syntax = "proto3";
package cash.z.wallet.sdk.rpc;
option go_package = "walletrpc";

import "compact_formats.proto";

// A BlockID message contains identifiers to select a block: a height or a
// hash. If the hash is present it takes precedence.
message BlockID {
     uint64 height = 1;
     bytes hash = 2;
}

// BlockRange technically allows ranging from hash to hash etc but this is not
// currently intended for support, though there is no reason you couldn't do
// it. Further permutations are left as an exercise.
message BlockRange {
    BlockID start = 1;
    BlockID end = 2;
}

// A TxFilter contains the information needed to identify a particular
// transaction: either a block and an index, or a direct transaction hash.
message TxFilter {
     BlockID block = 1;
     uint64 index = 2;
     bytes hash = 3;
}

// RawTransaction contains the complete transaction data.
message RawTransaction {
    bytes data = 1;
}

message SendResponse {
    int32 errorCode = 1;
    string errorMessage = 2;
}

// Empty placeholder. Someday we may want to specify e.g. a particular chain fork.
message ChainSpec {}

message Empty {}

service CompactTxStreamer {
    rpc GetLatestBlock(ChainSpec) returns (BlockID) {}
    rpc GetBlock(BlockID) returns (CompactBlock) {}
    rpc GetBlockRange(BlockRange) returns (stream CompactBlock) {}
    rpc GetTransaction(TxFilter) returns (RawTransaction) {}
    rpc SendTransaction(RawTransaction) returns (SendResponse) {}
    rpc GetLightdInfo(Empty) returns (SendResponse) {}
}