message: Use CosmWasmClient.queryContractSmart
diff: @@ -160,8 +160,7 @@ export class CosmWasmConnection implements BlockchainConnection {
  this.erc20Tokens.map(
  async (erc20): Promise<Amount> => {
  const queryMsg = { balance: { address: address } };
  - // tslint:disable-next-line: deprecation
  - const smart = await this.restClient.queryContractSmart(erc20.contractAddress, queryMsg);
  + const smart = await this.cosmWasmClient.queryContractSmart(erc20.contractAddress, queryMsg);
  const response = JSON.parse(fromAscii(smart));
  const normalizedBalance = new BN(response.balance).toString();
  return {
  