add electrum wallet daemon with container entrypoint

electrum-daemon/Dockerfile

@@ -0,0 +1,16 @@
+FROM debian:bookworm-slim
+
+ARG ELECTRUM_VERSION
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+        ca-certificates curl libsecp256k1-1 python3 python3-cryptography \
+    && curl -fsSL "https://download.electrum.org/${ELECTRUM_VERSION}/Electrum-${ELECTRUM_VERSION}.tar.gz" \
+        | tar -xz -C /opt \
+    && chmod +x "/opt/Electrum-${ELECTRUM_VERSION}/run_electrum" \
+    && ln -s "/opt/Electrum-${ELECTRUM_VERSION}/run_electrum" /usr/local/bin/electrum \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY --chmod=755 docker-entrypoint.sh /usr/local/bin/docker-entrypoint.sh
+
+ENTRYPOINT ["docker-entrypoint.sh"]

electrum-daemon/docker-entrypoint.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+NETWORK_FLAG="--${ELECTRUM_NETWORK}"
+WALLET_PATH="/electrum/wallet/${ELECTRUM_WALLET_NAME}"
+DATA_DIR="/electrum/data"
+
+run_electrum() { electrum "${NETWORK_FLAG}" --dir "${DATA_DIR}" "$@"; }
+run_electrum_offline() { electrum --offline "${NETWORK_FLAG}" --dir "${DATA_DIR}" "$@"; }
+
+mkdir -p /electrum/wallet "${DATA_DIR}"
+chmod 700 /electrum/wallet
+
+if [[ ! -f "${WALLET_PATH}" ]]; then
+    echo "Creating ${ELECTRUM_NETWORK} wallet at ${WALLET_PATH}..."
+
+    run_electrum_offline create -w "${WALLET_PATH}" --password "${ELECTRUM_WALLET_PASSWORD}"
+    chmod 600 "${WALLET_PATH}" 2>/dev/null || true
+    
+    echo "Wallet created at ${WALLET_PATH}"
+fi
+
+run_electrum_offline setconfig rpcuser "${ELECTRUM_DAEMON_RPC_USER}"
+run_electrum_offline setconfig rpcpassword "${ELECTRUM_DAEMON_RPC_PASSWORD}"
+run_electrum_offline setconfig rpchost 0.0.0.0
+run_electrum_offline setconfig rpcport "${ELECTRUM_DAEMON_PORT}"
+run_electrum_offline setconfig server "${ELECTRUM_SERVER}"
+
+trap 'run_electrum daemon stop || true; exit 0' SIGTERM SIGINT
+
+run_electrum daemon -d
+run_electrum load_wallet -w "${WALLET_PATH}" --password "${ELECTRUM_WALLET_PASSWORD}"
+
+sleep infinity