decodeParameters

Callable

• decodeParameters(abi: AbiInput[], bytes: string): { __length__: number }

---

• Decodes ABI encoded parameters to its JavaScript types.

  @example

  let res = web3.eth.abi.decodeParameters(
     ["string", "uint256"],
     "0x000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000ea000000000000000000000000000000000000000000000000000000000000000848656c6c6f212521000000000000000000000000000000000000000000000000"
   );
   console.log(res);
   > { '0': 'Hello!%!', '1': 234n, __length__: 2 }
  
  let res = web3.eth.abi.decodeParameters(
     [
       {
         type: "string",
         name: "myString",
       },
       {
         type: "uint256",
         name: "myNumber",
       },
     ],
     "0x000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000ea000000000000000000000000000000000000000000000000000000000000000848656c6c6f212521000000000000000000000000000000000000000000000000"
   );
  console.log(res);
   > {
   '0': 'Hello!%!',
   '1': 234n,
   __length__: 2,
   myString: 'Hello!%!',
   myNumber: 234n
  }
  
  const res = web3.eth.abi.decodeParameters(
     [
       "uint8[]",
       {
         ParentStruct: {
           propertyOne: "uint256",
           propertyTwo: "uint256",
           childStruct: {
             propertyOne: "uint256",
             propertyTwo: "uint256",
           },
         },
       },
     ],
     "0x00000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000002a0000000000000000000000000000000000000000000000000000000000000038000000000000000000000000000000000000000000000000000000000000002d000000000000000000000000000000000000000000000000000000000000004e0000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000002a0000000000000000000000000000000000000000000000000000000000000018"
   );
   console.log(res);
   >
   '0': [ 42n, 24n ],
   '1': {
     '0': 42n,
     '1': 56n,
     '2': {
       '0': 45n,
       '1': 78n,
       __length__: 2,
       propertyOne: 45n,
       propertyTwo: 78n
     },
     __length__: 3,
     propertyOne: 42n,
     propertyTwo: 56n,
     childStruct: {
       '0': 45n,
       '1': 78n,
       __length__: 2,
       propertyOne: 45n,
       propertyTwo: 78n
     }
   },
   __length__: 2,
   ParentStruct: {
     '0': 42n,
     '1': 56n,
     '2': {
       '0': 45n,
       '1': 78n,
       __length__: 2,
       propertyOne: 45n,
       propertyTwo: 78n
     },
     __length__: 3,
     propertyOne: 42n,
     propertyTwo: 56n,
     childStruct: {
       '0': 45n,
       '1': 78n,
       __length__: 2,
       propertyOne: 45n,
       propertyTwo: 78n
     }
   }
  }

  ---

  Parameters

  • abi: AbiInput[]

    An array of AbiInput. See the Solidity documentation for a list of types.

  • bytes: string

    The ABI byte code to decode

  Returns { __length__: number }

  • The result object containing the decoded parameters.

  • [key string]: unknown

  • __length__: number