Add pallet-flow

.editorconfig

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+root = true
+[*]
+indent_style=tab
+indent_size=tab
+tab_width=4
+end_of_line=lf
+charset=utf-8
+trim_trailing_whitespace=true
+max_line_length=120
+insert_final_newline=true
+
+[*.{yml,yaml}]
+indent_style=space
+indent_size=2
+tab_width=8
+end_of_line=lf

flow/Cargo.toml

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+[package]
+name = "pallet-flow"
+version = "1.0.1-dev"
+authors = ["zero.io","gamedao.co"]
+edition = "2018"
+license = "GPL-3.0-or-later"
+description = "Simple Crowdfunding module, supporting multiple campaigns, which are all settled with the platform currency."
+repository = "https://github.com/gamedaoco/gamedao-protocol"
+
+[dependencies]
+serde = { version = "1.0.124", optional = true }
+codec = { package = "parity-scale-codec", version = "2.3.1", default-features = false }
+scale-info = { version = "1.0", default-features = false, features = ["derive"] }
+sp-runtime = { git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.13", default-features = false }
+sp-std = { git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.13", default-features = false }
+frame-support = { git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.13", default-features = false }
+frame-system = { git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.13", default-features = false }
+frame-benchmarking = { git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.13", default-features = false, optional = true }
+
+orml-traits = { path = "../../orml/traits", default-features = false }
+zero-primitives = { package = "zero-primitives", path = "../../primitives", default-features = false }
+gamedao-protocol-support = { package = "gamedao-protocol-support", path = "../support", default-features = false }
+
+[dev-dependencies]
+frame-support-test = { git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.13" }
+sp-io = { git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.13" }
+sp-runtime = { git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.13" }
+sp-core = { git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.13" }
+
+pallet-timestamp = { default-features = false, git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.13" }
+pallet-balances = { default-features = false, git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.13" }
+
+orml-tokens = { path = "../../orml/tokens", default-features = false }
+orml-currencies = { path = "../../orml/currencies", default-features = false }
+
+[features]
+default = ["std"]
+runtime-benchmarks = ["frame-benchmarking"]
+std = [
+	"codec/std",
+	"serde/std",
+	"scale-info/std",
+
+	"frame-support/std",
+	"frame-system/std",
+	"frame-benchmarking/std",
+
+	"sp-core/std",
+	"sp-std/std",
+	"sp-runtime/std",
+	"orml-traits/std",
+	"orml-tokens/std",
+	"orml-currencies/std",
+	"gamedao-protocol-support/std",
+]
+try-runtime = ["frame-support/try-runtime"]

flow/README.md

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+# Module Flow
+
+Simple Crowdfunding module, supporting multiple campaigns, which are all settled with the platform currency.
+
+This pallet provides a simple on-chain crowdfunding mechanism:
+- creator can create a campaign with individual length and amount of funds in PLAY to raise
+- investor can invest his funds into one of the running campaigns and become an investor
+
+Upon finalization:
+- creator can request allocation of funds
+- investors can collectively approve allocation of funds
+
+TODO:
+- supervisor can lock, cancel campaigns
+...
+
+1. create campaigns with custom funding goal and runtime
+2. invest into open campaigns
+
+3. request withdrawal (unreserve) as creator from successful campaign
+4. approve withdrawals (unreserve) as investor from successfully funded campaigns