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When I'm trying to create a wallet in react app using the following code:

const seed = bip39.mnemonicToSeed(mnemonic);
const master = bitcoin.HDNode.fromSeedBuffer(seed, "testnet");

I got error: Expected property "0" of type ECPair, got p

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HDNode was removed and is now a separated package.

npm install bip32 See Issue #1243

const bitcoin = require('bitcoinjs-lib')
const bip39 = require('bip39')
const bip32 = require('bip32')

const mnemonic = 'praise you muffin lion enable neck grocery crumble super myself license ghost'
const seed = bip39.mnemonicToSeed(mnemonic)
const node = bip32.fromSeed(seed)

Test examples: bitcoinjs-lib tests

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