diff --git a/trezorlib/tx_api.py b/trezorlib/tx_api.py
index 55d39c189..6d07fd90e 100644
--- a/trezorlib/tx_api.py
+++ b/trezorlib/tx_api.py
@@ -5,44 +5,6 @@ from decimal import Decimal
 from filecache import filecache, DAY
 import types_pb2 as proto_types
 
-def op_push_data(data):
-    l = len(data)
-    if l < 0x4C:
-        return chr(l) + data
-    elif i < 0xFF:
-        return '\x4C' + chr(l) + data
-    elif i < 0xFFFF:
-        return '\x4D' + struct.pack("<H", i) + data
-    else:
-        return '\x4E' + struct.pack("<I", i) + data
-
-def opcode_serialize(opcode):
-    mapping = {
-        'OP_TRUE'                : '\x51',
-        'OP_RETURN'              : '\x6A',
-        'OP_DUP'                 : '\x76',
-        'OP_EQUAL'               : '\x87',
-        'OP_EQUALVERIFY'         : '\x88',
-        'OP_RIPEMD160'           : '\xA6',
-        'OP_SHA1'                : '\xA7',
-        'OP_SHA256'              : '\xA8',
-        'OP_HASH160'             : '\xA9',
-        'OP_HASH256'             : '\xAA',
-        'OP_CHECKSIG'            : '\xAC',
-        'OP_CHECKSIGVERIFY'      : '\xAD',
-        'OP_CHECKMULTISIG'       : '\xAE',
-        'OP_CHECKMULTISIGVERIFY' : '\xAF',
-    }
-    # check if it is known opcode
-    if mapping.has_key(opcode):
-        return mapping[opcode]
-    # it's probably hex data
-    try:
-        x = binascii.unhexlify(opcode)
-        return op_push_data(x)
-    except:
-        raise Exception('Unknown script opcode: %s' % opcode)
-
 def insight_tx(url, rawdata=False):
     if not rawdata:
         try:
@@ -68,17 +30,13 @@ def insight_tx(url, rawdata=False):
         else:
             i.prev_hash = binascii.unhexlify(vin['txid'])
             i.prev_index = vin['vout']
-            asm = vin['scriptSig']['asm'].split(' ')
-            asm = [ opcode_serialize(x) for x in asm ]
-            i.script_sig = ''.join(asm)
+            i.script_sig = binascii.unhexlify(vin['scriptSig']['hex'])
             i.sequence = vin['sequence']
 
     for vout in data['vout']:
         o = t.bin_outputs.add()
         o.amount = int(Decimal(str(vout['value'])) * 100000000)
-        asm = vout['scriptPubKey']['asm'].split(' ')
-        asm = [ opcode_serialize(x) for x in asm ]
-        o.script_pubkey = ''.join(asm)
+        o.script_pubkey = binascii.unhexlify(vout['scriptPubKey']['hex'])
 
     return t