viem
Version:
31 lines • 1.27 kB
JavaScript
import { secp256k1 } from '@noble/curves/secp256k1';
import { hexToBigInt } from '../encoding/fromHex.js';
import { hexToBytes } from '../encoding/toBytes.js';
/**
* @description Converts a signature into hex format.
*
* @param signature The signature to convert.
* @returns The signature in hex format.
*
* @example
* serializeSignature({
* r: '0x6e100a352ec6ad1b70802290e18aeed190704973570f3b8ed42cb9808e2ea6bf',
* s: '0x4a90a229a244495b41890987806fcbd2d5d23fc0dbe5f5256c2613c039d76db8',
* yParity: 1
* })
* // "0x6e100a352ec6ad1b70802290e18aeed190704973570f3b8ed42cb9808e2ea6bf4a90a229a244495b41890987806fcbd2d5d23fc0dbe5f5256c2613c039d76db81c"
*/
export function serializeSignature({ r, s, to = 'hex', v, yParity, }) {
const yParity_ = (() => {
if (yParity === 0 || yParity === 1)
return yParity;
if (v && (v === 27n || v === 28n || v >= 35n))
return v % 2n === 0n ? 1 : 0;
throw new Error('Invalid `v` or `yParity` value');
})();
const signature = `0x${new secp256k1.Signature(hexToBigInt(r), hexToBigInt(s)).toCompactHex()}${yParity_ === 0 ? '1b' : '1c'}`;
if (to === 'hex')
return signature;
return hexToBytes(signature);
}
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