import * as crypto from "@node-lightning/crypto" ; import { Wif } from "." ; import { BitcoinError } from "./BitcoinError" ; import { BitcoinErrorCode } from "./BitcoinErrorCode" ; import { Network } from "./Network" ; import { PublicKey } from "./PublicKey" ; /**
 * This class encapsulates a 32-byte buffer containing a big-endian
 * encoded number between 0x1 and
 * 0xfffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364140
 * that is a private key for the secp256k1 elliptic curve.
 */ export class PrivateKey { param input returns throw BitcoinError Throws for invalid network prefix or
     * invalid private or public keys.
      public static fromWif ( input ) { const decoded = Wif . decode ( input ) ; const network = Wif . decodePrefix ( decoded . prefix ) ; const prvkey = new PrivateKey ( decoded . privateKey , network ) ; const pubkey = prvkey . toPubKey ( decoded . compressed ) ; return [ prvkey , pubkey ] ; } private _buffer : Buffer ; param buffer param network constructor ( buffer , readonly network ) { if ( ! crypto . validPrivateKey ( buffer ) ) { throw new BitcoinError ( BitcoinErrorCode . InvalidPrivateKey , { key : buffer } ) ; } this . _buffer = buffer ; } returns public toBuffer ( ) { return this . _buffer ; } /**
     * Converts the instance into a big-endian encoded hex string
     */ public toHex ( ) { return this . _buffer . toString ( "hex" ) ; } /**
     * Converts the private key into the corresponding public key
     */ public toPubKey ( compressed ) { const result = crypto . getPublicKey ( this . _buffer , compressed ) ; return new PublicKey ( result , this . network ) ; } /**
     * Converts the private key to WIF
     */ public toWif ( compressed ) { return Wif . encode ( this . network . wifPrefix , this . _buffer , compressed ) ; } param tweak returns public tweakAdd ( tweak ) { const result = crypto . privateKeyTweakAdd ( this . _buffer , tweak ) ; return new PrivateKey ( result , this . network ) ; } param tweak returns public tweakMul ( tweak ) { const result = crypto . privateKeyTweakMul ( this . _buffer , tweak ) ; return new PrivateKey ( result , this . network ) ; } }