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I am trying to implement my wallet using ed25519 curve, i was using tweetnacl from this link "https://github.com/dchest/tweetnacl-js" its working, But i want to generate deterministic key-pair creation from the 12 word seed.similar to eth-lightwallet/metamask. How i can create it,using edd25519 curve need help.

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you can use function: nacl.sign.keyPair.fromSeed(seed)

For generating random seed, use npm package bip39

https://github.com/bitcoinjs/bip39

Usage:

// Generate a random mnemonic (12 words) (uses crypto.randomBytes under the hood)

var mnemonic = bip39.generateMnemonic()

// Convert 12 word mnemonic to 32 byte seed

bip39.mnemonicToSeed(mnemonic)

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