Fix protoDecimalToJson 0 fractional part

packages/stargate/src/modules/index.ts

@@ -82,6 +82,7 @@ export {
   isAminoMsgDelegate,
   isAminoMsgEditValidator,
   isAminoMsgUndelegate,
+  protoDecimalToJson,
 } from "./staking/aminomessages";
 export {
   isMsgBeginRedelegateEncodeObject,

packages/stargate/src/modules/staking/aminomessages.spec.ts

@@ -18,10 +18,43 @@ import {
   AminoMsgEditValidator,
   AminoMsgUndelegate,
   createStakingAminoConverters,
+  protoDecimalToJson,
 } from "./aminomessages";
 
 describe("AminoTypes", () => {
   describe("toAmino", () => {
+    it("works for protoDecimalToJson", () => {
+      const testSet = [
+        {
+          decimal: "0",
+          expected: "0.000000000000000000",
+        },
+        {
+          decimal: "1",
+          expected: "0.000000000000000001",
+        },
+        {
+          decimal: "2497",
+          expected: "0.000000000000002497",
+        },
+        {
+          decimal: "987000000000000000",
+          expected: "0.987000000000000000",
+        },
+        {
+          decimal: "123987000000000000000",
+          expected: "123.987000000000000000",
+        },
+        {
+          decimal: "4872000000000000000000",
+          expected: "4872.000000000000000000",
+        },
+      ];
+      for (let i = 0; i < testSet.length; i++) {
+        expect(protoDecimalToJson(testSet[i].decimal)).toEqual(testSet[i].expected);
+      }
+    });
+
     it("works for MsgBeginRedelegate", () => {
       const msg: MsgBeginRedelegate = {
         delegatorAddress: "cosmos1pkptre7fdkl6gfrzlesjjvhxhlc3r4gmmk8rs6",

packages/stargate/src/modules/staking/aminomessages.ts

@@ -29,10 +29,10 @@ interface Description {
   readonly details: string;
 }
 
-function protoDecimalToJson(decimal: string): string {
+export function protoDecimalToJson(decimal: string): string {
   const parsed = Decimal.fromAtomics(decimal, 18);
   const [whole, fractional] = parsed.toString().split(".");
-  return `${whole}.${fractional.padEnd(18, "0")}`;
+  return `${whole}.${(typeof fractional !== "undefined" ? fractional : "").padEnd(18, "0")}`;
 }
 
 function jsonDecimalToProto(decimal: string): string {