22 lines
704 B
JavaScript
22 lines
704 B
JavaScript
var ECDSA = require('../lib/ecdsa');
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var Keypair = require('../lib/keypair');
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var Hash = require('../lib/hash');
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//ECDSA is the signature algorithm used in bitcoin
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//start with a keypair that you will use for signing
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var keypair = Keypair().fromRandom();
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//a message to be signed (normally you would have the hash of a transaction)
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var messagebuf = new Buffer('This is a message I would like to sign');
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//calculate a 32 byte hash for use in ECDSA. one way to do that is sha256.
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var hashbuf = Hash.sha256(messagebuf);
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var sig = ECDSA.sign(hashbuf, keypair);
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//Anyone with the public key can verify
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var pubkey = keypair.pubkey;
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console.log('Valid signature? ' + ECDSA.verify(hashbuf, sig, pubkey));
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