56 lines
1.0 KiB
TypeScript
56 lines
1.0 KiB
TypeScript
import { Contract, providers, utils } from "ethers";
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const spec = {
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magicValue: "0x1626ba7e",
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abi: [
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{
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constant: true,
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inputs: [
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{
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name: "_hash",
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type: "bytes32",
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},
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{
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name: "_sig",
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type: "bytes",
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},
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],
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name: "isValidSignature",
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outputs: [
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{
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name: "magicValue",
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type: "bytes4",
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},
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],
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payable: false,
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stateMutability: "view",
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type: "function",
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},
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],
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};
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async function isValidSignature(
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address: string,
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sig: string,
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data: string,
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provider: providers.Provider,
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abi = eip1271.spec.abi,
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magicValue = eip1271.spec.magicValue,
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): Promise<boolean> {
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let returnValue;
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try {
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returnValue = await new Contract(address, abi, provider).isValidSignature(
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utils.arrayify(data),
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sig,
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);
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} catch (e) {
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return false;
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}
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return returnValue.toLowerCase() === magicValue.toLowerCase();
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}
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export const eip1271 = {
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spec,
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isValidSignature,
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};
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