Compressed pubkey output is confirmed working, remove TODO, add comments.

Author: justmoon

src/ecdsa.js

@@ -24,12 +24,17 @@ ECPointFp.prototype.getEncoded = function (compressed) {
 
  if (compressed) {
  if (y.isEven()) {
+ // Compressed even pubkey
+ // M = 02 || X
  enc.unshift(0x02);
  } else {
+ // Compressed uneven pubkey
+ // M = 03 || X
  enc.unshift(0x03);
  }
- // TODO: Implement
  } else {
+ // Uncompressed pubkey
+ // M = 04 || X || Y
  enc.unshift(0x04);
  enc = enc.concat(integerToBytes(y, 32));
  }