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Commitment for confirmation transaction is not random

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This commit is contained in:
Sosthene 2024-05-27 11:57:56 +02:00
parent f52dca8db7
commit d82a1c7624
1 changed files with 18 additions and 8 deletions
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26
src/silentpayments.rs
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@ -1,14 +1,16 @@
use std::collections::HashMap;
use std::io::Write;
use std::str::FromStr;
use anyhow::{Error, Result};
use rand::{thread_rng, Rng, RngCore};
use rand::{thread_rng, Rng};
use sp_client::bitcoin::hashes::{sha256, Hash};
use sp_client::bitcoin::hex::FromHex;
use sp_client::bitcoin::psbt::raw;
use sp_client::bitcoin::{Psbt, Transaction};
use sp_client::bitcoin::{Psbt, Transaction, Txid};
use sp_client::bitcoin::{Amount, OutPoint};
use sp_client::bitcoin::consensus::{deserialize, serialize};
use sp_client::bitcoin::consensus::deserialize;
use sp_client::silentpayments::sending::SilentPaymentAddress;
use sp_client::spclient::{OwnedOutput, Recipient, SpClient, SpWallet};
use sp_client::constants;
@ -74,6 +76,7 @@ pub fn create_transaction_spend_outpoint(
outpoint: &OutPoint,
sp_wallet: &SpWallet,
mut recipient: Recipient,
commited_in_txid: &Txid,
fee_rate: Amount
) -> Result<Psbt> {
let available_outpoints = sp_wallet.get_outputs().to_spendable_list();
@ -99,18 +102,25 @@ pub fn create_transaction_spend_outpoint(
// update the amount for the recipient
recipient.amount = total_available;
// create a dummy commitment
// 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];
thread_rng().fill_bytes(&mut buf);
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 new_psbt = sp_wallet.get_client().create_new_psbt(
inputs,
vec![recipient],
Some(&buf),
Some(hash.as_byte_array()),
)?;
let change_addr = sp_wallet.get_client().sp_receiver.get_change_address();
SpClient::set_fees(&mut new_psbt, fee_rate, change_addr)?;
SpClient::set_fees(&mut new_psbt, fee_rate, address)?;
let partial_secret = sp_wallet
.get_client()