Tron

Tron offline signing via UR uses the same animated QR transport pattern.

Data Types

Request UR: tron-sign-request
Response UR: tron-signature

Tron helpers are provided by our QR wallet SDK and follow standard UR patterns.

Flow

Construct a Tron sign request (transaction/message + BIP-44 path)
Encode as UR and display as animated QR
Scan device response and decode signature
Broadcast to the Tron network

Examples

Build Tron sign request (UR)


import { TronSignRequest } from '@keystonehq/bc-ur-registry-tron';
import { CryptoKeypath, PathComponent } from '@keystonehq/bc-ur-registry';
import { airGapUrUtils } from '@keystonehq/keystone-sdk';
 
// BIP44: m/44'/195'/0'/0/0
const keypath = new CryptoKeypath([
  new PathComponent({ index: 44, hardened: true }),
  new PathComponent({ index: 195, hardened: true }),
  new PathComponent({ index: 0, hardened: true }),
  new PathComponent({ index: 0, hardened: false }),
  new PathComponent({ index: 0, hardened: false }),
]);
 
const req = new TronSignRequest({
  signData: Buffer.from(rawTxHex, 'hex'),
  derivationPath: keypath,
});
 
const ur = req.toUR();
const frames = airGapUrUtils.urToQrcode(ur);

Decode Tron signature (UR)


import { URDecoder } from '@ngraveio/bc-ur';
import { TronSignature } from '@keystonehq/bc-ur-registry-tron';
 
const dec = new URDecoder();
// dec.receivePart(frameString) for each scanned frame
if (dec.isComplete()) {
  const ur = dec.resultUR();            // 'tron-signature'
  const sig = TronSignature.fromCBOR(ur.cbor);
  const signature = sig.getSignature();
  // broadcast signed transaction to Tron network
}