syntax = "proto3";
package protocol;
option java_package = "io.mediachain.protocol.transactor";

import "Types.proto";

message InsertRequest {
    bytes canonicalCbor = 1;
}

message UpdateRequest {
    bytes chainCellCbor = 1;
}

message JournalStreamRequest {}

message UpdateChainResult {
    MultihashReference canonical = 1;
    MultihashReference chain = 2;
    MultihashReference chainPrevious = 3;
}

message JournalEvent {
    oneof event {
        MultihashReference insertCanonicalEvent = 1;
        UpdateChainResult updateChainEvent = 2;
        MultihashReference journalBlockEvent = 3;
    }
}

service TransactorService {
    rpc InsertCanonical(InsertRequest) returns
        (MultihashReference);

    rpc UpdateChain(UpdateRequest) returns
        (MultihashReference);

    rpc LookupChain(MultihashReference) returns
        (ChainReference);

    rpc JournalStream(JournalStreamRequest) returns
        (stream JournalEvent);
}