mirror of
https://github.com/mimblewimble/grin.git
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6036b671e8
* fee and lock_height now maintained in kernel features enum variants * sum fees via explicit enum variants * cleanup semantics around with_fee and with_lock_height for tx builders * document the kernel feature variants * serialize kernel features correctly for api json * cleanup * commit * bump to unstick azure
88 lines
2.4 KiB
Rust
88 lines
2.4 KiB
Rust
// Copyright 2018 The Grin Developers
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//! Builds the blinded output and related signature proof for the block
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//! reward.
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use crate::consensus::reward;
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use crate::core::{KernelFeatures, Output, OutputFeatures, TxKernel};
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use crate::keychain::{Identifier, Keychain};
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use crate::libtx::error::Error;
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use crate::libtx::{
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aggsig,
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proof::{self, ProofBuild},
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};
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use crate::util::{secp, static_secp_instance};
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use grin_keychain::SwitchCommitmentType;
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/// output a reward output
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pub fn output<K, B>(
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keychain: &K,
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builder: &B,
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key_id: &Identifier,
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fees: u64,
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test_mode: bool,
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) -> Result<(Output, TxKernel), Error>
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where
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K: Keychain,
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B: ProofBuild,
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{
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let value = reward(fees);
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// TODO: proper support for different switch commitment schemes
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let switch = &SwitchCommitmentType::Regular;
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let commit = keychain.commit(value, key_id, switch)?;
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trace!("Block reward - Pedersen Commit is: {:?}", commit,);
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let rproof = proof::create(keychain, builder, value, key_id, switch, commit, None)?;
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let output = Output {
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features: OutputFeatures::Coinbase,
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commit: commit,
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proof: rproof,
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};
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let secp = static_secp_instance();
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let secp = secp.lock();
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let over_commit = secp.commit_value(reward(fees))?;
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let out_commit = output.commitment();
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let excess = secp.commit_sum(vec![out_commit], vec![over_commit])?;
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let pubkey = excess.to_pubkey(&secp)?;
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let features = KernelFeatures::Coinbase;
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let msg = features.kernel_sig_msg()?;
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let sig = match test_mode {
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true => {
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let test_nonce = secp::key::SecretKey::from_slice(&secp, &[1; 32])?;
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aggsig::sign_from_key_id(
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&secp,
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keychain,
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&msg,
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value,
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&key_id,
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Some(&test_nonce),
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Some(&pubkey),
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)?
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}
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false => {
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aggsig::sign_from_key_id(&secp, keychain, &msg, value, &key_id, None, Some(&pubkey))?
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}
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};
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let proof = TxKernel {
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features: KernelFeatures::Coinbase,
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excess: excess,
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excess_sig: sig,
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};
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Ok((output, proof))
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}
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