fix(umbrel): bundle bitcoin-cli and lncli for mode A/B without Lite fallback

PyBLOCK's mode A (Bitcoin + Lightning) and mode B (Bitcoin only) call
bitcoin-cli and lncli directly via subprocess. The Umbrel image did not
ship those binaries, so the startup validation in PyBlock.py:1898-1909
detected the empty CLI paths and silently redirected to Lite Mode against
public APIs — defeating the point of installing PyBLOCK on a node.

Per nmfretz's review on getumbrel/umbrel-apps#5258, this takes the
"bundle the binaries inside the PyBLOCK image" path (option 2):

- dockerfile: download bitcoin-cli (Bitcoin Core 28.1) and lncli (LND
  v0.20.1-beta, matching what Umbrel ships) for both linux/amd64 and
  linux/arm64. Verifies the Bitcoin Core SHA256SUMS. Real binaries land
  at /usr/local/bin/{bitcoin-cli,lncli}.bin.
- umbrel/{bitcoin-cli,lncli}-wrapper.sh: thin shell wrappers installed
  as /usr/local/bin/{bitcoin-cli,lncli} that exec the real binary with
  -rpcconnect/-rpcuser/-rpcpassword (or --rpcserver/--tlscertpath/
  --macaroonpath for lncli) injected from the BITCOIN_RPC_* / LND_*
  env vars Umbrel provides via APP_BITCOIN_* / APP_LIGHTNING_*. They
  fail loud if those env vars are missing.
- entrypoint.sh: default BITCOIN_CLI_PATH/LND_CLI_PATH to the wrapper
  locations when the relevant RPC host env vars are set and the wrapper
  is executable, so bclock.conf / blndconnect.conf get the right
  bitcoincli / ln paths automatically.
- umbrel/: bump image tag and app version to v4.0.2 with release notes.

Local smoke test on amd64:
  bitcoin-cli.bin --version -> Bitcoin Core RPC client version v28.1.0
  lncli.bin --version       -> lncli version 0.20.1-beta
  /usr/local/bin/bitcoin-cli (no env) -> fails with "BITCOIN_RPC_HOST must be set"
  /usr/local/bin/bitcoin-cli (env set) -> dispatches to the real binary

Image grows ~70MB (mostly the Go-built lncli).

Co-Authored-By: kulvex code <noreply@github.com>

dockerfile

@@ -29,6 +29,32 @@ RUN apt-get update \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
 
+# Install bitcoin-cli and lncli so PyBLOCK's mode A/B can talk to Umbrel's
+# Bitcoin Core and LND containers over RPC/gRPC without a degraded Lite Mode
+# fallback. The binaries are wrapped by umbrel/{bitcoin-cli,lncli}-wrapper.sh
+# (installed below) which inject the connection details Umbrel injects via
+# env vars.
+ARG TARGETARCH
+ARG BITCOIN_VERSION=28.1
+ARG LND_VERSION=v0.20.1-beta
+RUN set -eux; \
+    case "${TARGETARCH}" in \
+        amd64) BTC_ARCH=x86_64-linux-gnu; LND_ARCH=amd64 ;; \
+        arm64) BTC_ARCH=aarch64-linux-gnu; LND_ARCH=arm64 ;; \
+        *) echo "Unsupported TARGETARCH: ${TARGETARCH}" >&2; exit 1 ;; \
+    esac; \
+    cd /tmp; \
+    wget -q "https://bitcoincore.org/bin/bitcoin-core-${BITCOIN_VERSION}/bitcoin-${BITCOIN_VERSION}-${BTC_ARCH}.tar.gz"; \
+    wget -q "https://bitcoincore.org/bin/bitcoin-core-${BITCOIN_VERSION}/SHA256SUMS"; \
+    grep "bitcoin-${BITCOIN_VERSION}-${BTC_ARCH}.tar.gz" SHA256SUMS | sha256sum -c -; \
+    tar -xzf "bitcoin-${BITCOIN_VERSION}-${BTC_ARCH}.tar.gz" "bitcoin-${BITCOIN_VERSION}/bin/bitcoin-cli"; \
+    install -m 0755 "bitcoin-${BITCOIN_VERSION}/bin/bitcoin-cli" /usr/local/bin/bitcoin-cli.bin; \
+    rm -rf "bitcoin-${BITCOIN_VERSION}" "bitcoin-${BITCOIN_VERSION}-${BTC_ARCH}.tar.gz" SHA256SUMS; \
+    wget -q "https://github.com/lightningnetwork/lnd/releases/download/${LND_VERSION}/lnd-linux-${LND_ARCH}-${LND_VERSION}.tar.gz"; \
+    tar -xzf "lnd-linux-${LND_ARCH}-${LND_VERSION}.tar.gz" --strip-components=1 "lnd-linux-${LND_ARCH}-${LND_VERSION}/lncli"; \
+    install -m 0755 lncli /usr/local/bin/lncli.bin; \
+    rm -f lncli "lnd-linux-${LND_ARCH}-${LND_VERSION}.tar.gz"
+
 RUN python3 -m venv /app/venv
 ENV PATH="/app/venv/bin:$PATH"
 
@@ -39,6 +65,13 @@ RUN pip install --no-cache-dir --upgrade pip \
 
 COPY . /app/pyblock/
 
+# Install the bitcoin-cli / lncli wrappers as the default CLI paths so any
+# subprocess call to bitcoin-cli / lncli (including PyBLOCK's mode A/B menus)
+# is transparently routed through RPC/gRPC against the Umbrel dependency
+# containers. The real binaries live at /usr/local/bin/{bitcoin-cli,lncli}.bin.
+RUN install -m 0755 /app/pyblock/umbrel/bitcoin-cli-wrapper.sh /usr/local/bin/bitcoin-cli \
+    && install -m 0755 /app/pyblock/umbrel/lncli-wrapper.sh /usr/local/bin/lncli
+
 # Entrypoint for auto-configuration
 COPY entrypoint.sh /app/entrypoint.sh
 RUN chmod +x /app/entrypoint.sh

entrypoint.sh

@@ -16,6 +16,17 @@ if ! touch "$CONFIG_DIR/.writetest" 2>/dev/null; then
 fi
 rm -f "$CONFIG_DIR/.writetest"
 
+# Default to the bundled bitcoin-cli / lncli wrappers when the caller hasn't
+# overridden them. The wrappers route every CLI invocation through RPC/gRPC
+# against the Umbrel Bitcoin Core and LND containers, so PyBLOCK's mode A/B
+# work without a real local node binary on disk.
+if [ -n "$BITCOIN_RPC_HOST" ] && [ -x /usr/local/bin/bitcoin-cli ]; then
+    export BITCOIN_CLI_PATH="${BITCOIN_CLI_PATH:-/usr/local/bin/bitcoin-cli}"
+fi
+if [ -n "$LND_HOST" ] && [ -x /usr/local/bin/lncli ]; then
+    export LND_CLI_PATH="${LND_CLI_PATH:-/usr/local/bin/lncli}"
+fi
+
 # Auto-generate Bitcoin config from env vars if set
 if [ -n "$BITCOIN_RPC_HOST" ] && [ -n "$BITCOIN_RPC_USER" ]; then
     BITCOIN_RPC_PORT="${BITCOIN_RPC_PORT:-8332}"

umbrel/bitcoin-cli-wrapper.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+# bitcoin-cli wrapper for Umbrel/Docker deployments.
+#
+# PyBLOCK's modes A/B call bitcoin-cli directly via subprocess. Inside the
+# Umbrel container we connect to the host's Bitcoin Core (or Knots) over the
+# Docker network using the credentials Umbrel injects through APP_BITCOIN_*
+# env vars (re-exported by the entrypoint as BITCOIN_RPC_*). This wrapper
+# turns every `bitcoin-cli` call into a properly-authenticated remote RPC
+# call against that node.
+set -e
+
+: "${BITCOIN_RPC_HOST:?BITCOIN_RPC_HOST must be set}"
+: "${BITCOIN_RPC_USER:?BITCOIN_RPC_USER must be set}"
+: "${BITCOIN_RPC_PASS:?BITCOIN_RPC_PASS must be set}"
+
+exec /usr/local/bin/bitcoin-cli.bin \
+    -rpcconnect="${BITCOIN_RPC_HOST}" \
+    -rpcport="${BITCOIN_RPC_PORT:-8332}" \
+    -rpcuser="${BITCOIN_RPC_USER}" \
+    -rpcpassword="${BITCOIN_RPC_PASS}" \
+    "$@"

umbrel/docker-compose.yml

@@ -7,7 +7,7 @@ services:
       APP_PORT: 6969
 
   web:
-    image: curly60e/pyblock:v4.0.1
+    image: curly60e/pyblock:v4.0.2
     restart: on-failure
     stop_grace_period: 1m
     user: "1000:1000"

umbrel/lncli-wrapper.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+# lncli wrapper for Umbrel/Docker deployments.
+#
+# Mirrors umbrel/bitcoin-cli-wrapper.sh: PyBLOCK shells out to lncli for
+# Lightning operations, so we turn every `lncli` call into one against the
+# Umbrel LND container using the gRPC endpoint, TLS cert, and macaroon
+# Umbrel injects through APP_LIGHTNING_* env vars (re-exported by the
+# entrypoint as LND_*).
+set -e
+
+: "${LND_HOST:?LND_HOST must be set}"
+: "${LND_TLS_CERT_PATH:?LND_TLS_CERT_PATH must be set}"
+: "${LND_MACAROON_PATH:?LND_MACAROON_PATH must be set}"
+
+exec /usr/local/bin/lncli.bin \
+    --rpcserver="${LND_HOST}:${LND_GRPC_PORT:-10009}" \
+    --tlscertpath="${LND_TLS_CERT_PATH}" \
+    --macaroonpath="${LND_MACAROON_PATH}" \
+    "$@"

umbrel/umbrel-app.yml

@@ -2,7 +2,7 @@ manifestVersion: 1
 id: pyblock
 category: bitcoin
 name: PyBLOCK
-version: "4.0.1"
+version: "4.0.2"
 tagline: Terminal-based Bitcoin & Lightning node dashboard
 description: >-
   PyBLOCK is a cyberpunk-aesthetic Bitcoin dashboard that runs in your
@@ -40,9 +40,10 @@ defaultUsername: ""
 defaultPassword: ""
 deterministicPassword: false
 releaseNotes: >-
-  v4.0.1: Fix permission errors on Umbrel by pinning the container user
-  to UID/GID 1000, matching the user enforced by docker-compose. Adds a
-  startup writability check that fails fast with a clear message when
-  the bind-mounted config directory is not writable.
+  v4.0.2: Bundle bitcoin-cli and lncli inside the image, wrapped to inject
+  the RPC/gRPC connection details Umbrel provides via APP_BITCOIN_* and
+  APP_LIGHTNING_* env vars. Modes A (Bitcoin + Lightning) and B (Bitcoin
+  only) now connect to the Umbrel dependency containers directly instead
+  of falling back to Lite Mode at startup.
 submitter: curly60e
 submission: ""