import {
  BaseContract,
  BigNumber,
  BigNumberish,
  CallOverrides,
  ContractTransaction,
  Overrides,
} from 'ethers';

export const ERC20_ABI = [
  {
    name: 'approve',
    inputs: [
      {
        internalType: 'address',
        name: 'spender',
        type: 'address',
      },
      {
        internalType: 'uint256',
        name: 'amount',
        type: 'uint256',
      },
    ],
    outputs: [
      {
        internalType: 'bool',
        name: '',
        type: 'bool',
      },
    ],
    stateMutability: 'nonpayable',
    type: 'function',
  },
  {
    name: 'allowance',
    inputs: [
      {
        internalType: 'address',
        name: 'owner',
        type: 'address',
      },
      {
        internalType: 'address',
        name: 'spender',
        type: 'address',
      },
    ],
    outputs: [
      {
        internalType: 'uint256',
        name: '',
        type: 'uint256',
      },
    ],
    stateMutability: 'view',
    type: 'function',
  },
];

export interface ERC20Contract extends BaseContract {
  allowance(
    owner: string,
    spender: string,
    overrides?: CallOverrides
  ): Promise<BigNumber>;

  approve(
    spender: string,
    amount: BigNumberish,
    overrides?: Overrides & { from?: string | Promise<string> }
  ): Promise<ContractTransaction>;
}