HectorAE/hw-app-ckb

Github, Ledger Devs Slack

@obsidiansystems/hw-app-ckb

Ledger Hardware Wallet CKB JavaScript bindings.

Using LedgerJS for CKB

Here is a sample app for Node:

let Transport = require("@ledgerhq/hw-transport-node-hid").default;
let Ckb = require("@obsidiansystems/hw-app-ckb").default;

const getWalletId = async () => {
  const transport = await Transport.create();
  const ckb = new Ckb(transport);
  const result = await ckb.getWalletId();
  return result;
};

const signTransaction = async () => {
  const transport = await Transport.create();
  const ckb = new Ckb(transport);
  contexts = [ "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"
             , "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" ];
  transaction = "d00100000c000000bc010000b00100001c000000200000006e00000072000000ce0000009c0100000000000002000000a563884b3686078ec7e7677a5f86449b15cf2693f3c1241766c6996f206cc5410200000000ace5ea83c478bb866edf122ff862085789158f5cbff155b7bb5f13058555b708000000000100000000020000000000000000000000b1b547956a0dfb7ea618231563b3acd23607586e939f88e5a6db5f392b2e78d5010000000000000000000000258e82bab2af21fd8899fc872742f4acea831f5e4c232297816b9bf4a19597a900000000ce0000000c0000006d0000006100000010000000180000006100000000e8764817000000490000001000000030000000310000009bd7e06f3ecf4be0f2fcd2188b23f1b9fcc88e5d4b65a8637b17723bbda3cce80114000000e5260d839a786ac2a909181df9a423f1efbe863d61000000100000001800000061000000e91c708e17000000490000001000000030000000310000009bd7e06f3ecf4be0f2fcd2188b23f1b9fcc88e5d4b65a8637b17723bbda3cce80114000000e5260d839a786ac2a909181df9a423f1efbe863d140000000c000000100000000000000000000000140000000c000000100000000000000000000000"
  const result = await ckb.signTransaction("44'/309'/0'/1/0", transaction, null, contexts, "44'/309'/0'/1/0");
  return result;
};

const getVersion = async () => {
  const transport = await Transport.create();
  const ckb = new Ckb(transport);
  const versionInfo = await ckb.getAppConfiguration();
  return versionInfo;
};

const getAddress = async () => {
  const transport = await Transport.create();
  const ckb = new Ckb(transport);
  const result = await ckb.getWalletPublicKey("44'/309'/0'/1/0");
  return result;
};

const doAll = async () => {
    walletId = await getWalletId();
    console.log(walletId);
    version = await getVersion();
    console.log(version);
    address = await getAddress();;
    console.log(address);
    signature = await signTransaction();
    console.log(signature);
};

doAll().catch(err => console.log(err));

API

Table of Contents

• Ckb
  • Parameters
  • Examples
  • getWalletPublicKey
    • Parameters
    • Examples
  • getWalletExtendedPublicKey
    • Parameters
    • Examples
  • signTransaction
    • Parameters
    • Examples
  • buildAnnotatedTransaction
    • Parameters
  • signAnnotatedTransaction
    • Parameters
  • defaultSighashWitness
  • getAppConfiguration
    • Examples
  • getWalletId
    • Examples

Ckb

Nervos API

Parameters

• transport Transport<any>
• scrambleKey string (optional, default "CKB")

Examples

import Ckb from "@obsidiansystems/hw-app-ckb";
const ckb = new Ckb(transport);

getWalletPublicKey

get CKB address for a given BIP 32 path.

Parameters

• path string a path in BIP 32 format
• testnet boolean

Examples

const result = await ckb.getWalletPublicKey("44'/144'/0'/0/0");
const publicKey = result.publicKey;
const lockArg = result.lockArg;
const address = result.address;

Returns Promise<string> an object with a publicKey, lockArg, and (secp256k1+blake160) address.

getWalletExtendedPublicKey

get extended public key for a given BIP 32 path.

Parameters

• path string a path in BIP 32 format

Examples

const result = await ckb.getWalletPublicKey("44'/144'/0'/0/0");
const publicKey = result;

Returns Promise<string> an object with a publicKey

signTransaction

Sign a Nervos transaction with a given BIP 32 path

Parameters

• signPath (string | BIPPath | [number]) the path to sign with, in BIP 32 format
• rawTx (string | blockchain.RawTransactionJSON)
• groupWitnessesHex [string]? hex of in-group and extra witnesses to include in signature
• rawContextsTx [(string | blockchain.RawTransactionJSON)]
• changePath (string | BIPPath | [number]) the path the transaction sends change to, in BIP 32 format (optional, defaults to signPath)
• rawTxHex transaction to sign
• contextTransaction list of transaction contexts for parsing

Examples

TODO

Returns Promise<string> a signature as hex string

buildAnnotatedTransaction

Construct an AnnotatedTransaction for a given collection of signing data

Parameters are the same as for signTransaction, but no ledger interaction is attempted.

AnnotatedTransaction is a type defined for the ledger app that collects all of the information needed to securely confirm a transaction on-screen and a few bits of duplicative information to allow it to be processed as a stream.

Parameters

• signPath (string | BIPPath | [number])
• rawTx (string | RawTransactionJSON)
• groupWitnesses [string]?
• rawContextsTx [(string | RawTransactionJSON)]
• changePath (string | BIPPath | [number])

Returns AnnotatedTransactionJSON

signAnnotatedTransaction

Sign an already constructed AnnotatedTransaction.

Parameters

• tx (AnnotatedTransaction | AnnotatedTransactionJSON)

Returns Promise<string>

defaultSighashWitness

An empty WitnessArgs with enough space to fit a sighash signature into.

getAppConfiguration

Get the version of the Nervos app installed on the hardware device

Examples

const result = await ckb.getAppConfiguration();

{
  "version": "1.0.3",
  "hash": "0000000000000000000000000000000000000000"
}

Returns Promise<{version: string, hash: string}> an object with a version

getWalletId

Get the wallet identifier for the Ledger wallet

Examples

const id = await ckb.getWalletId();

"0x69c46b6dd072a2693378ef4f5f35dcd82f826dc1fdcc891255db5870f54b06e6"

Returns Promise<string> a byte string