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working on escrow descriptor

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This commit is contained in:
fbock
2024-08-12 11:09:40 +02:00
parent 49b5ea1d87
commit ae2e82aca5
1 changed files with 18 additions and 15 deletions
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33
taptrade-cli-demo/coordinator/src/wallet/escrow_psbt.rs
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@ -6,7 +6,9 @@ use bdk::{
miniscript::{descriptor::TapTree, policy::Concrete, Tap}, miniscript::{descriptor::TapTree, policy::Concrete, Tap},
SignOptions, SignOptions,
}; };
use bitcoin::PublicKey;
use musig2::{secp256k1::PublicKey as MuSig2PubKey, KeyAggContext}; use musig2::{secp256k1::PublicKey as MuSig2PubKey, KeyAggContext};
use sha2::digest::typenum::bit;
#[derive(Debug)] #[derive(Debug)]
pub struct EscrowPsbtConstructionData { pub struct EscrowPsbtConstructionData {
@ -37,7 +39,7 @@ impl EscrowPsbtConstructionData {
pub fn aggregate_musig_pubkeys( pub fn aggregate_musig_pubkeys(
maker_musig_pubkey: &str, maker_musig_pubkey: &str,
taker_musig_pubkey: &str, taker_musig_pubkey: &str,
) -> Result<String> { ) -> Result<bdk::bitcoin::PublicKey> {
debug!( debug!(
"Aggregating musig pubkeys: {} and {}", "Aggregating musig pubkeys: {} and {}",
maker_musig_pubkey, taker_musig_pubkey maker_musig_pubkey, taker_musig_pubkey
@ -49,8 +51,9 @@ pub fn aggregate_musig_pubkeys(
let key_agg_ctx = KeyAggContext::new(pubkeys).context("Error aggregating musig pubkeys")?; let key_agg_ctx = KeyAggContext::new(pubkeys).context("Error aggregating musig pubkeys")?;
let agg_pk: MuSig2PubKey = key_agg_ctx.aggregated_pubkey(); let agg_pk: MuSig2PubKey = key_agg_ctx.aggregated_pubkey();
let bitcoin_pk = bdk::bitcoin::PublicKey::from_slice(&agg_pk.serialize())
Ok(agg_pk.to_string()) .context("Error converting musig pk to bitcoin pk")?;
Ok(bitcoin_pk)
} }
pub fn build_escrow_transaction_output_descriptor( pub fn build_escrow_transaction_output_descriptor(
@ -103,22 +106,22 @@ pub fn build_escrow_transaction_output_descriptor(
let tap_node_ef = TapTree::Tree(Arc::new(tap_leaf_e), Arc::new(tap_leaf_f)); let tap_node_ef = TapTree::Tree(Arc::new(tap_leaf_e), Arc::new(tap_leaf_f));
// Create the TapTree (example combining leaves, adjust as necessary), will be used for Script Path Spending (Alternative Spending Paths) in the descriptor // Create the TapTree (example combining leaves, adjust as necessary), will be used for Script Path Spending (Alternative Spending Paths) in the descriptor
let final_tap_tree = TapTree::Tree(Arc::new(tap_node_cd), Arc::new(tap_node_ef)); let final_tap_tree =
TapTree::<bdk::bitcoin::PublicKey>::Tree(Arc::new(tap_node_cd), Arc::new(tap_node_ef));
// An internal key, that defines the way to spend the transaction directly, using Key Path Spending // An internal key, that defines the way to spend the transaction directly, using Key Path Spending
let internal_agg_musig_key = aggregate_musig_pubkeys( let internal_agg_musig_key: bdk::bitcoin::PublicKey = aggregate_musig_pubkeys(
&maker_escrow_data.musig_pubkey_compressed_hex, &maker_escrow_data.musig_pubkey_compressed_hex,
&taker_escrow_data.musig_pubkey_compressed_hex, &taker_escrow_data.musig_pubkey_compressed_hex,
)?; )?;
// Create the descriptor // Create the descriptor
let descriptor = Descriptor::new_tr(internal_agg_musig_key, Some(final_tap_tree)) let descriptor =
.context("Error assembling escrow output descriptor")?; Descriptor::<bdk::bitcoin::PublicKey>::new_tr(internal_agg_musig_key, Some(final_tap_tree))
.context("Error assembling escrow output descriptor")?;
descriptor.sanity_check()?; descriptor.sanity_check()?;
// let descriptor = miniscript::Descriptor::<bitcoin::PublicKey>::from_str(&descriptor).unwrap();
// https://docs.rs/miniscript/latest/miniscript/ // https://docs.rs/miniscript/latest/miniscript/
// debug!("Escrow descriptor: {}", descriptor.address(network));
debug!("Escrow descriptor: {}", descriptor);
Ok(descriptor.to_string()) Ok(descriptor.to_string())
} }
@ -165,13 +168,13 @@ impl<D: bdk::database::BatchDatabase> CoordinatorWallet<D> {
bitcoin::Network::Regtest, bitcoin::Network::Regtest,
MemoryDatabase::new(), MemoryDatabase::new(),
)?; )?;
let escrow_address = temp_wallet // let escrow_address = temp_wallet
.get_address(bdk::wallet::AddressIndex::New)? // .get_address(bdk::wallet::AddressIndex::New)?
.address; // .address;
// dummy escrow address for testing the psbt signing flow // dummy escrow address for testing the psbt signing flow
// let escrow_address = let escrow_address =
// Address::from_str(self.get_new_address().await?.as_str())?.assume_checked(); Address::from_str(self.get_new_address().await?.as_str())?.assume_checked();
// using absolute fee for now, in production we should come up with a way to determine the tx weight // using absolute fee for now, in production we should come up with a way to determine the tx weight
// upfront and substract the fee from the change outputs (10k == ~30/sat vbyte) // upfront and substract the fee from the change outputs (10k == ~30/sat vbyte)