gRPC auction prototype

auction.proto

syntax = "proto3";

option go_package = "github.com/StephanieSunshine/go-auction";

package auction;

service Auction {
	rpc ListAll() returns (Auctions) {}
	rpc GetAuction(AuctionId) returns (AuctionData) {}
	rpc StreamUpdates(AuctionId) returns (stream AuctionUpdates) {}
	rpc PlaceBid(NewBid) returns (BidCert) {}
	rpc CreateAuction(NewAuction) returns (AuctionCert) {}
}

message BidData {
	uint32 user_id = 1;
	uint32 auction_id = 2;
	uint32 amount = 3;
}

message AuctionData {
	uint32 auction_id = 1;
	string title = 2;
	string description = 3;
	uint32 starting_price = 4;
	uint32 current_bid_price = 5;
	uint32 current_bid_userid = 6;
	string last_bid_when = 7;
	string time_start = 8;
	string time_end = 9;
	uint32 owner_user_id = 10;
}

message Auctions {
	repeated AuctionData auctions = 1;
}

message AuctionId {
	uint32 auction_id = 1;
}

message AuctionUpdates {
	BidData bid = 1;
}

message NewBid {
	string auth_token = 1;
	BidData bid = 2;
}

message BidCert {
	uint32 auction_id = 1;
	string bid_id = 2;
	string timestamp = 3;
}

message NewAuction {
	string auth_token = 1;
	AuctionData new = 2;
}

message AuctionCert {
	uint32 auction_id = 1;
	string timestamp = 2;
}