PSBT and transactions

UTXO applications should construct transactions carefully, request a signature through Pali, and broadcast only after the user approves.

Sign a PSBT

Pali Wallet

UTXO • Syscoin

PSBT Sign Review

UTXO signing confirmation

Scroll inside the preview to inspect outputs, inputs, size, weight, and lock time.

Pali prompts the user before signing UTXO PSBTs.

const signed = await window.pali.request({
  method: 'sys_sign',
  params: [psbtBase64],
});

Sign and send

const txid = await window.pali.request({
  method: 'sys_signAndSend',
  params: [psbtBase64],
});

Fetch transactions

const transactions = await window.pali.request({
  method: 'sys_getTransactions',
});

const tx = await window.pali.request({
  method: 'sys_transaction',
  params: [txid],
});

Validate an address

const valid = await window.pali.request({
  method: 'sys_isValidSYSAddress',
  params: [address],
});

Dapp responsibility

Pali signs what the user approves. Your application is responsible for constructing sane PSBT inputs, outputs, fees, change, and asset metadata before requesting a signature.

Account selection

Signing is bound to the account connected to the requesting dapp and the approved network. PSBT metadata cannot select another wallet account. If Pali is displaying a different account, it can ask the user to switch to the connected account before approval. To use another account, change the dapp connection and request a new approval.

For a PSBT with unfinished inputs, at least one unfinished input must belong to that approved account. Pali signs only that account's inputs. Shared and multisig transactions can therefore return partially signed; other participants must complete their own inputs or signatures. Existing external signatures and supported finalized inputs are preserved. A completely finalized PSBT can be returned without adding signatures. Hardware-wallet support still depends on the device and transaction format.

A change of account or network invalidates the pending signing context. Rebuild or recheck the request and obtain a fresh approval instead of replaying the old request.