Support BIP39 seeds

Dockerfile

@@ -17,5 +17,5 @@ RUN ln -s $ELECTRUM_INSTALL_DIR/run_electrum /usr/local/bin/electrum
 
 WORKDIR /root
 
-COPY entrypoint /usr/local/bin/
+COPY entrypoint bip39toxprv /usr/local/bin/
 ENTRYPOINT ["entrypoint"]

bip39toxprv

@@ -0,0 +1,12 @@
+#!/usr/bin/env python3
+
+from electrum import keystore
+import sys
+
+mnemonic = ' '.join(sys.argv[1: ])
+
+if not keystore.bip39_is_checksum_valid(mnemonic)[0]:
+    sys.exit(1)
+
+k = keystore.from_bip39_seed(mnemonic, "", "m/84'/0'/0'")
+print(k.xprv)

entrypoint

@@ -2,5 +2,11 @@
 
 seed=$1
 
-electrum restore "$seed"
+echo "Importing seed or key..."
+if ! electrum restore "$seed" > /dev/null 2>&1 ]]; then
+	if ! electrum restore "$(bip39toxprv $seed)" > /dev/null 2>&1; then
+		>&2 echo "Error: Seed or key not recognised."
+		exit 1
+	fi
+fi
 electrum --gui text