snarkvm-console-program 4.6.1

// Copyright (c) 2019-2026 Provable Inc.
// This file is part of the snarkVM library.

// 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 crate::{Identifier, ProgramID};
use snarkvm_console_account::ToBits;
use snarkvm_console_algorithms::Result;
use snarkvm_console_network::Network;
use snarkvm_console_types::{Field, U8, U16};

/// Compute the function ID as `Hash(network_id, program_id.len(), program_id, function_name.len(), function_name)`.
pub fn compute_function_id<N: Network>(
    network_id: &U16<N>,
    program_id: &ProgramID<N>,
    function_name: &Identifier<N>,
) -> Result<Field<N>> {
    N::hash_bhp1024(
        &(
            *network_id,
            U8::<N>::new(program_id.name().size_in_bits()),
            program_id.name(),
            U8::<N>::new(program_id.network().size_in_bits()),
            program_id.network(),
            U8::<N>::new(function_name.size_in_bits()),
            function_name,
        )
            .to_bits_le(),
    )
}