Fix CIP-64 gas price opcode, second take#107
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karlb merged 1 commit intorelease/v1.0.0-rc.4from Nov 28, 2025
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The previous fix was not correct and only accidentally made the tests pass. The GASPRICE opcodes fetches the effective gas price and passes in the base fee in native tokens. We work around this by calculating the correct effective gas price in advance and ignoring the passed in base fee.
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gastonponti
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The previous fix was not correct and only accidentally made the tests pass. The GASPRICE opcodes fetches the effective gas price and passes in the base fee in native tokens. We work around this by calculating the correct effective gas price in advance and ignoring the passed in base fee.
karlb
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Dec 3, 2025
The previous test case often passed even with wrong implementations because it only noticed if a single `if` condition on the gas price triggers. Instead, the actual gas price return value should be part of the tested result to notice any deviations from the expected value. This is achieved by emitting the result in an event/log so that it becomes part of the receipt. Full bytecode explanation: | Offset | Bytecode | Opcode | Stack (after) | Description | |--------|----------|--------------|-----------------|------------------------------------------| | 0x00 | `3a` | `GASPRICE` | `[gasPrice]` | Pushes the tx's gas price onto the stack | | 0x01 | `60 00` | `PUSH1 0x00` | `[0, gasPrice]` | Pushes memory offset 0 | | 0x03 | `52` | `MSTORE` | `[]` | Stores gasPrice at memory[0:32] | | 0x04 | `60 20` | `PUSH1 0x20` | `[32]` | Pushes 32 (0x20) - the size in bytes | | 0x06 | `60 00` | `PUSH1 0x00` | `[0, 32]` | Pushes memory offset 0 | | 0x08 | `a0` | `LOG0` | `[]` | Emits anonymous log from memory[0:32] | As intended, the test behaves like this: ``` fail cd86616 Fix CIP-64 gas price opcode (#106) fail 9d02406 CIP-64: actual GASPRICE opcode fix (#107) pass (the missing revert has no effect on the returned gas price) 7be19b3 Revert bad fix for GASPRICE opcode (#109) pass ``` So if we had the test before doing the changes, we would have correctly rejected the wrong fix.
karlb
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Dec 8, 2025
* Better CIP-64 GASPRICE opcode test The previous test case often passed even with wrong implementations because it only noticed if a single `if` condition on the gas price triggers. Instead, the actual gas price return value should be part of the tested result to notice any deviations from the expected value. This is achieved by emitting the result in an event/log so that it becomes part of the receipt. Full bytecode explanation: | Offset | Bytecode | Opcode | Stack (after) | Description | |--------|----------|--------------|-----------------|------------------------------------------| | 0x00 | `3a` | `GASPRICE` | `[gasPrice]` | Pushes the tx's gas price onto the stack | | 0x01 | `60 00` | `PUSH1 0x00` | `[0, gasPrice]` | Pushes memory offset 0 | | 0x03 | `52` | `MSTORE` | `[]` | Stores gasPrice at memory[0:32] | | 0x04 | `60 20` | `PUSH1 0x20` | `[32]` | Pushes 32 (0x20) - the size in bytes | | 0x06 | `60 00` | `PUSH1 0x00` | `[0, 32]` | Pushes memory offset 0 | | 0x08 | `a0` | `LOG0` | `[]` | Emits anonymous log from memory[0:32] | As intended, the test behaves like this: ``` fail cd86616 Fix CIP-64 gas price opcode (#106) fail 9d02406 CIP-64: actual GASPRICE opcode fix (#107) pass (the missing revert has no effect on the returned gas price) 7be19b3 Revert bad fix for GASPRICE opcode (#109) pass ``` So if we had the test before doing the changes, we would have correctly rejected the wrong fix. * Fix typos Co-authored-by: Paul Lange <palango@users.noreply.github.com> --------- Co-authored-by: Paul Lange <palango@users.noreply.github.com>
karlb
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Dec 8, 2025
The previous fix was not correct and only accidentally made the tests pass. The GASPRICE opcodes fetches the effective gas price and passes in the base fee in native tokens. We work around this by calculating the correct effective gas price in advance and ignoring the passed in base fee.
karlb
added a commit
that referenced
this pull request
Dec 8, 2025
* Better CIP-64 GASPRICE opcode test The previous test case often passed even with wrong implementations because it only noticed if a single `if` condition on the gas price triggers. Instead, the actual gas price return value should be part of the tested result to notice any deviations from the expected value. This is achieved by emitting the result in an event/log so that it becomes part of the receipt. Full bytecode explanation: | Offset | Bytecode | Opcode | Stack (after) | Description | |--------|----------|--------------|-----------------|------------------------------------------| | 0x00 | `3a` | `GASPRICE` | `[gasPrice]` | Pushes the tx's gas price onto the stack | | 0x01 | `60 00` | `PUSH1 0x00` | `[0, gasPrice]` | Pushes memory offset 0 | | 0x03 | `52` | `MSTORE` | `[]` | Stores gasPrice at memory[0:32] | | 0x04 | `60 20` | `PUSH1 0x20` | `[32]` | Pushes 32 (0x20) - the size in bytes | | 0x06 | `60 00` | `PUSH1 0x00` | `[0, 32]` | Pushes memory offset 0 | | 0x08 | `a0` | `LOG0` | `[]` | Emits anonymous log from memory[0:32] | As intended, the test behaves like this: ``` fail cd86616 Fix CIP-64 gas price opcode (#106) fail 9d02406 CIP-64: actual GASPRICE opcode fix (#107) pass (the missing revert has no effect on the returned gas price) 7be19b3 Revert bad fix for GASPRICE opcode (#109) pass ``` So if we had the test before doing the changes, we would have correctly rejected the wrong fix. * Fix typos Co-authored-by: Paul Lange <palango@users.noreply.github.com> --------- Co-authored-by: Paul Lange <palango@users.noreply.github.com>
karlb
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Dec 8, 2025
* Bump hokulea to v1.0.3 which fixed the maximal blob size from 4MiB to maximal 2^28 MiB (#105) * Fix CIP-64 gas price opcode (#106) * CIP-64: GASPRICE opcode must return effective gas price * Add fixtures including CIP-64 tx with GASPRICE opcode * Remove redundant fixture * CIP-64: actual GASPRICE opcode fix (#107) The previous fix was not correct and only accidentally made the tests pass. The GASPRICE opcodes fetches the effective gas price and passes in the base fee in native tokens. We work around this by calculating the correct effective gas price in advance and ignoring the passed in base fee. * Revert bad fix for GASPRICE opcode (#109) Revert the bad fix in fa7fd99. The correct fix is in 76bad58. * Better CIP-64 GASPRICE opcode test (#111) * Better CIP-64 GASPRICE opcode test The previous test case often passed even with wrong implementations because it only noticed if a single `if` condition on the gas price triggers. Instead, the actual gas price return value should be part of the tested result to notice any deviations from the expected value. This is achieved by emitting the result in an event/log so that it becomes part of the receipt. Full bytecode explanation: | Offset | Bytecode | Opcode | Stack (after) | Description | |--------|----------|--------------|-----------------|------------------------------------------| | 0x00 | `3a` | `GASPRICE` | `[gasPrice]` | Pushes the tx's gas price onto the stack | | 0x01 | `60 00` | `PUSH1 0x00` | `[0, gasPrice]` | Pushes memory offset 0 | | 0x03 | `52` | `MSTORE` | `[]` | Stores gasPrice at memory[0:32] | | 0x04 | `60 20` | `PUSH1 0x20` | `[32]` | Pushes 32 (0x20) - the size in bytes | | 0x06 | `60 00` | `PUSH1 0x00` | `[0, 32]` | Pushes memory offset 0 | | 0x08 | `a0` | `LOG0` | `[]` | Emits anonymous log from memory[0:32] | As intended, the test behaves like this: ``` fail cd86616 Fix CIP-64 gas price opcode (#106) fail 9d02406 CIP-64: actual GASPRICE opcode fix (#107) pass (the missing revert has no effect on the returned gas price) 7be19b3 Revert bad fix for GASPRICE opcode (#109) pass ``` So if we had the test before doing the changes, we would have correctly rejected the wrong fix. * Fix typos Co-authored-by: Paul Lange <palango@users.noreply.github.com> --------- Co-authored-by: Paul Lange <palango@users.noreply.github.com> --------- Co-authored-by: Seola Oh <osa8361@gmail.com> Co-authored-by: Paul Lange <palango@users.noreply.github.com>
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