Add eip173/owned interface, test contract, test stub

chainlib/eth/owned.py

@@ -0,0 +1,67 @@
+# external imports
+from hexathon import (
+        add_0x,
+    )
+
+# local imports
+from .contract import (
+        ABIContractEncoder,
+        ABIContractDecoder,
+        ABIContractType,
+    )
+from chainlib.jsonrpc import jsonrpc_template
+
+class EIP173(TxFactory):
+
+    def transfer_ownership(self, contract_address, sender_address, new_owner_address):
+        enc = ABIContractEncoder()
+        enc.method('transferOwnership')
+        enc.typ(ABIContractType.ADDRESS)
+        enc.address(new_owner_address)
+        data = add_0x(enc.get())
+        tx = self.template(sender_address, contract_address, use_nonce=True)
+        tx = self.set_code(tx, data)
+        tx = self.finalize(tx, tx_format)
+        return tx
+
+
+    def owner(self, contract_address, sender_address=ZERO_ADDRESS):
+        o = jsonrpc_template()
+        o['method'] = 'eth_call'
+        enc = ABIContractEncoder()
+        enc.method('owner')
+        data = add_0x(enc.get())
+        tx = self.template(sender_address, contract_address)
+        tx = self.set_code(tx, data)
+        o['params'].append(self.normalize(tx))
+        o['params'].append('latest')
+        return o
+
+
+    @classmethod
+    def parse_owner(self, v):
+        return abi_decode_single(ABIContractType.ADDRESS, v)
+
+
+class Owned(EIP173):
+
+    def accept_ownership(self, contract_address, sender_address):
+        enc = ABIContractEncoder()
+        enc.method('acceptOwnership')
+        data = add_0x(enc.get())
+        tx = self.template(sender_address, contract_address, use_nonce=True)
+        tx = self.set_code(tx, data)
+        tx = self.finalize(tx, tx_format)
+        return tx
+
+
+    def take_ownership(self, contract_address, sender_address, resource_address):
+        enc = ABIContractEncoder()
+        enc.method('takeOwnership')
+        enc.typ(ABIContractType.ADDRESS)
+        enc.address(resource_address)
+        data = add_0x(enc.get())
+        tx = self.template(sender_address, contract_address, use_nonce=True)
+        tx = self.set_code(tx, data)
+        tx = self.finalize(tx, tx_format)
+        return tx