elliptic.js

elliptic.js

// elliptic.js

var EC = require('elliptic').ec
var ec = new EC('secp256k1')

var point = ec.g.mul('f2cc9d2b008927db94b89e04e2f6e70c180e547b3e5e564b06b8215d1c264b53')
// <EC Point x: 495f99aa21d7e60ff3f065f2a14e67612b29b1cb5af7b7fc4738cede6f2d9eba y: 41a2d4539b40a914e755a3a24367ce731195c354480dad4f2ce9e9c8f8003bce>

var point1 = e.curve.pointFromX(true, '495f99aa21d7e60ff3f065f2a14e67612b29b1cb5af7b7fc4738cede6f2d9eba')
// <EC Point x: 495f99aa21d7e60ff3f065f2a14e67612b29b1cb5af7b7fc4738cede6f2d9eba y: 3dc9318f0a7ae59bafbccef98692931dc6a8c28208333e88de5c031766f70777>

var point2 = e.curve.pointFromX(false, '495f99aa21d7e60ff3f065f2a14e67612b29b1cb5af7b7fc4738cede6f2d9eba')
// <EC Point x: 495f99aa21d7e60ff3f065f2a14e67612b29b1cb5af7b7fc4738cede6f2d9eba y: c236ce70f5851a6450433106796d6ce239573d7df7ccc17721a3fce79908f4b8>

var keypair = e.keyPair('f2cc9d2b008927db94b89e04e2f6e70c180e547b3e5e564b06b8215d1c264b53')
// <Key priv: f2cc9d2b008927db94b89e04e2f6e70c180e547b3e5e564b06b8215d1c264b53 pub: null >

var pub = keypair.getPublic(true, 'hex')
// incorrect pub: '02495f99aa21d7e60ff3f065f2a14e67612b29b1cb5af7b7fc4738cede6f2d9eba'


// bitcoinjs

var bitcoinjs = require('bitcoinjs-lib');

var eckey = bitcoinjs.ECKey.fromWIF('L5MgSwNB2R76xBGorofRSTuQFd1bm3hQMFVf3u2CneFom8u1Yt7G')
var priv = eckey.d.toHex()
// 'f2cc9d2b008927db94b89e04e2f6e70c180e547b3e5e564b06b8215d1c264b53'

var pub = eckey.pub.toHex()
// currect pub: '03e275faa35bd1e88f5df6e8f9f6edb93bdf1d65f4915efc79fd7a726ec0c21700'


// lookup the associated address of the different results

var bitcore = require('bitcore');
var PublicKey = bitcore.PublicKey;
var Address = bitcore.Address;

var address = new Address.fromPublicKey(new PublicKey('03e275faa35bd1e88f5df6e8f9f6edb93bdf1d65f4915efc79fd7a726ec0c21700'));
// <Address: 19FKem9YKbszEwsXRLw9WnkggMQrdLbAhE, type: pubkeyhash, network: livenet>

var address1 = new Address.fromPublicKey(new PublicKey('02495f99aa21d7e60ff3f065f2a14e67612b29b1cb5af7b7fc4738cede6f2d9eba'));
// <Address: 1279WAo1PmBoYmu12UeQdsGN2ZqPqPuCzb, type: pubkeyhash, network: livenet>


// bitcoin-qt debug window

importprivkey "L5MgSwNB2R76xBGorofRSTuQFd1bm3hQMFVf3u2CneFom8u1Yt7G"
dumpprivkey "19FKem9YKbszEwsXRLw9WnkggMQrdLbAhE"
// outputs: L5MgSwNB2R76xBGorofRSTuQFd1bm3hQMFVf3u2CneFom8u1Yt7G
dumpprivkey "1279WAo1PmBoYmu12UeQdsGN2ZqPqPuCzb"
// outputs "Private key for address 1279WAo1PmBoYmu12UeQdsGN2ZqPqPuCzb is not known (code -4)"