Cleanup the sync

Add syncstate to status call
Remove old sync logic

Signed-off-by: Mark Beamer Jr <markbeamerjr@gmail.com>

server/utils/chainquery/util.js

@@ -0,0 +1,57 @@
+
+// taken from https://github.com/crypto-browserify/buffer-reverse/blob/master/inplace.js
+function reverseInplace (buffer) {
+  for (var i = 0, j = buffer.length - 1; i < j; ++i, --j) {
+    var t = buffer[j];
+
+    buffer[j] = buffer[i];
+    buffer[i] = t;
+  }
+
+  return buffer;
+}
+
+function ripemd160 (bytearray) {
+  const crypto = require('crypto');
+
+  const secret = 'abcdefg';
+  const hash = crypto.createHash('ripemd160', secret)
+    .update(bytearray, 'binary', 'binary')
+    .digest();
+  return hash;
+}
+
+function sha256 (bytearray) {
+  const crypto = require('crypto');
+
+  const secret = 'abcdefg';
+  const hash = crypto.createHash('sha256', secret)
+    .update(bytearray, 'binary', 'binary')
+    .digest();
+  return hash;
+}
+
+export function OutpointToClaimId (outpointstr) {
+  var outpointsplit = outpointstr.split(':');
+  var outpoint = {txid: outpointsplit[0], vout: outpointsplit[1]};
+  // Assuming endianess is LittleEndian - Javacsript endianess depends on hardware.
+  // Can check with os.endianness(). Possible values are "BE" or "LE" as of Node.js v0.10.0
+  // convert txid to byte array then reverse bytes to get BigEndian
+  var txidbytes = Buffer.from(outpoint.txid, 'hex');
+  var txidrevbytes = reverseInplace(txidbytes);
+  // Get big endian of vout(uint32)
+  var voutbytes = Buffer.allocUnsafe(4);
+  voutbytes.writeInt32BE(outpoint.vout);
+  // Merge arrays
+  var claimidbytes = Buffer.concat([txidrevbytes, voutbytes]);
+  // Hash - Sha256
+  claimidbytes = sha256(claimidbytes);
+  // Hash - RipeMD160
+  claimidbytes = ripemd160(claimidbytes);
+  // Return to little endian.
+  claimidbytes = reverseInplace(claimidbytes);
+  // Encode to hex string
+  var claimid = claimidbytes.toString('hex');
+
+  return claimid;
+}