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use crate::*;
#[derive(Debug, Copy, Clone, PartialEq, Eq, Deserialize, Serialize)]
pub struct SourceV10 {
pub id: SourceIdV10,
pub amount: SourceAmount,
}
#[derive(Debug, Copy, Clone, PartialEq, Eq, Deserialize, Serialize)]
pub enum SourceIdV10 {
Ud(UdSourceIdV10),
Utxo(UtxoIdV10),
}
#[derive(Debug, Copy, Clone, PartialEq, Eq, Deserialize, Serialize)]
pub struct UdSourceIdV10 {
pub issuer: PublicKey,
pub block_number: BlockNumber,
}
#[derive(Debug, Copy, Clone, PartialEq, Eq, Deserialize, Serialize)]
pub struct UtxoIdV10 {
pub tx_hash: Hash,
pub output_index: usize,
}
impl std::fmt::Display for UtxoIdV10 {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}:{}", self.tx_hash, self.output_index)
}
}
#[derive(Clone, Copy, Debug, Error, PartialEq)]
pub enum SourceV10NotUnlockableError {
#[error("{0}")]
ScriptNeverUnlockable(ScriptNeverUnlockableError),
#[error("Too long signer index: {0}")]
TooLongSignerIndex(usize),
#[error("Too many proofs: found {found}, used {used}")]
TooManyProofs { found: usize, used: usize },
}
impl SourceV10 {
pub fn unlockable_on(
tx_signers: &[PublicKey],
proofs: &[WalletUnlockProofV10],
source_written_on: u64,
utxo_script: &WalletScriptV10,
) -> Result<u64, SourceV10NotUnlockableError> {
let mut input_signers = HashSet::with_capacity(proofs.len());
let mut codes_hash = HashSet::with_capacity(proofs.len());
for proof in proofs {
match proof {
WalletUnlockProofV10::Sig(tx_signers_index) => {
if *tx_signers_index >= tx_signers.len() {
return Err(SourceV10NotUnlockableError::TooLongSignerIndex(
*tx_signers_index,
));
} else {
input_signers.insert(&tx_signers[*tx_signers_index].as_ref()[..32]);
}
}
WalletUnlockProofV10::Xhx(code) => {
codes_hash.insert(Hash::compute_str(code));
}
}
}
let (script_unlockable_on, used_proofs) = utxo_script
.unlockable_on(&input_signers, &codes_hash, source_written_on)
.map_err(SourceV10NotUnlockableError::ScriptNeverUnlockable)?;
if used_proofs.len() < proofs.len() {
Err(SourceV10NotUnlockableError::TooManyProofs {
found: proofs.len(),
used: used_proofs.len(),
})
} else {
Ok(script_unlockable_on)
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use dubp_common::crypto::keys::PublicKey as _;
use unwrap::unwrap;
#[inline(always)]
fn pk(pk_b58: &str) -> PublicKey {
unwrap!(PublicKey::from_base58(pk_b58))
}
#[test]
fn test_source_unlockable_on_invariant_with_leading_1() {
let p43 = pk("XoFs76G4yidvVY3FZBwYyLXTMjabryhFD8mNQPkQKHk");
let p43_with_leading_1 = pk("1XoFs76G4yidvVY3FZBwYyLXTMjabryhFD8mNQPkQKHk");
let script = WalletScriptV10::single(WalletConditionV10::Sig(p43));
let script_with_leading_1 =
WalletScriptV10::single(WalletConditionV10::Sig(p43_with_leading_1));
let proofs = vec![WalletUnlockProofV10::Sig(0)];
assert_eq!(
Ok(0),
SourceV10::unlockable_on(&[p43_with_leading_1], &proofs, 0, &script)
);
assert_eq!(
Ok(0),
SourceV10::unlockable_on(&[p43], &proofs, 0, &script_with_leading_1)
);
}
#[test]
fn test_source_unlockable_on() {
let p1 = pk("D7CYHJXjaH4j7zRdWngUbsURPnSnjsCYtvo6f8dvW3C");
let p2 = pk("42jMJtb8chXrpHMAMcreVdyPJK7LtWjEeRqkPw4eSEVp");
let script = WalletScriptV10::or(WalletConditionV10::Sig(p1), WalletConditionV10::Sig(p2));
let signers = vec![p1, p2];
let proofs = vec![WalletUnlockProofV10::Sig(0), WalletUnlockProofV10::Sig(1)];
assert_eq!(
Err(SourceV10NotUnlockableError::TooManyProofs { found: 2, used: 1 }),
SourceV10::unlockable_on(&signers, &proofs, 0, &script)
);
assert_eq!(
Err(SourceV10NotUnlockableError::TooLongSignerIndex(2)),
SourceV10::unlockable_on(&signers, &[WalletUnlockProofV10::Sig(2)], 0, &script)
);
assert_eq!(
Err(SourceV10NotUnlockableError::ScriptNeverUnlockable(
ScriptNeverUnlockableError
)),
SourceV10::unlockable_on(&signers, &[], 0, &script)
);
assert_eq!(
Ok(0),
SourceV10::unlockable_on(&signers, &[WalletUnlockProofV10::Sig(1)], 0, &script)
);
}
}