31 lines
768 B
JavaScript
31 lines
768 B
JavaScript
const ethSigUtil = require('eth-sig-util');
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const EIP712Domain = [
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{ name: 'name', type: 'string' },
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{ name: 'version', type: 'string' },
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{ name: 'chainId', type: 'uint256' },
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{ name: 'verifyingContract', type: 'address' },
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];
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const Permit = [
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{ name: 'owner', type: 'address' },
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{ name: 'spender', type: 'address' },
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{ name: 'value', type: 'uint256' },
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{ name: 'nonce', type: 'uint256' },
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{ name: 'deadline', type: 'uint256' },
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];
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async function domainSeparator (name, version, chainId, verifyingContract) {
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return '0x' + ethSigUtil.TypedDataUtils.hashStruct(
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'EIP712Domain',
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{ name, version, chainId, verifyingContract },
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{ EIP712Domain },
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).toString('hex');
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}
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module.exports = {
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EIP712Domain,
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Permit,
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domainSeparator,
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};
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