Revert removal of coin.proto

Author: timlind

proto/sifnode/dispensation/v1/types.proto

@@ -2,6 +2,7 @@ syntax = "proto3";
 package sifnode.dispensation.v1;
 
 import "gogoproto/gogo.proto";
+import "cosmos/base/coin.proto";
 
 option go_package = "github.com/Sifchain/sifnode/x/dispensation/types";
 
@@ -32,7 +33,8 @@ message DistributionRecord {
   ClaimStatus claim_status                = 1;
   string distribution_name                = 2;
   string recipient_address                = 3;
-  repeated string coins = 4 [
+  repeated cosmos.base.v1beta1.Coin coins = 4 [
+    (gogoproto.nullable)     = false,
     (gogoproto.castrepeated) = "github.com/cosmos/cosmos-sdk/types.Coins",
     (gogoproto.moretags)     = "yaml:\"coins\""
   ];

third_party/proto/cosmos/base/coin.proto

@@ -0,0 +1,40 @@
+syntax = "proto3";
+package cosmos.base.v1beta1;
+
+import "gogoproto/gogo.proto";
+
+option go_package                       = "github.com/cosmos/cosmos-sdk/types";
+option (gogoproto.goproto_stringer_all) = false;
+option (gogoproto.stringer_all)         = false;
+
+// Coin defines a token with a denomination and an amount.
+//
+// NOTE: The amount field is an Int which implements the custom method
+// signatures required by gogoproto.
+message Coin {
+  option (gogoproto.equal) = true;
+
+  string denom  = 1;
+  string amount = 2 [(gogoproto.customtype) = "Int", (gogoproto.nullable) = false];
+}
+
+// DecCoin defines a token with a denomination and a decimal amount.
+//
+// NOTE: The amount field is an Dec which implements the custom method
+// signatures required by gogoproto.
+message DecCoin {
+  option (gogoproto.equal) = true;
+
+  string denom  = 1;
+  string amount = 2 [(gogoproto.customtype) = "Dec", (gogoproto.nullable) = false];
+}
+
+// IntProto defines a Protobuf wrapper around an Int object.
+message IntProto {
+  string int = 1 [(gogoproto.customtype) = "Int", (gogoproto.nullable) = false];
+}
+
+// DecProto defines a Protobuf wrapper around a Dec object.
+message DecProto {
+  string dec = 1 [(gogoproto.customtype) = "Dec", (gogoproto.nullable) = false];
+}