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xermicus
ee869cdd18
- Support solc v0.8.35 - The new `erc7201` is comptime (already translated to a constant in Yul) Didn't spot any relevant breakage or addition in the release notes so should be no-brainer. --------- Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>
56 lines
1.7 KiB
Solidity
56 lines
1.7 KiB
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.35;
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/* runner.json
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{
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"differential": true,
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"actions": [
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{
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"Instantiate": {
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"code": {
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"Solidity": {
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"contract": "ERC7201"
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}
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}
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}
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}
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]
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}
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*/
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/// Tests the `erc7201` builtin introduced in solc 0.8.35.
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/// Reference: https://eips.ethereum.org/EIPS/eip-7201
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contract ERC7201 {
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/// Reference implementation of the ERC-7201 base slot formula in pure
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/// Solidity. Used to cross-check the builtin output.
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function referenceSlot(string memory id) internal pure returns (uint256) {
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return uint256(
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keccak256(bytes.concat(bytes32(uint256(keccak256(bytes(id))) - 1)))
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& ~bytes32(uint256(0xff))
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);
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}
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constructor() payable {
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// Compile-time path: literal argument, solc folds the result into a
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// numeric constant in the emitted Yul.
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assert(erc7201("example.main") == referenceSlot("example.main"));
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assert(
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erc7201("erc7201:openzeppelin.storage.Initializable")
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== referenceSlot("erc7201:openzeppelin.storage.Initializable")
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);
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assert(erc7201("") == referenceSlot(""));
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// Runtime path: non-literal argument, solc emits a Yul utility
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// function that performs the keccak256 hashes at runtime.
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string memory id = "example.main";
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assert(erc7201(id) == referenceSlot(id));
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string memory empty = "";
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assert(erc7201(empty) == referenceSlot(empty));
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// The two paths must agree.
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assert(erc7201("example.main") == erc7201(id));
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}
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}
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