encodeFunctionSignature

Callable

• encodeFunctionSignature(functionName: string | AbiFunctionFragment): string

---

• Encodes the function name to its ABI representation, which are the first 4 bytes of the sha3 of the function name including types. The JSON interface spec documentation https://docs.soliditylang.org/en/latest/abi-spec.html#json

  @example

  const signature = web3.eth.abi.encodeFunctionSignature({
    name: "myMethod",
    type: "function",
    inputs: [
      {
        type: "uint256",
        name: "myNumber",
      },
      {
        type: "string",
        name: "myString",
      },
    ],
  });
  console.log(signature);
  > 0x24ee0097
  
  const signature = web3.eth.abi.encodeFunctionSignature('myMethod(uint256,string)')
  console.log(signature);
  > 0x24ee0097
  
  const signature = web3.eth.abi.encodeFunctionSignature('safeTransferFrom(address,address,uint256,bytes)');
  console.log(signature);
  > 0xb88d4fde

  ---

  Parameters

  • functionName: string | AbiFunctionFragment

    The function name to encode or the JSON interface object of the function. If the passed parameter is a string, it has to be in the form of functionName(param1Type,param2Type,...). eg: myFunction(uint256,uint32[],bytes10,bytes)

  Returns string

  • The ABI signature of the function.