bp-dbc 0.12.0

// Deterministic bitcoin commitments library.
//
// SPDX-License-Identifier: Apache-2.0
//
// Written in 2019-2024 by
//     Dr Maxim Orlovsky <orlovsky@lnp-bp.org>
//
// Copyright (C) 2019-2024 LNP/BP Standards Association. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use bc::Tx;
use commit_verify::mpc::Commitment;
use commit_verify::{EmbedCommitProof, EmbedCommitVerify, EmbedVerifyError};

use super::{OpretError, OpretFirst, OpretProof};

impl EmbedCommitProof<Commitment, Tx, OpretFirst> for OpretProof {
    fn restore_original_container(
        &self,
        commit_container: &Tx,
    ) -> Result<Tx, EmbedVerifyError<OpretError>> {
        let mut tx = commit_container.clone();
        for txout in &mut tx.outputs {
            if txout.script_pubkey.is_op_return() {
                *txout = self.restore_original_container(txout)?;
                return Ok(tx);
            }
        }
        Err(OpretError::NoOpretOutput.into())
    }
}

impl EmbedCommitVerify<Commitment, OpretFirst> for Tx {
    type Proof = OpretProof;
    type CommitError = OpretError;

    fn embed_commit(&mut self, msg: &Commitment) -> Result<Self::Proof, Self::CommitError> {
        for txout in &mut self.outputs {
            if txout.script_pubkey.is_op_return() {
                return txout.script_pubkey.embed_commit(msg);
            }
        }
        Err(OpretError::NoOpretOutput)
    }
}