also return the response after onFinish

[devlz303]

Instead of (only) using the onFinish also return the response so you don't have to use the onFinish / onCancel callbacks and you can just await the response.

For example:

const signPsbtOptions = {
  payload: {
    network: {
      type:'Mainnet'
    },
    message: 'Sign Transaction',
    psbtBase64: `cHNidP8BAJwCAmO+JvQJxhVDDpm3tV5PmPfzvJOSL4GOdjEOpAAAAAAnrAAA==`,
    broadcast: false,
    inputsToSign: [{
        address: "33TKH4kkiFPyTLDNmdNsLggyLeAYre57Qm",
        signingIndexes: [1],
    }],
  },
}

const response = await signTransaction(signPsbtOptions); // response is returned from signTransaction