syntax = "proto3";

import "types/types.proto";

package consensus;

option go_package = "./consensus;consensus";

message Error {
    uint32 code = 1;
    string description = 2;
}

message Result {
    bool ok = 1;
    optional Error error = 2;
}

message BlockHeader {
    types.H256 parent_hash = 1;
    types.H256 uncle_hash = 2;
    bytes coinbase = 3;
    types.H256 root_hash = 4;
    types.H256 tx_hash = 5;
    types.H256 receipt_hash = 6;
    bytes bloom = 7;
    types.H256 difficulty = 8;
    uint64 number = 9;
    uint64 gas_limit = 10;
    uint64 gas_used = 11;
    uint64 time = 12;
    bytes extra = 13;
    types.H256 mix_digest = 14;
    uint64 nonce = 15;
}

message Transaction {
}

message Block {
    BlockHeader header = 1;
    repeated BlockHeader uncles = 2;
    repeated Transaction transactions = 3;
    bytes total_difficulty = 4;
}

message GetAuthorRequest {
    BlockHeader header = 1;
}

message GetAuthorResponse {
    Result result = 1;
    types.H160 address = 2;
}

message VerifyHeaderRequest {
    BlockHeader header = 1;
    bool seal = 2;
}

message VerifyHeaderResponse {
    Result result = 1;
}

message VerifyHeadersRequest {
    repeated BlockHeader headers = 1;
    repeated bool seal = 2;
}

message VerifyHeadersResponse {
    Result result = 1;
}

message VerifyUnclesRequest {
    Block block = 1;
}

message VerifyUnclesResponse {
    Result result = 1;
}

message SealBlockRequest {
    Result result = 1;
    Block block = 2;
}

message SealBlockResponse {
    Result result = 1;
    Block block = 2;
}

message PrepareRequest {
    BlockHeader header = 1;
}

message PrepareResponse {
    Result result = 1;
}

message FinalizeRequest {
    BlockHeader header = 1;
    repeated BlockHeader uncles = 2;
}

message FinalizeResponse {
    Result result = 1;
    types.H256 miner_reward = 2;
    repeated types.H256 uncle_rewards = 3;
}

service ConsensusEngine {
    rpc GetAuthor(GetAuthorRequest) returns(GetAuthorResponse);
    rpc VerifyHeader(stream VerifyHeaderRequest) returns(stream VerifyHeaderResponse);
    rpc VerifyHeaders(stream VerifyHeadersRequest) returns(stream VerifyHeadersResponse);
    rpc VerifyUncles(stream VerifyUnclesRequest) returns(stream VerifyUnclesResponse);
    rpc Prepare(stream PrepareRequest) returns(stream PrepareResponse);
    rpc Finalize(stream FinalizeRequest) returns(stream FinalizeResponse);
    rpc Seal(SealBlockRequest) returns(stream SealBlockResponse);
}