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fix an incompatibility between our implementation of is_unpendable and utreexo's #170

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Jun 8, 2024
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fix an incompatibility between our implementation of is_unpendable and utreexo's #170

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16 changes: 15 additions & 1 deletion crates/floresta-chain/src/pruned_utreexo/consensus.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@ use bitcoin::pow::U256;
use bitcoin::Block;
use bitcoin::BlockHash;
use bitcoin::OutPoint;
use bitcoin::ScriptBuf;
use bitcoin::Target;
use bitcoin::Transaction;
use bitcoin::TxOut;
Expand Down Expand Up @@ -228,10 +229,11 @@ impl Consensus {
block_inputs.insert((input.previous_output.txid, input.previous_output.vout));
}
}

// Get all leaf hashes that will be added to the accumulator
for transaction in block.txdata.iter() {
for (i, output) in transaction.output.iter().enumerate() {
if !output.script_pubkey.is_provably_unspendable()
if !Self::is_unspendable(&output.script_pubkey)
&& !block_inputs.contains(&(transaction.txid(), i as u32))
{
leaf_hashes.push(Self::get_leaf_hashes(
Expand All @@ -252,4 +254,16 @@ impl Consensus {
let acc = acc.modify(&hashes, &del_hashes, &proof)?.0;
Ok(acc)
}

fn is_unspendable(script: &ScriptBuf) -> bool {
if script.len() > 10_000 {
return true;
}

if !script.is_empty() && script.as_bytes()[0] == 0x6a {
return true;
}

false
}
}
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