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First of all, i extracting function from abi of my contract and calling them automatically. As per documentation of solidity, when we compile .sol, some functions are automatically generated as per our contract specs. For, example, if i write in my contract mapping( address => uint256) public balances, it will generate function namely balances and taking address as input (argument). When my program call this function (with properly given valid address), it causes error. I am confused why I could not find any solution for this. Although i have given all kind of inputs as per requirement of my contract. Still getting such error. Here is my code

async function genericGetterFunction(receipt, key){
  var funcParmLength
  var myFunc; 
  var  myContAddr = receipt.contractAddress;
  var myContractAbiDefenition = sources[key].abi;
  var myContractInstance = new web3.eth.Contract(myContractAbiDefenition, myContAddr);

  for(j=0; j < getterFunctionsNameObject[key].length; j++){
      myFunc = getterFunctionsNameObject[key][j].func;
      funcParmLength  = (getterFunctionsNameObject[key][j].input).length;
      console.log("param length: ", funcParmLength)
      if (funcParmLength ==0)
          res = await myContractInstance.methods[myFunc]().call({from: account1, value: web3.utils.toWei('0', 'ether')})
      else 
          res = await myContractInstance.methods[myFunc](getterFunctionsNameObject[key][j].input).call({from: account1, value: web3.utils.toWei('0', 'ether')})  
  console.log("Normal Order output", res);
  }

output of console.log(getterFunctionsNameObject);

[ [ { contract: 0, func: 'balances', input: [Array] },
    { contract: 0, func: 'getTotalSupply', input: [] },
    { contract: 0, func: 'owner', input: [] },
    { contract: 0, func: 'totalSupply', input: [] } ] ]

output of console.log(getterFunctionsNameObject[0]);

[ { contract: 0,
    func: 'balances',
    input: [ '0x2cAe18ac37d85CccdE2ebB63D0c391Fe1ac7c36f' ] },
  { contract: 0, func: 'getTotalSupply', input: [] },
  { contract: 0, func: 'owner', input: [] },
  { contract: 0, func: 'totalSupply', input: [] } ]

output of console.log("function Name: ", myFunc) : function Name: balances output of console.log("param length: ", funcParmLength): param length: 1 output of console.log("arguments: ", getterFunctionsNameObject[key][j].input) arguments: [ '0x2cAe18ac37d85CccdE2ebB63D0c391Fe1ac7c36f' ] Here is my error:

UnhandledPromiseRejectionWarning: Error: invalid address (arg="", coderType="address", value=["0x2cAe18ac37d85CccdE2ebB63D0c391Fe1ac7c36f"])
    at Object.throwError (C:\Users\aa\Desktop\temp\node_modules\ethers\utils\errors.js:68:17)
    at CoderAddress.encode (C:\Users\aa\Desktop\temp\node_modules\ethers\utils\abi-coder.js:467:20)
    at C:\Users\aa\Desktop\temp\node_modules\ethers\utils\abi-coder.js:605:59
    at Array.forEach (<anonymous>)
    at pack (C:\Users\aa\Desktop\temp\node_modules\ethers\utils\abi-coder.js:604:12)
    at CoderTuple.encode (C:\Users\aa\Desktop\temp\node_modules\ethers\utils\abi-coder.js:764:16)
    at AbiCoder.encode (C:\Users\aa\Desktop\temp\node_modules\ethers\utils\abi-coder.js:897:77)
    at ABICoder.encodeParameters (C:\Users\aa\Desktop\temp\node_modules\web3-eth-abi\src\index.js:96:27)
    at C:\Users\aa\Desktop\temp\node_modules\web3-eth-contract\src\index.js:432:24
    at Array.map (<anonymous>)
    at Object._encodeMethodABI (C:\Users\aa\Desktop\temp\node_modules\web3-eth-contract\src\index.js:431:12)
    at Object._processExecuteArguments (C:\Users\aa\Desktop\temp\node_modules\web3-eth-contract\src\index.js:747:39)
    at Object._executeMethod (C:\Users\aa\Desktop\temp\node_modules\web3-eth-contract\src\index.js:772:54)
    at genericGetterFunction (C:\Users\aa\Desktop\temp\deploy1.js:212:99)
    at main (C:\Users\aa\Desktop\temp\deploy1.js:152:17)
    at process._tickCallback (internal/process/next_tick.js:68:7)
(node:6276) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:6276) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
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With getterFunctionsNameObject[key][j].input, you are passing a single array as input parameter.

Use ...getterFunctionsNameObject[key][j].input instead.

BTW, I believe that you can use this also for functions which take no input parameters.

In other words, the if (funcParmLength == 0) / else part is redundant.

Just do res = await myContractInstance.methods[myFunc](...getterFunctionsNameObject[key][j].input).call({from: account1, value: web3.utils.toWei('0', 'ether')}).

BTW2, you don't need to specify value when it's zero.

| improve this answer | |
  • 1
    thank a lot, you always help in better way and very quick.... – Amir Ali Nov 20 '19 at 1:57
  • by the way, i have one contract which contrains chinese characters, that is not executing, but all others are perfectly done... I think i must have to incorporate some string formatting code like utf-8,.... . – Amir Ali Nov 20 '19 at 1:59

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