Get Decred account key from seed.

basicswap/interface/dcr/dcr.py

@@ -5,6 +5,8 @@
 # Distributed under the MIT software license, see the accompanying
 # file LICENSE or http://www.opensource.org/licenses/mit-license.php.
 
+import logging
+
 from basicswap.chainparams import Coins
 from basicswap.interface.btc import Secp256k1Interface
 from basicswap.util.address import (
@@ -13,8 +15,10 @@ from basicswap.util.address import (
 )
 from basicswap.util.crypto import (
     blake256,
+    hash160,
     ripemd160,
 )
+from basicswap.util.extkey import ExtKeyPair
 from basicswap.interface.dcr.rpc import make_rpc_func
 
 
@@ -45,7 +49,15 @@ class DCRInterface(Secp256k1Interface):
         self._rpc_host = coin_settings.get('rpchost', '127.0.0.1')
         self._rpcport = coin_settings['rpcport']
         self._rpcauth = coin_settings['rpcauth']
+        self._sc = swap_client
+        self._log = self._sc.log if self._sc and self._sc.log else logging
         self.rpc = make_rpc_func(self._rpcport, self._rpcauth, host=self._rpc_host)
+        if 'walletrpcport' in coin_settings:
+            self.rpc_wallet = make_rpc_func(coin_settings['walletrpcport'], self._rpcauth, host=self._rpc_host)
+        else:
+            self.rpc_wallet = None
+
+        self._use_segwit = coin_settings['use_segwit']
 
     def pkh(self, pubkey: bytes) -> bytes:
         return ripemd160(blake256(pubkey))
@@ -69,6 +81,41 @@ class DCRInterface(Secp256k1Interface):
 
     def testDaemonRPC(self, with_wallet=True) -> None:
         if with_wallet:
-            self.rpc_wallet('getwalletinfo')
+            self.rpc_wallet('getinfo')
         else:
             self.rpc('getblockchaininfo')
+
+    def checkWallets(self) -> int:
+        # Only one wallet possible?
+        return 1
+
+    def initialiseWallet(self, key: bytes) -> None:
+        # Load with --create
+        pass
+
+    def getDaemonVersion(self):
+        return self.rpc('getnetworkinfo')['version']
+
+    def getBlockchainInfo(self):
+        return self.rpc('getblockchaininfo')
+
+    def using_segwit(self) -> bool:
+        return self._use_segwit
+
+    def getWalletInfo(self):
+        rv = self.rpc_wallet('getinfo')
+        return rv
+
+    def getSeedHash(self, seed: bytes) -> bytes:
+        # m / purpose' / coin_type' / account' / change / address_index
+        # m/44'/coin_type'/0'/0/0
+
+        ek = ExtKeyPair(self.coin_type())
+        ek.set_seed(seed)
+
+        coin_type = self.chainparams_network()['bip44']
+        ek_purpose = ek.derive(44 | (1 << 31))
+        ek_coin = ek_purpose.derive(coin_type | (1 << 31))
+        ek_account = ek_coin.derive(0 | (1 << 31))
+
+        return hash160(ek_account.encode_p())

basicswap/interface/dcr/rpc.py

@@ -16,7 +16,6 @@ def callrpc(rpc_port, auth, method, params=[], host='127.0.0.1'):
         x.__handler = None
         v = x.json_request(method, params)
         x.close()
-        print('[rm] v', v)
         r = json.loads(v.decode('utf-8'))
     except Exception as ex:
         traceback.print_exc()