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61 lines
1.9 KiB
Markdown
61 lines
1.9 KiB
Markdown
NIP-XX
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======
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Nostr specific keys from Ethereum wallet signatures
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----------------------------------------------------
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`draft` `optional` `author:0xc0de4c0ffee` `author:sshmatrix`
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This NIP ?is optional specification for Nostr clients to generate private key from deterministic Ethereum wallet signatures.
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A) Username :
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```
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let username = "mypetname" || "mynip05@domain.eth.limo" || "domain.eth.limo" || "sub.domain.eth.limo"
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```
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1) `mypetname` is NIP02 compatible name
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2) `mynip05@domain.eth.limo` is NIP05 compatible ID
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3) `domain.eth.limo` is NIP05 equivalent to `_@domain.eth.limo`
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4) `sub.domain.eth.limo` is NIP05 equivalent to `_@sub.domain.eth.limo`
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~~Implementing clients should verify if generated public keys match NIP05 and NIP02 records.~~
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B) Message :
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```
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let message = `Login to Nostr as ${username}\n\nWARNING : DO NOT SIGN THIS REQUEST FROM UNTRUSTED NOSTR CLIENTS.\n${checksum(wallet.address)}`
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```
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C) Private Key :
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```js
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import { hkdf } from '@noble/hashes/hkdf';
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import { sha256 } from '@noble/hashes/sha256';
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import * as secp256k1 from '@noble/secp256k1';
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let username = 'name@domain.eth.limo';
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let optPassword = "horse staple battery";
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// optional pin/password
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let address = wallet.getAddress();
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// get checksum'd address from eth wallet
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let signature = wallet.signMessage(message);
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// request signature from eth wallet
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// 0x + bytes1 + bytes32 + bytes32
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// 2 + (2 + 64 + 64) = 132 length
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let inputKey = sha256(signature);
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let salt = sha256(`nostr:${username}:${optPassword}:${signature.slice(68)}`); //68~132
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// nostr:${username}:${signature.slice(68)}
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let info = `nostr:${username}:${address}`;
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let dkLen = 42; // 32 + 8 + 2
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//FIPS 186 B.4.1 limit must be >=keylen+8
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let hashKey = hkdf(sha256, inputKey, salt, info, dkLen);
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let privKey = nobleSecp256k1.hashToPrivateKey(hashKey);
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//FIPS 186 B.4.1 @noble/secp256k1
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let pubKey = nobleSecp256k1.getPublicKey(privKey)
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``` |