ETHSignature

The ETHSignature class represents an Ethereum signature.

Used to parse the signed result returned by the device.

Parameters

• signature: Buffer The signature data.

• requestId: Buffer The request ID, optional.

• origin: string The origin information, optional.

URL Example

UR:ETH-SIGNATURE/OTADTPDAGDSWNNYAHGTOKPFPIAPANNROLNSAVYDTHHAOHDFPCATKCPPFYLENGAGLMKMUCAYKFPFSDREOMENTPKBGEONDCHFDNBKOSSTPDWETSGBZDNCMCHKPNYDMKIDPTDRYJSDRTKCTIOFPQZHFLNSKVACLMNIYTKLGISFRWLKTZTREAEAXIYGWJTIHGRIHKKPLGDEEDS

Example (decoding)

import { URDecoder } from '@ngraveio/bc-ur';
import { EthSignature } from '@keystonehq/bc-ur-registry-eth';

const dec = new URDecoder();
// push each scanned frame string into the decoder
// dec.receivePart(frame)

if (dec.isComplete()) {
  const ur = dec.resultUR(); // ur.type should be 'eth-signature'
  const sig = EthSignature.fromCBOR(ur.cbor);
  const requestId = sig.getRequestId();
  const signature = sig.getSignature();
  const r = signature.slice(0, 32);
  const s = signature.slice(32, 64);
  const v = signature.slice(64, 65);
}