Updating the height for blocks

Author: asutoshpalai

README.md

@@ -19,6 +19,12 @@ for block in blockchain.get_unordered_blocks():
     for tx in block.transactions:
         for no, output in enumerate(tx.outputs):
             print("tx=%s outputno=%d type=%s value=%s" % (tx.hash, no, output.type, output.value))
+
+# To get the blocks ordered by height, you need to provide the path of the
+# `index` directory (LevelDB index) being maintained by bitcoind. It contains
+# .ldb files and is present inside the `blocks` directory
+for block in blockchain.get_ordered_blocks(sys.argv[1] + '/index', end=1000):
+    print("height=%d block=%s" % (block.height, block.hash))
 ```
 
 More examples are available in the examples directory.

blockchain_parser/block.py

@@ -38,14 +38,14 @@ class Block(object):
     Represents a Bitcoin block, contains its header and its transactions.
     """
 
-    def __init__(self, raw_hex):
+    def __init__(self, raw_hex, height = None):
         self.hex = raw_hex
         self._hash = None
         self._transactions = None
         self._header = None
         self._n_transactions = None
         self.size = len(raw_hex)
-        self.height = None
+        self.height = height
 
     def __repr__(self):
         return "Block(%s)" % self.hash

blockchain_parser/blockchain.py

@@ -114,4 +114,4 @@ def get_ordered_blocks(self, index, start=0, end=None):
 
         for blkIdx in blockIndexes[start:end]:
             blkFile = os.path.join(self.path, "blk%05d.dat" % blkIdx.nFile)
-            yield Block(get_block(blkFile, blkIdx.dataPos))
+            yield Block(get_block(blkFile, blkIdx.dataPos), blkIdx.height)