Dfns Wallet for BitcoinJS

Dfns wallet integration with [BitcoinJS]. makes working with Bitcoin ecosystems as simple and painless as possible.

The DfnsWallet uses generateSignature to compute signatures using your Dfns managed wallets. Then you need to broadcast these transactions yourself to the corresponding node providers that are either self hosted or by a blockchain provider.

A typical setup routine looks like this,

import { DfnsWallet } from '@dfns/lib-bitcoinjs'
import { DfnsApiClient } from '@dfns/sdk'
import { AsymmetricKeySigner } from '@dfns/sdk-keysigner'

const signer = new AsymmetricKeySigner({
  privateKey: process.env.DFNS_PRIVATE_KEY!,
  credId: process.env.DFNS_CRED_ID!,
  appOrigin: process.env.DFNS_APP_ORIGIN!,
})

const dfnsClient = new DfnsApiClient({
  appId: process.env.DFNS_APP_ID!,
  authToken: process.env.DFNS_AUTH_TOKEN!,
  baseUrl: process.env.DFNS_API_URL!,
  signer,
})

const wallet = DfnsWallet.init({
  walletId: process.env.DFNS_WALLET_ID!,
  dfnsClient,
})
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Sign PSBT, psbt.signAllInputsAsync(wallet) vs wallet.SignPsbt(psbt)

The Dfns wallet signs bitcoin transactions using the "Partially Signed Bitcoin Transaction" format, or PSBT. There are two ways to sign a PSBT. A transaction can have multiple UTXO inputs, and each UTXO must be signed independently with the Dfns wallet, signing with psbt.signAllInputsAsync(wallet) will result in multiple requests to sign each UTXO separately. It is recommended to instead call wallet.SignPsbt(psbt), and sign the entire Psbt in a single request.

Go checkout the examples we have that showcase how you can start developing dapps with Dfns wallets.