Add EIP165 support

tests/test_eip165.py

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+# standard imports
+import unittest
+import os
+import logging
+
+# local imports
+from chainlib.eth.unittest.ethtester import EthTesterCase
+from chainlib.eth.nonce import RPCNonceOracle
+from chainlib.eth.gas import OverrideGasOracle
+from chainlib.connection import RPCConnection
+from chainlib.eth.tx import (
+        TxFactory,
+        receipt,
+        )
+from chainlib.eth.eip165 import EIP165
+
+logging.basicConfig(level=logging.DEBUG)
+logg = logging.getLogger()
+
+script_dir = os.path.realpath(os.path.dirname(__file__))
+
+
+class TestSupports(EthTesterCase):
+
+    def setUp(self):
+        super(TestSupports, self).setUp()
+        #nonce_oracle = TestNonceOracle(self.accounts[0])
+        self.conn = RPCConnection.connect(self.chain_spec, 'default')
+        nonce_oracle = RPCNonceOracle(self.accounts[0], self.conn)
+
+        f = open(os.path.join(script_dir, 'testdata', 'Supports.bin'))
+        code = f.read()
+        f.close()
+
+        txf = TxFactory(self.chain_spec, signer=self.signer, nonce_oracle=nonce_oracle)
+        tx = txf.template(self.accounts[0], None, use_nonce=True)
+        tx = txf.set_code(tx, code)
+        (tx_hash_hex, o) = txf.build(tx)
+
+        r = self.conn.do(o)
+        logg.debug('deployed with hash {}'.format(r))
+
+        o = receipt(tx_hash_hex)
+        r = self.conn.do(o)
+        self.address = r['contract_address']
+
+
+    def test_supports(self):
+        gas_oracle = OverrideGasOracle(limit=100000, conn=self.conn)
+        c = EIP165(self.chain_spec, gas_oracle=gas_oracle)
+        o = c.supports_interface(self.address, '0xdeadbeef', sender_address=self.accounts[0])
+        r = self.conn.do(o)
+        v = c.parse_supports_interface(r)
+        self.assertEqual(v, 1)
+        
+        o = c.supports_interface(self.address, '0xbeeffeed', sender_address=self.accounts[0])
+        r = self.conn.do(o)
+        v = c.parse_supports_interface(r)
+        self.assertEqual(v, 0)
+
+if __name__ == '__main__':
+    unittest.main()

tests/testdata/Supports.bin

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

tests/testdata/Supports.sol

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+pragma solidity ^0.8.0;
+
+contract Supports {
+	function supportsInterface(bytes4 _sum) public pure returns (bool) {
+		if (_sum == 0xdeadbeef) {
+			return true;
+		}
+		return false;
+	}
+}