syntax = "proto3";

package bdchain.api;

import "google/protobuf/empty.proto";
import "bdchain/api/common.proto";

option go_package = "bdchain/sdk/api/grpc/txledger";
option java_package = "bdchain.api.grpc.txledger";
option java_outer_classname = "TransactionLedgerProto";
option java_multiple_files = true;

service TransactionLedger {
  rpc ClientVersion (google.protobuf.Empty) returns (ClientVersionResponse);
  rpc CreateLedger (CreateLedgerRequest) returns (CreateLedgerResponse);
  rpc GetLedgers (google.protobuf.Empty) returns (GetLedgersResponse);
  rpc BlockCount (BlockCountRequest) returns (BlockCountResponse);
  rpc GetBlocks (GetBlocksRequest) returns (GetBlocksResponse);
  rpc SendTransaction (SendTransactionRequest) returns (SendTransactionResponse);
}

message Transaction {
  bytes block_hash = 1;     // 事务所在的区块的哈希，当事务处于待确认状态时为`null`
  uint32 index = 2;         // 事务在区块中的位置 index，当事务处于待确认状态时为`null`
  bytes hash = 3;           // 事务的哈希
  TransactionType type = 4; // 事务类型
  bytes from = 5;           // 发送账户地址
  uint64 nonce = 6;         // 这条事务之前发送者所发送的事务数量
  bytes to = 7;             // 接收账户地址，或者调用的合约地址，或者`null`如为合约创建
  bytes data = 8;           // 数据或合约代码
  bytes v = 9;              // ECDSA recovery id
  bytes r = 10;             // ECDSA signature r
  bytes s = 11;             // ECDSA signature s
}

message Block {
  uint64 index = 1;                      // 事务链本地区块索引，当区块处于待确认状态时为`null`
  bytes hash = 2;                        // 区块的哈希，当区块处于待确认状态时为`null`
  repeated bytes parent_hashes = 3;      // 父区块的哈希
  repeated bytes witnesses = 4;          // 见证者账户地址
  int64 timestamp = 5;                   // 区块产生时的 UNIX 时间戳，单位为秒
  uint64 size = 6;                       // 区块大小的字节数
  bytes transactions_root = 7;           // 区块的事务树根
  repeated Transaction transactions = 8; // 事务对象的数组，或为空
  repeated bytes transaction_hashes = 9; // 32字节的交易哈希的数组，或为空
}

message CreateLedgerRequest {
  string name = 1;
}
message CreateLedgerResponse {
  bool ok = 1;
}

message GetLedgersResponse {
  repeated string ledgers = 1;
}

message BlockCountRequest {
  string ledger = 1;
}
message BlockCountResponse {
  uint64 block_count = 1;
}

message GetBlocksRequest {
  string ledger = 1;
  uint64 from_index = 2;
  uint32 count = 3; // Optional, default to 10, max value is 10
  bool full_transaction = 4;
}
message GetBlocksResponse {
  repeated Block blocks = 1;
}

message SendTransactionRequest {
  string ledger = 1;
  message Transaction {
    TransactionType type = 1;
    bytes from = 2;
    bytes to = 3;
    bytes data = 4;
  }
  Transaction transaction = 2;
}
message SendTransactionResponse {
  bytes hash = 1;
}