Update transferapproval interface

util/calculate_erc165.py

@@ -0,0 +1,17 @@
+import sys
+import web3
+
+f = open(sys.argv[1], 'r')
+z = b''
+for i in range(32):
+    z += b'\x00'
+while True:
+    l = f.readline()
+    if l == '':
+        break
+    #print('line {}'.format(l))
+    h = web3.Web3.keccak(text=l)
+    z = bytes([a ^ b for a, b in zip(h, z)])
+    #print(h.hex(), z.hex())
+f.close()
+print(h[:4].hex())