Perform an automated transaction using 1inch API

Question

To perform an automated 1 inch transaction I use these two functions. It works well at first. Unfortunately, in the last few days I have always had the same errors:

• Fail with error 'Return amount is not enough'

• Warning! Error encountered during contract execution [Reverted]

  def get_api_call_data(_from_coin,_to_coin):
      global api_data
  
      try:
  
        call_data = requests.get(
        f'https://api.1inch.exchange/v1.1/swap?fromTokenSymbol={_from_coin}&toTokenSymbol={_to_coin}&amount={_amount_to_exchange}&fromAddress={base_account}&slippage={slippage}&disableEstimate=true')
  
        api_data = call_data.json()
  
      except:
        logging.exception("get_api_call_data")
  
      return api_data
  
  
  def one_inch_token_swap(_from_coin,_to_coin):
    global tx_hash
  
    web3 = Web3(Web3.HTTPProvider(eth_provider_url))
    nonce = web3.eth.getTransactionCount(base_account)
    json_data = get_api_call_data(_from_coin,_to_coin)
    data = json_data['data']
    to = json_data['to']
    value = _amount_to_exchange
  
  
    url_fees = 'https://ethgasstation.info/api/ethgasAPI.json?'
    r_fees = requests.get(url_fees)
    js_fees = json.loads(r_fees.content)
    Fastest = js_fees['fastest']
  
    tx = {
        'nonce': nonce,
        'to': to,  
        'value': _amount_to_exchange,         
        'gasPrice':(Fastest+100)*(100000000),
        'from': base_account,
        'data': data,
    }
  
    gas = web3.eth.estimateGas(tx)
    tx["gas"] = gas
  
    signed_tx = web3.eth.account.signTransaction(tx, private_key)
    tx_hash = web3.eth.sendRawTransaction(signed_tx.rawTransaction)
  

what could be the cause of this error?

Answer 1

Did you "approve" _from_coin to the 1inch address?

1inch can not swap your token if you do not approve your tokens for him.