Add transaction executor helper

crypto_dev_signer/keystore/dict.py

@@ -0,0 +1,33 @@
+# standard imports
+import logging
+
+# local imports
+from . import keyapi
+from .interface import Keystore
+from crypto_dev_signer.error import UnknownAccountError
+from crypto_dev_signer.common import strip_hex_prefix
+
+logg = logging.getLogger()
+
+
+class DictKeystore(Keystore):
+
+    def __init__(self):
+        self.keys = {}
+
+
+    def get(self, address, password=None):
+        if password != None:
+            logg.debug('password ignored as dictkeystore doesnt do encryption')
+        try:
+            return self.keys[address]
+        except KeyError:
+            raise UnknownAccountError(address)
+
+
+    def import_key(self, pk, password=None):
+        pubk = keyapi.private_key_to_public_key(pk)
+        address_hex = pubk.to_checksum_address()
+        address_hex_clean = strip_hex_prefix(address_hex)
+        self.keys[address_hex_clean] = pk.to_bytes()
+        return address_hex