40 lines
1.4 KiB
JavaScript
40 lines
1.4 KiB
JavaScript
let elliptic = require('elliptic');
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const web3Utils = require("web3-utils");
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const guardianKey = "beFA429d57cD18b7F8A4d91A2da9AB4AF05d0FBe";
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const guardianPrivKeys = "cfb12303a19cde580bb4dd771639b0d26bc68353645571a8cff516ab2ee113a0";
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let ec = new elliptic.ec('secp256k1');
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let keyPair = ec.keyFromPrivate(guardianPrivKeys);
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let privKey = keyPair.getPrivate("hex");
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let pubKey = keyPair.getPublic();
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console.log(`Private key: ${privKey}`);
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console.log("Public key :", pubKey.encode("hex"))
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//console.log("Public key (compressed):", pubKey.encodeCompressed("hex"));
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let msg = 'Message for signing';
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let msgHash = web3Utils.keccak256(msg).substr(2);
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let signature = keyPair.sign(msgHash, { canonical: true });
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console.log(`Msg: ${msg}`);
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console.log(`Msg hash: ${msgHash}`);
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console.log("Signature:", signature);
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console.log();
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let hexToDecimal = (x) => ec.keyFromPrivate(x, "hex").getPrivate().toString(10);
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let pubKeyRecovered = ec.recoverPubKey(hexToDecimal(msgHash), signature, signature.recoveryParam, "hex");
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pk = pubKeyRecovered.encode("hex")
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console.log("Public key :", pubKey.encode("hex").substring(2, 130));
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console.log("Recovered pubKey:", pk);
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console.log("keccak256 :", web3Utils.keccak256("0x" + pk.substring(2, 130)).substring(26))
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console.log("guardianKey:", guardianKey);
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let validSig = ec.verify(msgHash, signature, pubKeyRecovered);
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console.log("Signature valid?", validSig);
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