From 244af663bb8b01531d64129f88640c43c20b05cd Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Thu, 1 Dec 2016 04:48:00 -0800
Subject: [PATCH] coins: comments.

---
 lib/blockchain/coins.js | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/lib/blockchain/coins.js b/lib/blockchain/coins.js
index cd18e75e..4712c701 100644
--- a/lib/blockchain/coins.js
+++ b/lib/blockchain/coins.js
@@ -191,16 +191,20 @@ Coins.prototype.isEmpty = function isEmpty() {
  * Coins serialization:
  * version: varint
  * height: uint32
- * header-code: varint (31-bit fields | 1-bit coinbase-flag)
+ * header-code: varint
+ *   bit 1: coinbase
+ *   bit 2: first output unspent
+ *   bit 3: second output unspent
+ *   bit 4-32: spent-field size
  * spent-field: bitfield (0=spent, 1=unspent)
  * outputs (repeated):
  *   value: varint
  *   compressed-script:
- *     prefix:
- *             0x00 = 20 byte pubkey hash
+ *     prefix: 0x00 = 20 byte pubkey hash
  *             0x01 = 20 byte script hash
  *             0x02-0x05 = 32 byte ec-key x-value
- *             >=0x06 = varint-size + 10 | raw script
+ *             0x06-0x09 = reserved
+ *             >=0x10 = varint-size + 10 | raw script
  *     data: script data, dictated by the prefix
  *
  * The compression below sacrifices some cpu in exchange