message: Write fee amount more compact
diff: /* eslint-disable @typescript-eslint/naming-convention */
  import { fromBase64, toBase64 } from "@cosmjs/encoding";
  import {
  + coins,
  DirectSecp256k1HdWallet,
  encodePubkey,
  makeAuthInfoBytes,
  @@ -312,12 +313,7 @@ describe("StargateClient", () => {
  };
  const txBodyBytes = registry.encode(txBodyFields);
  const { accountNumber, sequence } = (await client.getSequence(address))!;
  - const feeAmount = [
  - {
  - amount: "2000",
  - denom: "ucosm",
  - },
  - ];
  + const feeAmount = coins(2000, "ucosm");
  const gasLimit = 200000;
  const authInfoBytes = makeAuthInfoBytes([pubkey], feeAmount, gasLimit, sequence);
  @@ -373,12 +369,7 @@ describe("StargateClient", () => {
  };
  const txBodyBytes = registry.encode(txBodyFields);
  const chainId = await client.getChainId();
  - const feeAmount = [
  - {
  - amount: "2000",
  - denom: "ucosm",
  - },
  - ];
  + const feeAmount = coins(2000, "ucosm");
  const gasLimit = 200000;
  const { accountNumber: accountNumber1, sequence: sequence1 } = (await client.getSequence(address))!;
  