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Add optional payload to create_transaction_spend_outpoint

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This commit is contained in:
Sosthene 2024-06-27 17:19:04 +02:00
parent b648ed9ada
commit a1cfba63ff
1 changed files with 21 additions and 9 deletions
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30
src/silentpayments.rs
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@ -77,6 +77,7 @@ pub fn create_transaction_spend_outpoint(
sp_wallet: &SpWallet,
mut recipient: Recipient,
commited_in_txid: &Txid,
payload: Option<Vec<u8>>,
fee_rate: Amount
) -> Result<Psbt> {
let available_outpoints = sp_wallet.get_outputs().to_spendable_list();
@ -105,19 +106,30 @@ pub fn create_transaction_spend_outpoint(
// Take the recipient address
let address = recipient.address.clone();
// create a dummy commitment that is H(b_scan | commited_in txid)
let mut buf = [0u8;64];
buf[..32].copy_from_slice(commited_in_txid.as_raw_hash().as_byte_array());
buf[32..].copy_from_slice(&sp_wallet.get_client().get_scan_key().secret_bytes());
let mut engine = sha256::HashEngine::default();
engine.write_all(&buf)?;
let hash = sha256::Hash::from_engine(engine);
let mut commitment = [0u8;32];
if let Some(p) = payload {
let mut engine = sha256::HashEngine::default();
engine.write_all(&p)?;
let hash = sha256::Hash::from_engine(engine);
commitment.copy_from_slice(hash.as_byte_array());
} else {
// create a dummy commitment that is H(b_scan | commited_in txid)
let mut buf = [0u8;64];
buf[..32].copy_from_slice(commited_in_txid.as_raw_hash().as_byte_array());
buf[32..].copy_from_slice(&sp_wallet.get_client().get_scan_key().secret_bytes());
let mut engine = sha256::HashEngine::default();
engine.write_all(&buf)?;
let hash = sha256::Hash::from_engine(engine);
commitment.copy_from_slice(hash.as_byte_array());
}
let mut new_psbt = sp_wallet.get_client().create_new_psbt(
inputs,
vec![recipient],
Some(hash.as_byte_array()),
Some(&commitment),
)?;
SpClient::set_fees(&mut new_psbt, fee_rate, address)?;