message: add GAS_LIMIT_MULTIPLIED_BY
diff: @@ -18,6 +18,8 @@ import { t } from "onefx/lib/iso-i18n";
  import { getAntenna } from "../shared/wallet/get-antenna";
  import { ABI } from "./abi";
  +const GAS_LIMIT_MULTIPLIED_BY = 3;
  +
  export interface Method {
  name: string;
  inputsNames: [string];
  @@ -363,7 +365,9 @@ export class ERC20 implements IERC20 {
  });
  return {
  gasPrice: `${gasPrice}`,
  - gasLimit: gas
  + gasLimit: new BigNumber(gas)
  + .multipliedBy(GAS_LIMIT_MULTIPLIED_BY)
  + .toFixed(0)
  };
  }
  