fix(token): Match ERC20Wrapper decimals behavior to Solidity (#638) #640
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Updated the `decimals` method in `Erc20Wrapper` to attempt a call to the underlying token's `decimals()` function using a fixed selector. If the call fails or returns unexpected data, it falls back to the wrapper's stored decimals. This improves the robustness of the decimals retrieval process.
knelsondev
requested review from
bidzyyys,
qalisander and
0xNeshi
as code owners
✅ Deploy Preview for contracts-stylus canceled.
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hey @0xNeshi I have been working on it since I saw the issue raised, can you please review it and let me know. |
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Thanks @knelsondev , we'll be reviewing the PR when we free up our backlog a bit |
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Hi, @0xNeshi any update with this one? |
bidzyyys
reviewed
May 27, 2025
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Updated the
Updates the `decimals` method in `Erc20Wrapper` to align its behavior with the Solidity `ERC20Wrapper` implementation, as requested in issue #638.decimalsmethod inErc20Wrapperto attempt a call to the underlying token'sdecimals()function using a fixed selector. If the call fails or returns unexpected data, it falls back to the wrapper's stored decimals. This improves the robustness of the decimals retrieval process.The method now first attempts to call the
decimals()function on the underlying token contract using the standard selector (0x313ce567). If this external call succeeds and returns a validuint8value, that value is returned. If the call fails (e.g., the underlying token does not implementdecimalsor the call reverts) or returns improperly formatted data, the method falls back to returning the wrapper contract's own configured decimals value (underlying_decimals).This ensures parity with the reference OpenZeppelin Solidity contracts and improves compatibility.
Resolves #638
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