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Update EIP-7761: reference 3540 explicitly #8875

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Sep 11, 2024
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Update EIP-7761: reference 3540 explicitly #8875

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2 changes: 1 addition & 1 deletion EIPS/eip-7761.md
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Expand Up @@ -17,7 +17,7 @@ Allow EOF contracts to discriminate between EOAs (Externally Owned Accounts) and

## Motivation

EOFv1 as scoped in [EIP-7692](./eip-7692.md) removes code introspection capabilities from the EVM, including the `EXTCODESIZE` instruction. This makes it hard for [ERC-721](./eip-721.md) and [ERC-1155](./eip-1155.md) standard contracts to be implemented, as they rely on discovering whether a token's `safeTransfer` call target was an EOA or a contract account:
EOFv1 as scoped in [EIP-7692](./eip-7692.md) removes code introspection capabilities from the EVM, including the `EXTCODESIZE` instruction (in [EIP-3540](./eip-3540.md)). This makes it hard for [ERC-721](./eip-721.md) and [ERC-1155](./eip-1155.md) standard contracts to be implemented, as they rely on discovering whether a token's `safeTransfer` call target was an EOA or a contract account:

- `safeTransfers` to EOAs succeed
- `safeTransfers` to contract accounts call an `onERC721Received` (`onERC1155Received`) on them and expect to get a special magic return value, otherwise the transfer reverts (on the assumption that such a receipient may not be able to interact with the token)
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