// TODO: This setup requires that the BN (beacon node) holds the block in state
// during the interval between the `GenerateProposalRequest` and the
// `SubmitProposalRequest`.
//
// This is sub-optimal as if a validator client switches BN during this process
// the block will be lost.
//
// This "stateful" method is being used presently because it's easier and
// requires less maintainence as the `BeaconBlock` definition changes.

syntax = "proto3";

package ethereum.beacon.rpc.v1;

service BeaconBlockService {
    rpc ProduceBeaconBlock(ProduceBeaconBlockRequest) returns (ProduceBeaconBlockResponse);
    rpc PublishBeaconBlock(PublishBeaconBlockRequest) returns (PublishBeaconBlockResponse);
}

service ValidatorService {
    // rpc ValidatorAssignment(ValidatorAssignmentRequest) returns (ValidatorAssignmentResponse);
	rpc ProposeBlockSlot(ProposeBlockSlotRequest) returns (ProposeBlockSlotResponse);
	rpc ValidatorIndex(PublicKey) returns (IndexResponse);
}

message BeaconBlock {
	uint64 slot = 1;
	bytes block_root = 2;
	bytes randao_reveal = 3;
	bytes signature = 4;
}

// Validator requests an unsigned proposal.
message ProduceBeaconBlockRequest {
    uint64 slot = 1;
}

// Beacon node returns an unsigned proposal.
message ProduceBeaconBlockResponse {
    BeaconBlock block = 1;
}

// Validator submits a signed proposal.
message PublishBeaconBlockRequest {
    BeaconBlock block = 1;
}

// Beacon node indicates a sucessfully submitted proposal.
message PublishBeaconBlockResponse {
    bool success = 1;
    bytes msg = 2;
}

// A validators duties for some epoch.
// TODO: add shard duties.
message ValidatorAssignment {
	oneof block_production_slot_oneof {
		bool block_production_slot_none = 1;
		uint64 block_production_slot = 2;
	}
}

message ValidatorAssignmentRequest {
	uint64 epoch = 1;
	bytes validator_index = 2;
}

/*
 * Propose slot
 */

message ProposeBlockSlotRequest {
	uint64 epoch = 1;
	uint64 validator_index = 2;
}

message ProposeBlockSlotResponse {
	oneof slot_oneof {
		bool none = 1;
		uint64 slot = 2;
	}
}

/*
 * Validator Assignment
 */

message PublicKey {
	bytes public_key = 1;
}

message IndexResponse {
	uint64 index = 1;
}