miguelmota / ethereum-input-data-decoder Goto Github PK

• If you get problem with constructor when build and run
  This way is how I solve the problem when try to run ethereum-input-data-decoder on typescript source code

Hi, how would i decode the input data for a contract creation. Since the ABI isnt known unless I am the contract creator or know the contract address

Hi,

I am getting the following error when running from command line :

internal/modules/cjs/loader.js:1102
      throw new ERR_REQUIRE_ESM(filename, parentPath, packageJsonPath);
      ^

Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: C:\Users\User\AppData\Roaming\npm\node_modules\ethereum-input-data-decoder\node_modules\meow\index.js
require() of ES modules is not supported.
require() of C:\Users\User\AppData\Roaming\npm\node_modules\ethereum-input-data-decoder\node_modules\meow\index.js from C:\Users\User\AppData\Roaming\npm\node_modules\ethereum-input-data-decoder\cli.js is an ES module file as it is a .js file whose nearest parent package.json contains "type": "module" which defines all .js files in that package scope as ES modules.
Instead rename index.js to end in .cjs, change the requiring code to use import(), or remove "type": "module" from C:\Users\User\AppData\Roaming\npm\node_modules\ethereum-input-data-decoder\node_modules\meow\package.json.

    at new NodeError (internal/errors.js:322:7)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1102:13)
    at Module.load (internal/modules/cjs/loader.js:950:32)
    at Function.Module._load (internal/modules/cjs/loader.js:790:12)
    at Module.require (internal/modules/cjs/loader.js:974:19)
    at require (internal/modules/cjs/helpers.js:93:18)
    at Object.<anonymous> (C:\Users\User\AppData\Roaming\npm\node_modules\ethereum-input-data-decoder\cli.js:3:14)
    at Module._compile (internal/modules/cjs/loader.js:1085:14)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)
    at Module.load (internal/modules/cjs/loader.js:950:32) {
  code: 'ERR_REQUIRE_ESM'
}

Am i missing something ?

Regards,

David

I scanned the ethereum main chain, tx_hash = 0x0fc8f1cb5112c4679dfcbde54306cabecedfbfd115030252b2e3d77ed7b7da8c.
decode the input and there is a error msg "Decoded int exceeds width: 160 vs 256 "

const ether_decoder = require('ethereum-input-data-decoder');
const decoder = new ether_decoder(config.get('ERC20-abi'));
//...
const callObj = decoder.decodeData(transaction.input);
//...

ethereum-input-data-decoder version 0.0.6

What is ABI information? I have a structure that performs random transactions over etherscan. Which abi will I use?

Hi. Huge fan of this tool, saves me tons of time fiddling with transaction input data. Thanks to all the maintainers for their work.

I've encountered behaviour I think may be incorrect when decoding inputs with the tuple[] type.

Specifically, calls to 0x Exchange contract methods like marketSellOrders which takes 3 params:

1. orders: tuple[]
2. takerAssetFillAmount: uint256
3. signatures: bytes[]

  {
    constant: false,
    inputs: [
      {
        components: [
          { name: 'makerAddress', type: 'address' },
          { name: 'takerAddress', type: 'address' },
          { name: 'feeRecipientAddress', type: 'address' },
          { name: 'senderAddress', type: 'address' },
          { name: 'makerAssetAmount', type: 'uint256' },
          { name: 'takerAssetAmount', type: 'uint256' },
          { name: 'makerFee', type: 'uint256' },
          { name: 'takerFee', type: 'uint256' },
          { name: 'expirationTimeSeconds', type: 'uint256' },
          { name: 'salt', type: 'uint256' },
          { name: 'makerAssetData', type: 'bytes' },
          { name: 'takerAssetData', type: 'bytes' },
        ],
        name: 'orders',
        type: 'tuple[]',
      },
      { name: 'takerAssetFillAmount', type: 'uint256' },
      { name: 'signatures', type: 'bytes[]' },
    ],
    name: 'marketSellOrders',
    outputs: [
      {
        components: [
          { name: 'makerAssetFilledAmount', type: 'uint256' },
          { name: 'takerAssetFilledAmount', type: 'uint256' },
          { name: 'makerFeePaid', type: 'uint256' },
          { name: 'takerFeePaid', type: 'uint256' },
        ],
        name: 'totalFillResults',
        type: 'tuple',
      },
    ],
    payable: false,
    stateMutability: 'nonpayable',
    type: 'function',
  },

{                                                                                                                                                                                                                  
  "method": "marketSellOrders",                                                                                                                                                                                    
  "types": [                                                                                                                                                                                                       
    {                                                                                                                                                                                                              
      "components": [                                                                                                                                                                                              
        {                                                                                                                                                                                                          
          "name": "makerAddress",                                                                                                                                                                                  
          "type": "address"                                                                                                                                                                                        
        }, 
        {                                                                                                                                                                                                          
          "name": "takerAddress",                                                                                                                                                                                  
          "type": "address"                                                                                                                                                                                        
        },                                                                                                                                                                                                         
        {                                                                                                                                                                                                          
          "name": "feeRecipientAddress",                                                                                                                                                                           
          "type": "address"                                                                                                                                                                                        
        },                                                                                                                                                                                                         
        {                                                                                                                                                                                                          
          "name": "senderAddress",                                                                                                                                                                                 
          "type": "address"                                                                                                                                                                                        
        },                                                                                                                                                                                                         
        {                                                                                                                                                                                                          
          "name": "makerAssetAmount",                                                                                                                                                                              
          "type": "uint256"                                                                                                                                                                                        
        },                                                                                                                                                                                                         
        {                                                                                                                                                                                                          
          "name": "takerAssetAmount",                                                                                                                                                                              
          "type": "uint256"                                                                                                                                                                                        
        },                                                                                                                                                                                                         
        {                                                                                                                                                                                                          
          "name": "makerFee",                                                                                                                                                                                      
          "type": "uint256"                                                                                                                                                                                        
        },                                                                                                                                                                                                         
        {                                                                                                                                                                                                          
          "name": "takerFee",                                                                                                                                                                                      
          "type": "uint256"                                                                                                                                                                                        
        },                                                                                                                                                                                                         
        {                                                                                                                                                                                                          
          "name": "expirationTimeSeconds",                                                                                                                                                                         
          "type": "uint256"                                                                                                                                                                                        
        },                                                                                                                                                                                                         
        {                                                                                                                                                                                                          
          "name": "salt",                                                                                                                                                                                          
          "type": "uint256"                                                                                                                                                                                        
        },                                                                                                                                                                                                         
        {                                                                                                                                                                                                          
          "name": "makerAssetData",                                                                                                                                                                                
          "type": "bytes"                                                                                                                                                                                          
        },                                                                                                                                                                                                         
        {                                                                                                                                                                                                          
          "name": "takerAssetData",                                                                                                                                                                                
          "type": "bytes"                                                                                                                                                                                          
        }                                                                                                                                                                                                          
      ],                                                                                                                                                                                                           
      "name": "orders",                                                                                                                                                                                            
      "type": "tuple[]"                                                                                                                                                                                            
    },                                                                                                                                                                                                             
    "uint256",                                                                                                                                                                                                     
    "bytes[]"                                                                                                                                                                                                      
  ],                            
  "inputs": [                                                                                                                                                                                                      
    [                                                                                                                                                                                                              
      "0x6f02E6d47147B4448Fe2f2eb25B4f534cf110c23",                                                                                                                                                                
      "0x0000000000000000000000000000000000000000",                                                                                                                                                                
      "0xA258b39954ceF5cB142fd567A46cDdB31a670124",                                                                                                                                                                
      "0x0000000000000000000000000000000000000000",                                                                                                                                                                
      {                                                                                                                                                                                                            
        "_hex": "0x410d586a20a4bffff5"                                                                                                                                                                             
      },                                                                                                                                                                                                           
      {                                                                                                                                                                                                            
        "_hex": "0x5e05647aedbbd450"                                                                                                                                                                               
      },                                                                                                                                                                                                           
      {                                                                                                                                                                                                            
        "_hex": "0x00"                                                                                                                                                                                             
      },
      {
        "_hex": "0x00"
      },
      {
        "_hex": "0x5d787202"
      },
      {
        "_hex": "0x016d1e79ae50"
      },
      "0xf47261b000000000000000000000000089d24a6b4ccb1b6faa2625fe562bdd9a23260359",
      "0xf47261b0000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2"
    ]
  ],
  "names": [
    "",
    "takerAssetFillAmount",
    "signatures"
  ]
}

What makes sense to me ✔️

• types provides all the information I need

What I'm unsure about ❓

• inputs contains an array with a single entry in it, which appears to by a tuple not a tuple[]. I would have expected this first entry in inputs to be an array of tuples, so that information for multiple orders can be included
• takerAssetFillAmount and signatures appear to be missing from the inputs array. I expected them to be at index 1 and 2 of inputs
• names[0] is an empty string, I expected it to be "orders" (this is not as much of a blocker for me than the first two points)

Code example

I've pushed a code example and steps to replicate this behaviour to https://github.com/liamaharon/decode-tuple-arr-example

I'd appreciate any help figuring out if this is unexpected behaviour from ethereum-input-data-decoder, or if I'm simply misinterpreting the data returned to me. Thanks.

Is there an option to get integers instead of big numbers? I'm having trouble analysing big numbers.

Cheers!

Please allow the package to also accept JSON data directly instead of having to pass a directory path. It's much more flexible to use then imo.

The transaction

The call data is:

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

[
  {
    "inputs": [
      {
        "internalType": "string",
        "name": "name",
        "type": "string"
      },
      {
        "internalType": "string",
        "name": "symbol",
        "type": "string"
      },
      {
        "internalType": "uint256",
        "name": "_totalSupply",
        "type": "uint256"
      }
    ],
    "stateMutability": "nonpayable",
    "type": "constructor"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": true,
        "internalType": "address",
        "name": "owner",
        "type": "address"
      },
      {
        "indexed": true,
        "internalType": "address",
        "name": "spender",
        "type": "address"
      },
      {
        "indexed": false,
        "internalType": "uint256",
        "name": "value",
        "type": "uint256"
      }
    ],
    "name": "Approval",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": true,
        "internalType": "address",
        "name": "from",
        "type": "address"
      },
      {
        "indexed": true,
        "internalType": "address",
        "name": "to",
        "type": "address"
      },
      {
        "indexed": false,
        "internalType": "uint256",
        "name": "value",
        "type": "uint256"
      }
    ],
    "name": "Transfer",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": false,
        "internalType": "address",
        "name": "_previous",
        "type": "address"
      },
      {
        "indexed": false,
        "internalType": "address",
        "name": "_next",
        "type": "address"
      },
      {
        "indexed": false,
        "internalType": "uint256",
        "name": "_time",
        "type": "uint256"
      }
    ],
    "name": "TransferredOwnership",
    "type": "event"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "owner",
        "type": "address"
      },
      {
        "internalType": "address",
        "name": "spender",
        "type": "address"
      }
    ],
    "name": "allowance",
    "outputs": [
      {
        "internalType": "uint256",
        "name": "",
        "type": "uint256"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "spender",
        "type": "address"
      },
      {
        "internalType": "uint256",
        "name": "amount",
        "type": "uint256"
      }
    ],
    "name": "approve",
    "outputs": [
      {
        "internalType": "bool",
        "name": "",
        "type": "bool"
      }
    ],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "account",
        "type": "address"
      }
    ],
    "name": "balanceOf",
    "outputs": [
      {
        "internalType": "uint256",
        "name": "",
        "type": "uint256"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "cap",
    "outputs": [
      {
        "internalType": "uint256",
        "name": "",
        "type": "uint256"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "contractAddress",
    "outputs": [
      {
        "internalType": "address",
        "name": "",
        "type": "address"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "decimals",
    "outputs": [
      {
        "internalType": "uint8",
        "name": "",
        "type": "uint8"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "spender",
        "type": "address"
      },
      {
        "internalType": "uint256",
        "name": "subtractedValue",
        "type": "uint256"
      }
    ],
    "name": "decreaseAllowance",
    "outputs": [
      {
        "internalType": "bool",
        "name": "",
        "type": "bool"
      }
    ],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "spender",
        "type": "address"
      },
      {
        "internalType": "uint256",
        "name": "addedValue",
        "type": "uint256"
      }
    ],
    "name": "increaseAllowance",
    "outputs": [
      {
        "internalType": "bool",
        "name": "",
        "type": "bool"
      }
    ],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "name",
    "outputs": [
      {
        "internalType": "string",
        "name": "",
        "type": "string"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "owner",
    "outputs": [
      {
        "internalType": "address payable",
        "name": "",
        "type": "address"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "symbol",
    "outputs": [
      {
        "internalType": "string",
        "name": "",
        "type": "string"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "totalSupply",
    "outputs": [
      {
        "internalType": "uint256",
        "name": "",
        "type": "uint256"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "recipient",
        "type": "address"
      },
      {
        "internalType": "uint256",
        "name": "amount",
        "type": "uint256"
      }
    ],
    "name": "transfer",
    "outputs": [
      {
        "internalType": "bool",
        "name": "",
        "type": "bool"
      }
    ],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "sender",
        "type": "address"
      },
      {
        "internalType": "address",
        "name": "recipient",
        "type": "address"
      },
      {
        "internalType": "uint256",
        "name": "amount",
        "type": "uint256"
      }
    ],
    "name": "transferFrom",
    "outputs": [
      {
        "internalType": "bool",
        "name": "",
        "type": "bool"
      }
    ],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address payable",
        "name": "_owner",
        "type": "address"
      }
    ],
    "name": "transferOwnership",
    "outputs": [],
    "stateMutability": "nonpayable",
    "type": "function"
  }
]

The result is:

result : {
  "method": null,
  "types": [],
  "inputs": [],
  "names": []
}

Thanks a lot for this script. I imported it through yarn / webpack in a Rails app but get an error message because fs was undefined. Would it make sense to include fs as a dependency?

Example:

https://bscscan.com/tx/0xfa70ffb7ddec8e43728dd710e4f1d240983a502305bbc0c2c845079fc0f154d2

The following error occurred when I decoded：

`root@kali:~/node-v4.9.1-linux-x64/bin# ./ethereum_input_data_decoder --abi DaysBank.abi --input data.txt
/root/node-v4.9.1-linux-x64/lib/node_modules/ethereum-input-data-decoder/cli.js:55
} else {
^^^^

SyntaxError: Unexpected token else
at new Script (vm.js:79:7)
at createScript (vm.js:251:10)
at Object.runInThisContext (vm.js:303:10)
at Module._compile (internal/modules/cjs/loader.js:657:28)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
at Module.load (internal/modules/cjs/loader.js:599:32)
at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
at Function.Module._load (internal/modules/cjs/loader.js:530:3)
at Module.require (internal/modules/cjs/loader.js:637:17)
at require (internal/modules/cjs/helpers.js:22:18)
This is my file and data. What is wrong with it?[{"constant":false,"inputs":[{"name":"b64email","type":"string"}],"name":"payforflag","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"gift","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"name":"flagnum","type":"uint256"},{"indexed":false,"name":"b64email","type":"string"}],"name":"SendFlag","type":"event"}]`

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

how to use this tool in idea? i want to use it in idea with maven,thanks！

I would really appreciate if you could provide a bower package as well.

Hi there,
Trying to use the following contract to test:

https://etherscan.io/tx/0x4ce9635f81e8bc2700f80935bfe39ac762f1cb29eb76f85e5928e5764bdde067

but no results. I tried using the hosted version you have up and running.
Cheers
Adam

In its current state the this decoder will not work with ABIEncoderV2. I suggest it be upgraded to also support the new ABI types allowed under this (currently experimental) feature.
However, due to arbitrary levels of nesting of dynamic types allowed under ABIEncoderV2, it would probably make more sense to change the data structure of the output from the decoder so it's easier to work out the name, type and value of each parameter.
For instance of the following function is defined in Solidity.

struct User {
    uint256 id;
    string name;
    address userAddr;
    Token[] tokensOwned;
}
struct Token {
    address tokenAddress;
    uint256 tokensOwned;
}
function addUser(User user) { ... }

The output could use a recursively structured object, such as:

{
  "inputs": [
    {
      "name": "user",
      "type": "tuple",
      "value": [
        {
          "name": "id",
          "type": "uint256",
          "value": "424242"
        },
        {
          "name": "name",
          "type": "string",
          "value": "Ford Prefect"
        },
        {
          "name": "userAddr",
          "type": "address",
          "value": "0x863DF6BFa4469f3ead0bE8f9F2AAE51c91A907b4"
        },
        {
          "name": "tokensOwned",
          "type": "tuple[]",
          "value": [
            {
              "type": "tuple",
              "value": [
                {
                  "name": "tokenAddress",
                  "type": "address",
                  "value": "0x0D8775F648430679A709E98d2b0Cb6250d2887EF"
                },
                {
                  "name": "tokensOwned",
                  "type": "uint256",
                  "value": "100"
                }
              ]
            },
            {
              "type": "tuple",
              "value": [
                {
                  "name": "tokenAddress",
                  "type": "address",
                  "value": "0x10B0882603c24AF9f1c07cde9f5a06B1300A8c00"
                },
                {
                  "name": "tokensOwned",
                  "type": "uint256",
                  "value": "123123123"
                }
              ]
            }
          ]
        }
      ]
    }
  ],
  "name": "addUser"
}

Thanks for this script.

I used it on a Truffle sample contract MetaCoin. Specifically I called this method meta.sendCoin('0xf27c14a83851210c6e26502433fd8193733ace90', 2) and got the following input back: 0x90b98a11000000000000000000000000f27c14a83851210c6e26502433fd8193733ace900000000000000000000000000000000000000000000000000000000000000002

The result I got back correctly returns the second argument (2) and the types, but the first argument (address) doesn't make sense and it's split up into different words.

This is the ABI:

[
    {
      "constant": false,
      "inputs": [],
      "name": "testLog",
      "outputs": [],
      "payable": false,
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "addr",
          "type": "address"
        }
      ],
      "name": "getBalanceInEth",
      "outputs": [
        {
          "name": "",
          "type": "uint256"
        }
      ],
      "payable": false,
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "receiver",
          "type": "address"
        },
        {
          "name": "amount",
          "type": "uint256"
        }
      ],
      "name": "sendCoin",
      "outputs": [
        {
          "name": "sufficient",
          "type": "bool"
        }
      ],
      "payable": false,
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "addr",
          "type": "address"
        }
      ],
      "name": "getBalanceWithConstant",
      "outputs": [
        {
          "name": "",
          "type": "uint256"
        }
      ],
      "payable": false,
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "addr",
          "type": "address"
        }
      ],
      "name": "getBalance",
      "outputs": [
        {
          "name": "",
          "type": "uint256"
        }
      ],
      "payable": false,
      "type": "function"
    },
    {
      "inputs": [],
      "payable": false,
      "type": "constructor"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "name": "_from",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "_to",
          "type": "address"
        },
        {
          "indexed": false,
          "name": "_value",
          "type": "uint256"
        }
      ],
      "name": "Transfer",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": false,
          "name": "eventName",
          "type": "bytes32"
        },
        {
          "indexed": false,
          "name": "eventValue",
          "type": "bytes32"
        }
      ],
      "name": "Test",
      "type": "event"
    }
  ]

question

hi, I got a ethereum tx decode like this

I don't know why there's a function named "null", I don't know which function is been executed, because there's no function name is "null", it seems only constructor function have the same signature, but I think it can't be constructor been executed, because it can only execute once.

so I am confused.

tx & contract detail

transaction : https://etherscan.io/tx/0x13389268ed1cae395a94cc111528ef8e5b929221af4ecc2a0c7e977dd7dbc38d

smart contract: https://etherscan.io/address/0x3e66b66fd1d0b02fda6c811da9e0547970db2f21#code

abi

[{"inputs":[{"internalType":"address","name":"_weth","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"constant":false,"inputs":[{"components":[{"internalType":"address","name":"pool","type":"address"},{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"swapAmount","type":"uint256"},{"internalType":"uint256","name":"limitReturnAmount","type":"uint256"},{"internalType":"uint256","name":"maxPrice","type":"uint256"}],"internalType":"struct ExchangeProxy.Swap[]","name":"swaps","type":"tuple[]"},{"internalType":"contract TokenInterface","name":"tokenIn","type":"address"},{"internalType":"contract TokenInterface","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"totalAmountIn","type":"uint256"},{"internalType":"uint256","name":"minTotalAmountOut","type":"uint256"}],"name":"batchSwapExactIn","outputs":[{"internalType":"uint256","name":"totalAmountOut","type":"uint256"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"components":[{"internalType":"address","name":"pool","type":"address"},{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"swapAmount","type":"uint256"},{"internalType":"uint256","name":"limitReturnAmount","type":"uint256"},{"internalType":"uint256","name":"maxPrice","type":"uint256"}],"internalType":"struct ExchangeProxy.Swap[]","name":"swaps","type":"tuple[]"},{"internalType":"contract TokenInterface","name":"tokenIn","type":"address"},{"internalType":"contract TokenInterface","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"maxTotalAmountIn","type":"uint256"}],"name":"batchSwapExactOut","outputs":[{"internalType":"uint256","name":"totalAmountIn","type":"uint256"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[],"name":"isOwner","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"components":[{"internalType":"address","name":"pool","type":"address"},{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"swapAmount","type":"uint256"},{"internalType":"uint256","name":"limitReturnAmount","type":"uint256"},{"internalType":"uint256","name":"maxPrice","type":"uint256"}],"internalType":"struct ExchangeProxy.Swap[][]","name":"swapSequences","type":"tuple[][]"},{"internalType":"contract TokenInterface","name":"tokenIn","type":"address"},{"internalType":"contract TokenInterface","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"totalAmountIn","type":"uint256"},{"internalType":"uint256","name":"minTotalAmountOut","type":"uint256"}],"name":"multihopBatchSwapExactIn","outputs":[{"internalType":"uint256","name":"totalAmountOut","type":"uint256"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"components":[{"internalType":"address","name":"pool","type":"address"},{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"swapAmount","type":"uint256"},{"internalType":"uint256","name":"limitReturnAmount","type":"uint256"},{"internalType":"uint256","name":"maxPrice","type":"uint256"}],"internalType":"struct ExchangeProxy.Swap[][]","name":"swapSequences","type":"tuple[][]"},{"internalType":"contract TokenInterface","name":"tokenIn","type":"address"},{"internalType":"contract TokenInterface","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"maxTotalAmountIn","type":"uint256"}],"name":"multihopBatchSwapExactOut","outputs":[{"internalType":"uint256","name":"totalAmountIn","type":"uint256"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"renounceOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_registry","type":"address"}],"name":"setRegistry","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"contract TokenInterface","name":"tokenIn","type":"address"},{"internalType":"contract TokenInterface","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"totalAmountIn","type":"uint256"},{"internalType":"uint256","name":"minTotalAmountOut","type":"uint256"},{"internalType":"uint256","name":"nPools","type":"uint256"}],"name":"smartSwapExactIn","outputs":[{"internalType":"uint256","name":"totalAmountOut","type":"uint256"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"internalType":"contract TokenInterface","name":"tokenIn","type":"address"},{"internalType":"contract TokenInterface","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"totalAmountOut","type":"uint256"},{"internalType":"uint256","name":"maxTotalAmountIn","type":"uint256"},{"internalType":"uint256","name":"nPools","type":"uint256"}],"name":"smartSwapExactOut","outputs":[{"internalType":"uint256","name":"totalAmountIn","type":"uint256"}],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"swapAmount","type":"uint256"},{"internalType":"uint256","name":"nPools","type":"uint256"}],"name":"viewSplitExactIn","outputs":[{"components":[{"internalType":"address","name":"pool","type":"address"},{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"swapAmount","type":"uint256"},{"internalType":"uint256","name":"limitReturnAmount","type":"uint256"},{"internalType":"uint256","name":"maxPrice","type":"uint256"}],"internalType":"struct ExchangeProxy.Swap[]","name":"swaps","type":"tuple[]"},{"internalType":"uint256","name":"totalOutput","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"swapAmount","type":"uint256"},{"internalType":"uint256","name":"nPools","type":"uint256"}],"name":"viewSplitExactOut","outputs":[{"components":[{"internalType":"address","name":"pool","type":"address"},{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint256","name":"swapAmount","type":"uint256"},{"internalType":"uint256","name":"limitReturnAmount","type":"uint256"},{"internalType":"uint256","name":"maxPrice","type":"uint256"}],"internalType":"struct ExchangeProxy.Swap[]","name":"swaps","type":"tuple[]"},{"internalType":"uint256","name":"totalOutput","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"}]

input data

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

decode ouput

{
  "method": null,
  "types": [
    "address"
  ],
  "inputs": [
    "0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984"
  ],
  "names": [
    "_weth"
  ]
}

Hi Miguel, this is nodejs implementation, is there a golang implementation or any suggestion?

This is the exception I run into when I want to decode input of uniswap v3 transaction

/usr/local/lib/node_modules/ethereum-input-data-decoder/cli.js:81
    output.push(`${result.types[i].padEnd(padType)}${result.names[i].padEnd(padName)}${value}`)
                                                                     ^

TypeError: result.names[i].padEnd is not a function
    at run (/usr/local/lib/node_modules/ethereum-input-data-decoder/cli.js:81:70)
    at Object.<anonymous> (/usr/local/lib/node_modules/ethereum-input-data-decoder/cli.js:38:3)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Module.require (node:internal/modules/cjs/loader:1005:19)
    at require (node:internal/modules/cjs/helpers:94:18)
    at Object.<anonymous> (/usr/local/lib/node_modules/ethereum-input-data-decoder/bin/ethereum_input_data_decoder:3:1)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)

Abi:
[{"inputs":[{"internalType":"address","name":"_factory","type":"address"},{"internalType":"address","name":"_WETH9","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"WETH9","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"bytes","name":"path","type":"bytes"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMinimum","type":"uint256"}],"internalType":"struct ISwapRouter.ExactInputParams","name":"params","type":"tuple"}],"name":"exactInput","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint24","name":"fee","type":"uint24"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMinimum","type":"uint256"},{"internalType":"uint160","name":"sqrtPriceLimitX96","type":"uint160"}],"internalType":"struct ISwapRouter.ExactInputSingleParams","name":"params","type":"tuple"}],"name":"exactInputSingle","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"bytes","name":"path","type":"bytes"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"amountInMaximum","type":"uint256"}],"internalType":"struct ISwapRouter.ExactOutputParams","name":"params","type":"tuple"}],"name":"exactOutput","outputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"tokenIn","type":"address"},{"internalType":"address","name":"tokenOut","type":"address"},{"internalType":"uint24","name":"fee","type":"uint24"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"amountInMaximum","type":"uint256"},{"internalType":"uint160","name":"sqrtPriceLimitX96","type":"uint160"}],"internalType":"struct ISwapRouter.ExactOutputSingleParams","name":"params","type":"tuple"}],"name":"exactOutputSingle","outputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"factory","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes[]","name":"data","type":"bytes[]"}],"name":"multicall","outputs":[{"internalType":"bytes[]","name":"results","type":"bytes[]"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"refundETH","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"selfPermit","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"selfPermitAllowed","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"selfPermitAllowedIfNecessary","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"selfPermitIfNecessary","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amountMinimum","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"}],"name":"sweepToken","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amountMinimum","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"feeBips","type":"uint256"},{"internalType":"address","name":"feeRecipient","type":"address"}],"name":"sweepTokenWithFee","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"int256","name":"amount0Delta","type":"int256"},{"internalType":"int256","name":"amount1Delta","type":"int256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"uniswapV3SwapCallback","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountMinimum","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"}],"name":"unwrapWETH9","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountMinimum","type":"uint256"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"feeBips","type":"uint256"},{"internalType":"address","name":"feeRecipient","type":"address"}],"name":"unwrapWETH9WithFee","outputs":[],"stateMutability":"payable","type":"function"},{"stateMutability":"payable","type":"receive"}]
input: 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

I'm having that problem when trying to build my react app:

> react-scripts build

Creating an optimized production build...
Failed to compile.

Failed to minify the code from this file: 

 	./node_modules/ethereum-input-data-decoder/index.js:5 

Read more here: http://bit.ly/2tRViJ9

The link says: "Some third-party packages don't compile their code to ES5 before publishing to npm. This often causes problems in the ecosystem because neither browsers (except for most modern versions) nor some tools currently support all ES6 features. We recommend to publish code on npm as ES5 at least for a few more years."

It's a good idea, to build the the code to ES5 too before publish.

Hi. Thank you for providing this useful library.
Unfortunately, I've noticed there was a small problem.

If a constructor doesn't have a string type input parameter, it affects decoding other parameters in functions. I used your given example and just changed constructor part as follow.

• ABI
  ...
  {
  "inputs": [
  { "name": "_masterAuth", "type": "address" },
  { "name": "_name", "type": "uint256"} // changed from "string" to "uint256"
  ],
  "payable": false,
  "type": "constroctor"
  },
  ...

• Decoding Result after ABI change
  {
  "types": [
  "address",
  "uint256"
  ],
  "inputs": [
  "0x00000000000000000000000000000000000000a0",
  {
  "_bn": "f3df64775a2dfb6bc9e09dced96d0816ff5055bf95da13ce5b6c3f53b97071c8"
  }
  ]
  }

• Expected Result
  {
  "name": "registerOffChainDonation",
  "types": [
  "address",
  "uint256",
  "uint256",
  "string",
  "bytes32"
  ],
  ...

I think this happens at line 49 "ethers.Interface.decodeParams(types, data)" in https://github.com/miguelmota/ethereum-input-data-decoder/blob/master/index.js
I wrapped this part with try-catch, it seems to work well but I don't convince this is a right way to avoid the error.
Could you please take a look?
Thanks,

I'm getting the above error when I do in a javascript jupyter notebook:

const result = decoder.decodeData('0x........');
/path/to/myproject/node_modules/ethereum-input-data-decoder/dist/index.js:89
      var result = this.abi.reduce(function (acc, obj) {
                            ^

TypeError: this.abi.reduce is not a function
    at InputDataDecoder.decodeData (/path/to/myproject/node_modules/ethereum-input-data-decoder/dist/index.js:89:29)
    at evalmachine.<anonymous>:1:24
    at Script.runInThisContext (vm.js:91:20)
    at Object.runInThisContext (vm.js:298:38)
    at run ([eval]:1002:15)
    at onRunRequest ([eval]:829:18)
    at onMessage ([eval]:789:13)
    at process.emit (events.js:182:13)
    at emit (internal/child_process.js:807:12)
    at process._tickCallback (internal/process/next_tick.js:63:19)

I'm using version 0.0.12 of ethereum-input-data-decoder

Could this be because I'm using latest solc ?
One of the attributes of the decoder is listed as follows :

compiler: 
      { name: 'solc',
        version: '0.4.24+commit.e67f0147.Emscripten.clang' }

I'll try to see if I have ABI generated using older version of solc

Hi, I am trying to decode a simplestorage contract i've deployed, but getting back blank when trying to decode the data string.

my smart contract

pragma solidity ^0.4.18;

contract simplestorage { 
    uint public storedData; 
    
    function simplestorage(uint initVal) public { 
        storedData = initVal; 
    } 
    
    function set(uint x) public { 
        storedData = x; 
    } 
    
    function get() public constant returns (uint retVal) { 
        return storedData; 
    } 
}

ABI (in abi.json file)
[{"constant":true,"inputs":[],"name":"storedData","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"x","type":"uint256"}],"name":"set","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"get","outputs":[{"name":"retVal","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[{"name":"initVal","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"}]

DATA:

"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"

commands executed:

d = new InputDataDecoder('//abi.json');
data="DATAFROMABOVE";
res = d.decodeData(data);
{} <-- THIS IS MY OUTPUT

What am i doing wrong here?

0.3.5 release broke something

Error: src/update.ts(55,30): error TS2351: This expression is not constructable.
  Type 'typeof import("/home/runner/work/lost-robbies/lost-robbies/node_modules/ethereum-input-data-decoder/index")' has no construct signatures.
Error: src/update.ts(93,30): error TS2351: This expression is not constructable.
  Type 'typeof import("/home/runner/work/lost-robbies/lost-robbies/node_modules/ethereum-input-data-decoder/index")' has no construct signatures.
Error: src/update.ts(178,34): error TS2351: This expression is not constructable.
  Type 'typeof import("/home/runner/work/lost-robbies/lost-robbies/node_modules/ethereum-input-data-decoder/index")' has no construct signatures.

var inputDataDecoder = new InputDataDecoder(await getAbi());

Not sure what the issue is, didn't debug. Probably eb5bc44. Locking back at 0.3.4 works.

To repro, check out https://github.com/dblock/lost-robbies, bump version in package.json, npm install and npm run sales.

this is an example to reproduce this issue:

pragma solidity >=0.8.0 <0.9.0;
contract Example  {
    
    function foo(string[2] calldata a, uint[2] calldata b) external returns (address) {
        return msg.sender;
    }
}

if you compile this Smart Contract, deploy it to a network and call the foo function, then pasting the abi and the transaction's input data in https://lab.miguelmota.com/ethereum-input-data-decoder/example/
will produce unexpected results,
as shown in the image

if it may be helpful the input data I passed to the transaction were:

a: [  "92bf076a-2b42-4df3-a74b-ee9f457225b8","7ee5645d-bd02-4526-ab69-039a1a54731f"]
b: [   "9",   "70" ]

This isn't really an issue but if you have 5 minutes, I'd be very keen to hear how the decodeData method works (high level explanation) and what the ethereumjs-abi library was created for. I'm new to Ethereum and I'm still struggling to wrap my head around the input field of transactions.

Hi there,

I would like to try to decode the input data for dydx PayableProxyForSoloMargin contract (see the one in mainnet at https://etherscan.io/address/0xa8b39829cE2246f89B31C013b8Cde15506Fb9A76). Using the abi (or see below)

[{"constant":true,"inputs":[],"name":"SOLO_MARGIN","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"WETH","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"components":[{"name":"owner","type":"address"},{"name":"number","type":"uint256"}],"name":"accounts","type":"tuple[]"},{"components":[{"name":"actionType","type":"uint8"},{"name":"accountId","type":"uint256"},{"components":[{"name":"sign","type":"bool"},{"name":"denomination","type":"uint8"},{"name":"ref","type":"uint8"},{"name":"value","type":"uint256"}],"name":"amount","type":"tuple"},{"name":"primaryMarketId","type":"uint256"},{"name":"secondaryMarketId","type":"uint256"},{"name":"otherAddress","type":"address"},{"name":"otherAccountId","type":"uint256"},{"name":"data","type":"bytes"}],"name":"actions","type":"tuple[]"},{"name":"sendEthTo","type":"address"}],"name":"operate","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"inputs":[{"name":"soloMargin","type":"address"},{"name":"weth","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"}]

I tried to decode it using a random transaction (say https://etherscan.io/tx/0x45a3c960ced0ed51562936e50e1a7473eb31c9a85f72d0aa4783aa271677eb44) but unfortunately it's not able to give me all input parameters in operate() function:

{ "method": null, "types": [ "address", "address" ], "inputs": [ "0xa8b39829cE2246f89B31C013b8Cde15506Fb9A76", "0x0000000000000000000000000000000000000000" ], "names": [ "soloMargin", "weth" ] }

The online tool (https://lab.miguelmota.com/ethereum-input-data-decoder/example/) yielded the same.

I believe it's related to the complex tuple hierarchies at the 1st and 2nd arguments (i.e. Account.Info[] memory accounts and Actions.ActionArgs[] memory actions).

I used python's web3py function (decode_function_input()) to do the same and it worked correctly:

(<Function operate(tuple[],tuple[],address)>, {'accounts': [('0xb929044aF6a7B7AE12EF0e653ACC59f73cf9577B', 0)], 'actions': [(0, 0, (True, 0, 0, 487620457500000000), 0, 0, '0xa8b39829cE2246f89B31C013b8Cde15506Fb9A76', 0, b'')], 'sendEthTo': '0xb929044aF6a7B7AE12EF0e653ACC59f73cf9577B'})

Just wonder if this needs to be fixed.

Hello!

Thank you for this really helpful library!

I have a question, I used the ABI and decoder to decode a transaction input and it worked great! However, one of the input properties was a bytes32 Buffer. I would like to know how I further decode that value so I can see it as a string or a human-readable blob of data.

Is this something that I can recursively decode using this library somehow?

Hi,
Is this supposed to work with ABI generated from Truffle? See problem code below.

// tx =  https://rinkeby.etherscan.io/tx/0xdd387a53ac20c30a47689d79f1a1650623eb1c2afa590a1b3cbb6a30bf3abef9

const InputDataDecoder = require('ethereum-input-data-decoder')
// ABI  json from Truffle is here: https://gist.github.com/lakamsani/4ab20d3a60024303861568219c8ab121
const json = require('./build/contracts/PulseToken.json')
const decoder = new InputDataDecoder(json.abi)
// web3 is set to rinkeby
const tx = web3.eth.getTransaction('0xdd387a53ac20c30a47689d79f1a1650623eb1c2afa590a1b3cbb6a30bf3abef9')

// const data = tx.input 
const data = `0x23b872dd00000000000000000000000008aba4448bf7ee5ba13c5f4797ffe653d11c6c02000000000000000000000000d4f1a493787a29d38c216f592d4a1c84d89caad10000000000000000000000000000000000000000000000008ac7230489e80000`
const result = decoder.decodeData(data)
console.log(result)
{ name: null, types: [], inputs: [] }

Hi, I have been using this library successfully and its works great but have hit a small problem when trying to decode a transactions on live.

This transaction in question is this: https://etherscan.io/tx/0x94fadf5f5c7805b8ceb8a13a0a7fbce06054ff08cdfdc2fd555a7902592aebe6

Interestingly enough etherscan also fails to decode the inputs and you can see the error in the browser console.

I actually noticed this in a backend service which we use this library to decode txs for specific addresses.

The error is Decoded int exceeds width: 160 vs 256

I guess the reason is that the data provided to args two _address is of the wrong type/length.

Got any ideas on how to check for this and order handle it?

Any help would be appreciated.

Thanks

James

Hi there,
Your tool looks super helpful and interesting and is explained really well. I managed to get it to work on my react website without any error. However, all the decoded output I get looks like this:

{
"method": null,
"types": [],
"inputs": [],
"names": []
}

I used my ABI and the input data that I want to decode on your demo website as well and still I get the same output. I double checked that I'm using the correct .json file from my artefacts folder. Any ideas what it could be? Can I maybe vary the input format of my txRequest.input? Any other ideas? Could it be a padding issue? Cheers :)

I tried to get abi by the following code:

const InputDataDecoder = require('ethereum-input-data-decoder');
let contractABI = "http://api.bscscan.com/api?module=contract&action=getabi&address=" + contract + "&format=raw&" + myAPI;
contractABI = await fetch(contractABI);
contractABI = await contractABI.text();
let abi = [contractABI];
console.log(abi);
const decoder = new InputDataDecoder(abi);

And I get the abi value before decoder: (bsc cake token)
[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegator","type":"address"},{"indexed":true,"internalType":"address","name":"fromDelegate","type":"address"},{"indexed":true,"internalType":"address","name":"toDelegate","type":"address"}],"name":"DelegateChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegate","type":"address"},{"indexed":false,"internalType":"uint256","name":"previousBalance","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newBalance","type":"uint256"}],"name":"DelegateVotesChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"DELEGATION_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DOMAIN_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint32","name":"","type":"uint32"}],"name":"checkpoints","outputs":[{"internalType":"uint32","name":"fromBlock","type":"uint32"},{"internalType":"uint256","name":"votes","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"delegatee","type":"address"}],"name":"delegate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"delegatee","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"delegateBySig","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"delegator","type":"address"}],"name":"delegates","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"getCurrentVotes","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"blockNumber","type":"uint256"}],"name":"getPriorVotes","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"mint","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"numCheckpoints","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

Then input data:

const data = '0xa9059cbb000000000000000000000000e84279f943429b4be5a2345fbd6ff8402059ae91000000000000000000000000000000000000000000000001152023b31fc68000';
const result = decoder.decodeData(data);
console.log("result: " + result);

The result I got:
[object Object]
It seems it is not the right way to get it or something is wrong?