serde"
version = "0.3.0"
authors = ["Parity Technologies "]
edition = "2018"
-license = "Apache-2.0/MIT"
+license = "MIT/Apache2.0"
homepage = "https://github.com/paritytech/parity-common"
description = "Serde serialization support for uint and fixed hash."
diff --git a/primitive-types/impls/serde/benches/impl_serde.rs b/primitive-types/impls/serde/benches/impl_serde.rs
index d19a97fda..c7a1efea8 100644
--- a/primitive-types/impls/serde/benches/impl_serde.rs
+++ b/primitive-types/impls/serde/benches/impl_serde.rs
@@ -1,4 +1,4 @@
-// Copyright 2019 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/primitive-types/impls/serde/benches/input.rs b/primitive-types/impls/serde/benches/input.rs
index 00d5efdc5..5673f1f52 100644
--- a/primitive-types/impls/serde/benches/input.rs
+++ b/primitive-types/impls/serde/benches/input.rs
@@ -1,3 +1,11 @@
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
/// Hexdecimal string 64 chars (32 bytes)
pub const HEX_64_CHARS: &str = "\"0x6402541b4e3c2ab65306aec48fce5adedc60e3ac465c3d7036c731e0b2e49209\"";
diff --git a/primitive-types/impls/serde/src/lib.rs b/primitive-types/impls/serde/src/lib.rs
index 661ff7c0e..500a60cc4 100644
--- a/primitive-types/impls/serde/src/lib.rs
+++ b/primitive-types/impls/serde/src/lib.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2019 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/primitive-types/impls/serde/src/serialize.rs b/primitive-types/impls/serde/src/serialize.rs
index 431a56ec7..542ac0dc8 100644
--- a/primitive-types/impls/serde/src/serialize.rs
+++ b/primitive-types/impls/serde/src/serialize.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2019 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/primitive-types/src/lib.rs b/primitive-types/src/lib.rs
index 5e3f77ec4..0b4af97c8 100644
--- a/primitive-types/src/lib.rs
+++ b/primitive-types/src/lib.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2018 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/rlp/benches/rlp.rs b/rlp/benches/rlp.rs
index 1fcd8b21f..d1de4c93b 100644
--- a/rlp/benches/rlp.rs
+++ b/rlp/benches/rlp.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2017 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/rlp/src/error.rs b/rlp/src/error.rs
index d810130b0..a965e5626 100644
--- a/rlp/src/error.rs
+++ b/rlp/src/error.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2017 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/rlp/src/impls.rs b/rlp/src/impls.rs
index 4f30b8a59..c4815019f 100644
--- a/rlp/src/impls.rs
+++ b/rlp/src/impls.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2017 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/rlp/src/lib.rs b/rlp/src/lib.rs
index a4c66e2ac..3a913d69f 100644
--- a/rlp/src/lib.rs
+++ b/rlp/src/lib.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2017 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/rlp/src/rlpin.rs b/rlp/src/rlpin.rs
index 6cdfaa808..319723c06 100644
--- a/rlp/src/rlpin.rs
+++ b/rlp/src/rlpin.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2017 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/rlp/src/stream.rs b/rlp/src/stream.rs
index 851b845b9..14983d5ef 100644
--- a/rlp/src/stream.rs
+++ b/rlp/src/stream.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2017 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/rlp/src/traits.rs b/rlp/src/traits.rs
index 13531a1b6..b5dfa2764 100644
--- a/rlp/src/traits.rs
+++ b/rlp/src/traits.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2017 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/rlp/tests/tests.rs b/rlp/tests/tests.rs
index 6f51b9bd3..ac8e8d951 100644
--- a/rlp/tests/tests.rs
+++ b/rlp/tests/tests.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2017 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/trace-time/CHANGELOG.md b/trace-time/CHANGELOG.md
index 0231c53a1..0da35007c 100644
--- a/trace-time/CHANGELOG.md
+++ b/trace-time/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog].
[Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
## [Unreleased]
+- License changed from GPL3 to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
## [0.1.2] - 2019-10-24
- Migrated to 2018 edition (https://github.com/paritytech/parity-common/pull/232)
diff --git a/trace-time/Cargo.toml b/trace-time/Cargo.toml
index f1ec6e9a1..fca5a7619 100644
--- a/trace-time/Cargo.toml
+++ b/trace-time/Cargo.toml
@@ -4,7 +4,7 @@ description = "Easily trace time to execute a scope."
version = "0.1.2"
authors = ["Parity Technologies "]
repository = "https://github.com/paritytech/parity-common"
-license = "GPL-3.0"
+license = "MIT/Apache2.0"
edition = "2018"
[dependencies]
diff --git a/trace-time/src/lib.rs b/trace-time/src/lib.rs
index 65769ee81..e5ecf2d09 100644
--- a/trace-time/src/lib.rs
+++ b/trace-time/src/lib.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Performance timer with logging
diff --git a/transaction-pool/CHANGELOG.md b/transaction-pool/CHANGELOG.md
index bcd99d5a9..a054f332b 100644
--- a/transaction-pool/CHANGELOG.md
+++ b/transaction-pool/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog].
[Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
## [Unreleased]
+- License changed from GPL3 to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
## [2.0.2] - 2019-10-24
- Updated to 2018 edition idioms (https://github.com/paritytech/parity-common/pull/237)
diff --git a/transaction-pool/Cargo.toml b/transaction-pool/Cargo.toml
index 844607efa..0da12d924 100644
--- a/transaction-pool/Cargo.toml
+++ b/transaction-pool/Cargo.toml
@@ -2,7 +2,7 @@
description = "Generic transaction pool."
name = "transaction-pool"
version = "2.0.2"
-license = "GPL-3.0"
+license = "MIT/Apache2.0"
authors = ["Parity Technologies "]
repository = "https://github.com/paritytech/parity-common"
edition = "2018"
diff --git a/transaction-pool/src/error.rs b/transaction-pool/src/error.rs
index 348082f6a..20935c23b 100644
--- a/transaction-pool/src/error.rs
+++ b/transaction-pool/src/error.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use std::{error, fmt, result};
diff --git a/transaction-pool/src/lib.rs b/transaction-pool/src/lib.rs
index 66e93fffe..dd49fb3a8 100644
--- a/transaction-pool/src/lib.rs
+++ b/transaction-pool/src/lib.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Generic Transaction Pool
//!
diff --git a/transaction-pool/src/listener.rs b/transaction-pool/src/listener.rs
index 566b318ee..5a3f1a0c7 100644
--- a/transaction-pool/src/listener.rs
+++ b/transaction-pool/src/listener.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use crate::error::Error;
use std::{
diff --git a/transaction-pool/src/options.rs b/transaction-pool/src/options.rs
index 8e1c1002d..947af30a9 100644
--- a/transaction-pool/src/options.rs
+++ b/transaction-pool/src/options.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
/// Transaction Pool options.
#[derive(Clone, Debug, PartialEq)]
diff --git a/transaction-pool/src/pool.rs b/transaction-pool/src/pool.rs
index 63bb0a07f..2eb324020 100644
--- a/transaction-pool/src/pool.rs
+++ b/transaction-pool/src/pool.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use log::{trace, warn};
use std::collections::{hash_map, BTreeSet, HashMap};
diff --git a/transaction-pool/src/ready.rs b/transaction-pool/src/ready.rs
index 45e85ca29..009eae273 100644
--- a/transaction-pool/src/ready.rs
+++ b/transaction-pool/src/ready.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
/// Transaction readiness.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
diff --git a/transaction-pool/src/replace.rs b/transaction-pool/src/replace.rs
index a278edb80..cbae6319b 100644
--- a/transaction-pool/src/replace.rs
+++ b/transaction-pool/src/replace.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! When queue limits are reached, decide whether to replace an existing transaction from the pool
diff --git a/transaction-pool/src/scoring.rs b/transaction-pool/src/scoring.rs
index 313bd6bc3..b7f75e7fc 100644
--- a/transaction-pool/src/scoring.rs
+++ b/transaction-pool/src/scoring.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! A transactions ordering abstraction.
diff --git a/transaction-pool/src/status.rs b/transaction-pool/src/status.rs
index b9e7656d4..615e40cb7 100644
--- a/transaction-pool/src/status.rs
+++ b/transaction-pool/src/status.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
/// Light pool status.
/// This status is cheap to compute and can be called frequently.
diff --git a/transaction-pool/src/tests/helpers.rs b/transaction-pool/src/tests/helpers.rs
index f757ac8d7..8f6e5fb99 100644
--- a/transaction-pool/src/tests/helpers.rs
+++ b/transaction-pool/src/tests/helpers.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use std::cmp;
use std::collections::HashMap;
diff --git a/transaction-pool/src/tests/mod.rs b/transaction-pool/src/tests/mod.rs
index db5ea2885..2d80b4a3d 100644
--- a/transaction-pool/src/tests/mod.rs
+++ b/transaction-pool/src/tests/mod.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
mod helpers;
mod tx_builder;
diff --git a/transaction-pool/src/tests/tx_builder.rs b/transaction-pool/src/tests/tx_builder.rs
index 83f7b13a0..d543e830e 100644
--- a/transaction-pool/src/tests/tx_builder.rs
+++ b/transaction-pool/src/tests/tx_builder.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use super::{Address, Transaction, H256, U256};
use ethereum_types::BigEndianHash;
diff --git a/transaction-pool/src/transactions.rs b/transaction-pool/src/transactions.rs
index 5fc963d78..4d6d126af 100644
--- a/transaction-pool/src/transactions.rs
+++ b/transaction-pool/src/transactions.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use std::{fmt, mem};
diff --git a/transaction-pool/src/verifier.rs b/transaction-pool/src/verifier.rs
index 991b78ebd..d28e5a55e 100644
--- a/transaction-pool/src/verifier.rs
+++ b/transaction-pool/src/verifier.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use crate::VerifiedTransaction;
diff --git a/triehash/CHANGELOG.md b/triehash/CHANGELOG.md
index 320e4f84f..071c96204 100644
--- a/triehash/CHANGELOG.md
+++ b/triehash/CHANGELOG.md
@@ -5,6 +5,7 @@ The format is based on [Keep a Changelog].
[Keep a Changelog]: http://keepachangelog.com/en/1.0.0/
## [Unreleased]
+- License changed from GPL3 to dual MIT/Apache2. [#342](https://github.com/paritytech/parity-common/pull/342)
## [0.8.2] - 2019-12-15
- Added no-std support (https://github.com/paritytech/parity-common/pull/280)
diff --git a/triehash/Cargo.toml b/triehash/Cargo.toml
index a941edaa0..407489469 100644
--- a/triehash/Cargo.toml
+++ b/triehash/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.8.2"
authors = ["Parity Technologies "]
description = "In-memory patricia trie operations"
repository = "https://github.com/paritytech/parity-common"
-license = "GPL-3.0"
+license = "MIT/Apache2.0"
edition = "2018"
[dependencies]
diff --git a/triehash/benches/triehash.rs b/triehash/benches/triehash.rs
index 684484265..14ce0dd6b 100644
--- a/triehash/benches/triehash.rs
+++ b/triehash/benches/triehash.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2018 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
use criterion::{criterion_group, criterion_main, Criterion};
use ethereum_types::H256;
diff --git a/triehash/src/lib.rs b/triehash/src/lib.rs
index 81a005826..a60a24998 100644
--- a/triehash/src/lib.rs
+++ b/triehash/src/lib.rs
@@ -1,18 +1,10 @@
-// Copyright 2015-2019 Parity Technologies (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity. If not, see .
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
//! Generetes trie root.
//!
diff --git a/uint/benches/bigint.rs b/uint/benches/bigint.rs
index ea0284cdd..ec36c576a 100644
--- a/uint/benches/bigint.rs
+++ b/uint/benches/bigint.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2017 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/uint/examples/modular.rs b/uint/examples/modular.rs
index abc754f82..30b236992 100644
--- a/uint/examples/modular.rs
+++ b/uint/examples/modular.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2017 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/uint/fuzz/fuzz_targets/div_mod.rs b/uint/fuzz/fuzz_targets/div_mod.rs
index 7bcf751a8..102407ecc 100644
--- a/uint/fuzz/fuzz_targets/div_mod.rs
+++ b/uint/fuzz/fuzz_targets/div_mod.rs
@@ -1,3 +1,11 @@
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
#![no_main]
use libfuzzer_sys::fuzz_target;
diff --git a/uint/fuzz/fuzz_targets/div_mod_word.rs b/uint/fuzz/fuzz_targets/div_mod_word.rs
index 890774c08..285304944 100644
--- a/uint/fuzz/fuzz_targets/div_mod_word.rs
+++ b/uint/fuzz/fuzz_targets/div_mod_word.rs
@@ -1,3 +1,11 @@
+// Copyright 2020 Parity Technologies
+//
+// Licensed under the Apache License, Version 2.0 or the MIT license
+// , at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
#![no_main]
use libfuzzer_sys::fuzz_target;
diff --git a/uint/src/lib.rs b/uint/src/lib.rs
index bba720be8..144c53e32 100644
--- a/uint/src/lib.rs
+++ b/uint/src/lib.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2017 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/uint/src/uint.rs b/uint/src/uint.rs
index 7dd1bca42..ac0ffc85e 100644
--- a/uint/src/uint.rs
+++ b/uint/src/uint.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2017 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license
diff --git a/uint/tests/uint_tests.rs b/uint/tests/uint_tests.rs
index ddeb747c3..2e226ad36 100644
--- a/uint/tests/uint_tests.rs
+++ b/uint/tests/uint_tests.rs
@@ -1,4 +1,4 @@
-// Copyright 2015-2019 Parity Technologies
+// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 or the MIT license