syntax = "proto3";

package carbon;

option go_package = "./proto;carbon";

service Carbon {
	rpc Offset(OffsetRequest) returns (OffsetResponse) {}
}

message Project {
	// name of the project
	string name = 1;
	// percentage that went to this
	double percentage = 2;
	// amount in tonnes
	double tonnes = 3;
}

// Purchase 1KG (0.001 tonne) of carbon offsets in a single request
message OffsetRequest {}

message OffsetResponse {
	// number of units purchased
	int32 units = 1;
	// the metric used e.g KG or Tonnes
	string metric = 2;
	// number of tonnes
	double tonnes = 3;
	// projects it was allocated to
	repeated Project projects = 4;
}