c46f0353d1
* Update ERC721 to latest 1.11.0 from OpenZeppelin-solidity * Hardcode supported interfaces instead of using lookup table. This avoids shifting storage when extending supports interface. * Update build artifacts * Fix linter errors
22 lines
583 B
JavaScript
22 lines
583 B
JavaScript
import { soliditySha3 } from 'web3-utils';
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const INTERFACE_ID_LENGTH = 4;
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export default (interfaces = []) => {
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const interfaceIdBuffer = interfaces
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.map(methodSignature => soliditySha3(methodSignature)) // keccak256
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.map(h =>
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Buffer
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.from(h.substring(2), 'hex')
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.slice(0, 4) // bytes4()
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)
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.reduce((memo, bytes) => {
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for (let i = 0; i < INTERFACE_ID_LENGTH; i++) {
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memo[i] = memo[i] ^ bytes[i]; // xor
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}
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return memo;
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}, Buffer.alloc(INTERFACE_ID_LENGTH));
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return `0x${interfaceIdBuffer.toString('hex')}`;
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};
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