aquavm/interpreter-lib/src/aqua.rs

/*
 * Copyright 2020 Fluence Labs Limited
 *
 * 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.
 */

mod outcome;

use crate::execution::ExecutableInstruction;
use crate::preparation::prepare;
use crate::preparation::PreparationDescriptor;

use aqua_interpreter_interface::InterpreterOutcome;

pub fn execute_aqua(init_peer_id: String, aqua: String, prev_data: Vec<u8>, data: Vec<u8>) -> InterpreterOutcome {
    use std::convert::identity;

    log::trace!(
        "aquamarine version is {}, init user id is {}",
        env!("CARGO_PKG_VERSION"),
        init_peer_id
    );

    execute_aqua_impl(init_peer_id, aqua, prev_data, data).unwrap_or_else(identity)
}

fn execute_aqua_impl(
    init_peer_id: String,
    aqua: String,
    prev_data: Vec<u8>,
    data: Vec<u8>,
) -> Result<InterpreterOutcome, InterpreterOutcome> {
    let PreparationDescriptor {
        mut exec_ctx,
        mut trace_ctx,
        aqua,
    } = prepare(&prev_data, &data, aqua.as_str(), init_peer_id)
        // return the initial data in case of errors
        .map_err(|e| outcome::from_preparation_error(data, e))?;

    aqua.execute(&mut exec_ctx, &mut trace_ctx)
        // return new collected trace in case of errors
        .map_err(|e| outcome::from_execution_error(&trace_ctx.new_trace, exec_ctx.next_peer_pks.clone(), e))?;

    let outcome = outcome::from_path_and_peers(&trace_ctx.new_trace, exec_ctx.next_peer_pks);

    Ok(outcome)
}