update validate_tx script
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@ -2,23 +2,20 @@
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import sys, hashlib
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from electrum import Interface
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from electrum.bitcoin import Hash, rev_hex, int_to_hex
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from electrum.bitcoin import Hash, rev_hex, int_to_hex, hash_encode, hash_decode
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"""validate a transaction (SPV)"""
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i = Interface({'server':'ecdsa.org:50002:s'})
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i.start()
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encode = lambda x: x[::-1].encode('hex')
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decode = lambda x: x.decode('hex')[::-1]
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def do_merkle_root(merkle_s, target_hash):
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h = decode(target_hash)
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for item in merkle_s:
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is_left = item[0] == 'L'
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h = Hash( h + decode(item[1:]) ) if is_left else Hash( decode(item[1:]) + h )
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return encode(h)
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def hash_merkle_root(merkle_s, target_hash, pos):
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h = hash_decode(target_hash)
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for i in range(len(merkle_s)):
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item = merkle_s[i]
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h = Hash( hash_decode(item) + h ) if ((pos >> i) & 1) else Hash( h + hash_decode(item) )
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return hash_encode(h)
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def hash_header(res):
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@ -33,7 +30,7 @@ def hash_header(res):
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def verify_tx(tx_hash):
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res = i.synchronous_get([ ('blockchain.transaction.get_merkle',[tx_hash]) ])[0]
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merkle_root = do_merkle_root(res['merkle'], tx_hash)
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merkle_root = hash_merkle_root(res['merkle'], tx_hash, res['pos'])
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tx_height = res.get('block_height')
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headers_requests = []
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for height in range(tx_height-10,tx_height+10):
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