Can not run any ethers.utils functions.

[zydjohnHotmail]

Ethers Version

6.4.0

Search Terms

toUtf8Bytes, keccak256

Describe the Problem

I want to run some simple code in Node.js, but the code failed. However, from ethers playground, the code works: message = "Hello World";
"Hello World"
messageBytes = ethers.utils.toUtf8Bytes(message);
Uint8Array { 72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100 }
ethers.utils.keccak256(messageBytes);
"0x592fa743889fc7f92ac2a37bb1f5ba1daf2a5c84741ca0e0061d243a2e6707ba"

Code Snippet

import { ethers } from 'ethers';

const message = "Hello World";
const messageBytes = ethers.utils.toUtf8Bytes(message);
console.log(messageBytes);
const messageDigest = ethers.utils.keccak256(messageBytes);

console.log("Digest: " + messageDigest);

Contract ABI

No response

Errors

E:\npms\ethers>node test-ethers.js
file:///E:/npms/ethers/test-ethers.js:4
const messageBytes = ethers.utils.toUtf8Bytes(message);
                                  ^

TypeError: Cannot read properties of undefined (reading 'toUtf8Bytes')
    at ←[90mfile:///E:/npms/ethers/←[39mtest-ethers.js:4:35
←[90m    at ModuleJob.run (node:internal/modules/esm/module_job:192:25)←[39m

Node.js v20.2.0

E:\npms\ethers> 
The following is the package.json file: 
E:\npms\ethers>type package.json
{
  "name": "ethers",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "type": "module",
  "dependencies": {
    "ethers": "^6.4.0"
  }
}

Environment

node.js (v12 or newer)

Environment (Other)

Windows 10, tested on node.js v18.16.0 and v20.2.0; both have the same errors.

[ricmoo]

In v6, all utility functions are available on the root, so you should use ethers.keccak256 and ethers.toUtf8Bytes. :)

[ricmoo]

(the playground still uses v5, but is being updated for v6)

[zydjohnHotmail]

Thanks for your quick reply, I tested, it works. However, there is one function abiCoder(), is it also in root or still in utils, like this: const abiCoder = new ethers.utils.abiCoder();

[ricmoo]

You can use ethers.AbiCoder.defaultAbiCoder() to get a singleton AbiCoder. :)

By using a method to get the shared instance, it means we only instantiate it if necessary.

[zydjohnHotmail]

Hi, thanks for your reply. I have some code, which is not working.
const abiCoder = ethers.AbiCoder.defaultAbiCoder();
const outputNames = method.outputs.map((output) => output.name);
console.log(outputNames);
const outputTypes = method.outputs.map((output) => output.type);
console.log(data);
console.log(outputTypes);
const decodedParams = abiCoder.decode(outputTypes, data);
console.log(decodedParams);
=> The data is like the following:
outputNames = [ 'didSetResult', 'oracleAddress' ]
data = 00000000000000000000000000000000000000000000000000000000000000010000000000000000000000009ece13d31f24b1c45107924f9c3fda2eb55eeda7
outputTypes = [ 'bool', 'address' ]
I got error using abiCoder.decode(outputTypes, data): Error: invalid BytesLike value (argument="value", value="00000000000000000000000000000000000000000000000000000000000000010000000000000000000000009ece13d31f24b1c45107924f9c3fda2eb55eeda7", code=INVALID_ARGUMENT, version=6.4.0)
Is it possible to run the above code in ethers playground to get some result? Let me know if there is any issue with the test data or my code?
Thanks,

[ricmoo]

Your data must be a string (I think you just forgot the quotes above when typing that) and must begin with a 0x.

[zydjohnHotmail]

Hi, let me know how can I run the above code in ethers playground, I tried this, but not working: outputTypes = "[ 'bool', 'address' ]"
"[ 'bool', 'address' ]"
data = '0x00000000000000000000000000000000000000000000000000000000000000010000000000000000000000009ece13d31f24b1c45107924f9c3fda2eb55eeda7'
"0x00000000000000000000000000000000000000000000000000000000000000010000000000000000000000009ece13d31f24b1c45107924f9c3fda2eb55eeda7"
ethers.utils.decode(outputTypes, data)
"ethers.utils.decode is not a function"
abiCoder = new ethers.utils.abiCoder();
"ethers.utils.abiCoder is not a constructor"
ethers.utils.abiCoder.decode(outputTypes, data)
"Cannot read properties of undefined (reading 'decode')"

[zydjohnHotmail]

Hi, I have figured this out:
abiCoder = ethers.utils.defaultAbiCoder;
AbiCoder {
coerceFunc: null
}
abiCoder.decode(outputTypes, data)
"types.map is not a function"
outputTypes = ['bool', 'address'];
[ "bool", "address" ]
abiCoder.decode(outputTypes, data)
[ true, "0x9Ece13D31f24B1c45107924F9C3fDa2eB55eEda7" ]
Thanks for your quick reply!