Ethers.js: Missing String.prototype.normalize (React-Native)

[mochixuan]

"dependencies": {
"ethers": "^4.0.4",
"react": "16.5.0",
"react-native": "^0.57.0",
"react-navigation": "^2.14.2"
},
"devDependencies": {
"@babel/plugin-proposal-decorators": "^7.0.0",
"babel-jest": "23.6.0",
"babel-preset-react-native": "^4.0.1",
"jest": "23.6.0",
"metro-react-native-babel-preset": "0.45.3",
"react-test-renderer": "16.5.0"
},

I used the production wallet to report an error, but when I opened 'debug js remotely' I was successful and hoped to solve it.

[ricmoo]

React Native is using a very old version of node, so it is missing several feature. I’m working on a shim for RN peeps.

For normalize though, check out the test for the unorm library, which will add normalize to the String prototype.

[mochixuan]

V3.0.15 can be used on the RN, but some Caton, I look forward to the release of the RN version, because there is no better plug-in to adapt to the RN, I am looking forward to the application of this plug-in to the RN.

[24thsaint]

+1 also having this error here.

[sianlasaga]

downgrading ethers to ^3.0.27 seems to work fine.

[24thsaint]

@sianlasaga Thanks! Downgrade to ^3.0.27 solves the problem.

(For anyone who happens to stumble, here is the v3 documentation of ethersJS: https://docs.ethers.io/ethers.js/v3.0/html/)

[ricmoo]

Can you see if the following fixes your issue?

Install into your RN package:

npm install unorm

And in your app.js, add:

import "unorm";

This should polyfil the missing functionality. I guess React Native is using a very old version of node for its V8 engine?

[24thsaint]

Can confirm. Adding unorm also fixes the issues.

Thank you very much! :+1:

[ricmoo]

Heya! So, I think I've solved the RN issues... Can you upgrade to 4.0.9 and try:

// Import the required shims
import 'ethers/dist/shims.js';

// Import the ethers library
import { ethers } from 'ethers';

Notes: https://docs.ethers.io/ethers.js/html/cookbook-react.html

[ricmoo]

The new shims in 4.0.10 should fix this in React Native. :)

Please try it out and let me know.

[ricmoo]

I’ve heard from a few people now that the shins.js has resolved their Haste issues. If this is still a problem though, please re-open.

Thanks! :)

[bachlongkocanh]

Hi every body, use new shim of etherjs create hdNode very slow.

[ricmoo]

@bachlongkocanh How slow? Also, which operation is slow? The derivePath, fromExtendedKey or instantiation?

[bachlongkocanh]

@ricmoo I use derivePath.
my code:
var Path = "m/44'/60'/0'/0/0"; var seed = ethers.utils.HDNode.mnemonicToSeed(wordlist); let hdNode = ethers.utils.HDNode.fromMnemonic(wordlist); let node = hdNode.derivePath(Path);

[bachlongkocanh]

I run on Android and it shows that error @ricmoo

[ricmoo]

@bachlongkocanh You will need to include the shims to provide support for String.prototype.normalize. Check out the shims.js in the dist/ folder. :)

[bachlongkocanh]

File shim.js in the dist/ folder

Include file shim.js

And function

Tell me, where is wrong? @ricmoo