const solanaWeb3 = require("@solana/web3.js");
const solanatoken = require("@solana/spl-token");
var wallet = solanaWeb3.Keypair.generate();
console.log("public key...", wallet.publicKey);
console.log("secret key...", wallet.secretKey);
console.log("secret key...", JSON.stringify(wallet.secretKey.toString()));`enter preformatted text here`
I got
public key... PublicKey {
_bn: <BN: b5ec974285759f4004555c6890e045a4ce857c6a056895d77dd209c054e76556>
secret key... "211,55,244,72,160,174,33,152,24,226,97,172,91,91,47,3,148,83,99,188,150,111,153,248,253,237,31,223,194,194,199,0,181,236,151,66,133,117,159,64,4,85,92,104,144,224,69,164,206,133,124,106,5,104,149,215,125,210,9,192,84,231,101,86"
how I can get private key, like
kNykCXNxgePDjFbDWjPNvXQRa8U12Ywc19dFVaQ7tebUj3m7H4sF4KKdJwM7yxxb3rqxchdjezX9Szh8bLcQAjb
for use on the phantom wallet? docs: https://solana-labs.github.io/solana-web3.js/classes/Keypair.html
for use on the phantom wallet you can copy and paste byte array directly.
If you want the private key in base58, you'll have to do a conversion.
wallet.secretKey gives a Uint8Array: https://solana-labs.github.io/solana-web3.js/classes/Keypair.html#secretKey, so you'll have to convert from Uint8Array to a base58 string.
There are packages to do that, and Solana's web3 package uses bs58: https://github.com/cryptocoinjs/bs58#encodeinput
So you'll have to do bs58.encode(wallet.secretKey) to get the string as you're expecting.
You can change UInt8Array to String like "kNykCXNxgePDjFbDWjPNvXQRa8U12Ywc19dFVaQ7tebUj3m7H4sF4KKdJwM7yxxb3rqxchdjezX9Szh8bLcQAjb" by using bs58.encode() or PublicKey.toBase58();
let secretKey = keyPair.secretKey.toBase58();