(function (exports) {
  var Bitcoin = exports;

  if ('object' !== typeof module) {
    Bitcoin.EventEmitter = EventEmitter;
  }
})(
  'object' === typeof module ? module.exports : (window.Bitcoin = {})
);

/*
  function makeKeypair()
  {
	  // Generate private key
	  var n = ecparams.getN();
	  var n1 = n.subtract(BigInteger.ONE);
	  var r = new BigInteger(n.bitLength(), rng);
	  
	  var privateKey = r.mod(n1).add(BigInteger.ONE);
	  
	  // Generate public key
	  var G = ecparams.getG();
	  var publicPoint = G.multiply(privateKey);

	  return {priv: privateKey, pubkey: publicPoint};
  };

  function serializeTransaction(tx)
  {
	  var buffer = [];
	  buffer = buffer.concat(Crypto.util.wordsToBytes([parseInt(tx.version)]));
	  buffer = buffer.concat(numToVarInt(tx.ins.length));
	  for (var i = 0; i < tx.ins.length; i++) {
		  var txin = tx.ins[i];
		  buffer = buffer.concat(Crypto.util.base64ToBytes(txin.outpoint.hash));
		  buffer = buffer.concat(Crypto.util.wordsToBytes([parseInt(txin.index)]));
		  var scriptBytes = Crypto.util.base64ToBytes(txin.script);
		  buffer = buffer.concat(numToVarInt(scriptBytes.length));
		  buffer = buffer.concat(scriptBytes);
		  buffer = buffer.concat(Crypto.util.wordsToBytes([parseInt(txin.sequence)]));
	  }
	  buffer = buffer.concat(numToVarInt(tx.outs.length));
	  for (var i = 0; i < tx.outs.length; i++) {
		  var txout = tx.outs[i];
		  var valueHex = (new BigInteger(txout.value, 10)).toString(16);
		  while (valueHex.length < 16) valueHex = "0" + valueHex;
		  buffer = buffer.concat(Crypto.util.hexToBytes(valueHex));
		  var scriptBytes = Crypto.util.base64ToBytes(txout.script);
		  buffer = buffer.concat(numToVarInt(scriptBytes.length));
		  buffer = buffer.concat(scriptBytes);
	  }
	  buffer = buffer.concat(Crypto.util.wordsToBytes([parseInt(tx.lock_time)]));
	  
	  return buffer;
  };

  var OP_CODESEPARATOR = 171;

  var SIGHASH_ALL = 1;
  var SIGHASH_NONE = 2;
  var SIGHASH_SINGLE = 3;
  var SIGHASH_ANYONECANPAY = 80;

  function hashTransactionForSignature(scriptCode, tx, inIndex, hashType)
  {
	  // TODO: We need to actually deep copy here
	  var txTmp = tx;

	  // In case concatenating two scripts ends up with two codeseparators,
    // or an extra one at the end, this prevents all those possible incompatibilities.
	  scriptCode = scriptCode.filter(function (val) {
		  return val !== OP_CODESEPARATOR;
	  });
	  
    // Blank out other inputs' signatures
    for (var i = 0; i < txTmp.ins.length; i++) {
    	txTmp.ins[i].script = Crypto.util.bytesToBase64([]);
    }
    txTmp.ins[inIndex].script = Crypto.util.bytesToBase64(scriptCode);

    // Blank out some of the outputs
    if ((hashType & 0x1f) == SIGHASH_NONE) {
    	txTmp.outs = [];

      // Let the others update at will
      for (var i = 0; i < txTmp.ins.length; i++)
        if (i != inIndex)
          txTmp.ins[i].sequence = 0;
    } else if ((hashType & 0x1f) == SIGHASH_SINGLE) {
      // TODO: Implement
    }

    // Blank out other inputs completely, not recommended for open transactions
    if (hashType & SIGHASH_ANYONECANPAY) {
      txTmp.ins = [txTmp.ins[inIndex]];
    }
    
	  var buffer = serializeTransaction(txTmp);
	  
	  buffer.concat(Crypto.util.wordsToBytes([parseInt(hashType)]));

    console.log(buffer);
	  
	  return Crypto.SHA256(Crypto.SHA256(buffer, {asBytes: true}), {asBytes: true});
  };

  function verifyTransactionSignature(tx) {
	  var hash = hashTransactionForSignature([], tx, 0, 0);
	  return Crypto.util.bytesToHex(hash);
  };

  function numToVarInt(i)
  {
	  // TODO: THIS IS TOTALLY UNTESTED!
	  if (i < 0xfd) {
		  // unsigned char
		  return [i];
	  } else if (i <= 1<<16) {
		  // unsigned short (LE)
		  return [0xfd, i >>> 8, i & 255];
	  } else if (i <= 1<<32) {
		  // unsigned int (LE)
		  return [0xfe].concat(Crypto.util.wordsToBytes([i]));
    } else {
		  // unsigned long long (LE)
		  return [0xff].concat(Crypto.util.wordsToBytes([i >>> 32, i]));
    }
  };

  var testTx = {
	  "version":"1",
	  "lock_time":"0",
	  "block": {
		  "hash":"N/A",
		  "height":115806
	  },
	  "index":6,
	  "hash":"WUFzjKubG1kqfJWMb4qZdlhU2F3l5NGXN7AUg8Jwl14=",
	  "ins":[{
		  "outpoint":{
			  "hash":"nqcbMM1oRhfLdZga11q7x0CpUMujm+vtxHXO9V0gnwE=",
			  "index":0
		  },
		  "script":"RzBEAiB2XXkx1pca9SlfCmCGNUVf+h2sAFBttcxG1VnypIcvEgIgXrOp7LSdYBYp3nPsQAz8BOLD3K4pAlXfZImP1rkzk2EBQQRi7NcODzNfnVqLtG79Axp5UF6EhFIhCmzqKqssfKpfCIOmzCuXEeDFUFvFzeGLJx5N+wp2qRS1TqYezGD3yERk",
		  "sequence":4294967295
	  }],
	  "outs":[{
		  "value":"3000000000",
		  "script":"dqkUBLZwqhAPRVgZvwI8MN5gLHbU8NOIrA=="
	  },{
		  "value":"25937000000",
		  "script":"dqkUQ82gJ0O5vOBg6yK5/yorLLV5zLKIrA=="
	  }]
  };

   TODO: Make this stuff into test cases ;)
   $(function () {
	 var key = new Bitcoin.ECKey(Crypto.util.hexToBytes("5c0b98e524ad188ddef35dc6abba13c34a351a05409e5d285403718b93336a4a"));
	 key = new Bitcoin.ECKey(Crypto.util.hexToBytes("180cb41c7c600be951b5d3d0a7334acc7506173875834f7a6c4c786a28fcbb19"));
	 //console.log(key.getBitcoinAddress().toString());
	 //var message = Crypto.util.hexToBytes("2aec28d323ee7b06a799d540d224b351161fe48967174ca5e43164e86137da11");
	 //message = [0];
	 //var out = key.sign(message);
	 //console.log("pubkey: "+Crypto.util.bytesToHex(key.getPub()));
	 //console.log("sig: "+Crypto.util.bytesToHex(out));

	 //console.log(key.verify(message, out));

	 //console.log(Bitcoin.ECDSA.verify(message, Crypto.util.hexToBytes("3046022100dffbc26774fc841bbe1c1362fd643609c6e42dcb274763476d87af2c0597e89e022100c59e3c13b96b316cae9fa0ab0260612c7a133a6fe2b3445b6bf80b3123bf274d"), Crypto.util.hexToBytes("0401de173aa944eacf7e44e5073baca93fb34fe4b7897a1c82c92dfdc8a1f75ef58cd1b06e8052096980cb6e1ad6d3df143c34b3d7394bae2782a4df570554c2fb")));

	 //console.log(Bitcoin.ECDSA.verify(Crypto.util.hexToBytes("230aba77ccde46bb17fcb0295a92c0cc42a6ea9f439aaadeb0094625f49e6ed8"), Crypto.util.hexToBytes("3046022100a3ee5408f0003d8ef00ff2e0537f54ba09771626ff70dca1f01296b05c510e85022100d4dc70a5bb50685b65833a97e536909a6951dd247a2fdbde6688c33ba6d6407501"),Crypto.util.hexToBytes("04a19c1f07c7a0868d86dbb37510305843cc730eb3bea8a99d92131f44950cecd923788419bfef2f635fad621d753f30d4b4b63b29da44b4f3d92db974537ad5a4")));
	 //console.log(Bitcoin.ECDSA.verify(Crypto.util.hexToBytes("c2c75bb77d7a5acddceb1d45ceef58e7451fd0d3abc9d4c16df7848eefafe00d"), Crypto.util.hexToBytes("3045022100ff9362dadcbf1f6ef954bc8eb27144bbb4f49abd32be1eb04c311151dcf4bcf802205112c2ca6a25aefb8be98bf460c5a9056c01253f31e118d80b81ec9604e3201a01"),Crypto.util.hexToBytes("04fe62ce7892ec209310c176ef7f06565865e286e8699e884603657efa9aa51086785099d544d4e04f1f7b4b065205c1783fade8daf4ba1e0d1962292e8eb722cd")));
   });
   //
*/