btclnd.Dockerfile

#
# Dockerfile for bitcart-btclnd daemon
#
# The LND binary itself is fetched at runtime by the daemon
# (see daemons/lnd_process.py:LNDBinaryManager) and cached on the
# data volume, so it is intentionally NOT baked into the image.
#

FROM python:3.12-alpine AS base
COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /bin/

ENV ELECTRUM_USER=electrum
ENV ELECTRUM_HOME=/home/$ELECTRUM_USER
ENV ELECTRUM_DIRECTORY=${ELECTRUM_HOME}/.bitcart-btclnd
ENV IN_DOCKER=1
ENV UV_COMPILE_BYTECODE=1
ENV UV_NO_CACHE=1
ENV UV_NO_SYNC=1
ENV BTCLND_HOST=0.0.0.0
LABEL org.bitcart.image=btclnd-daemon

FROM base AS compile-image

COPY bitcart $ELECTRUM_HOME/site

RUN apk add git python3-dev build-base libffi-dev && \
    cd $ELECTRUM_HOME/site && \
    uv sync --frozen --no-dev --group btclnd --group otel && \
    uv run opentelemetry-bootstrap -a requirements | uv pip install --requirement -

FROM base AS build-image

RUN adduser -D $ELECTRUM_USER && \
    mkdir -p /data/ && \
    ln -sf /data/ $ELECTRUM_DIRECTORY && \
    chown ${ELECTRUM_USER} $ELECTRUM_DIRECTORY && \
    mkdir -p $ELECTRUM_HOME/site && \
    chown ${ELECTRUM_USER} $ELECTRUM_HOME/site && \
    apk add --no-cache libsecp256k1-dev git tor curl && \
    apk add --no-cache --repository=https://dl-cdn.alpinelinux.org/alpine/edge/main jemalloc

COPY --from=compile-image --chown=electrum $ELECTRUM_HOME/site/.venv $ELECTRUM_HOME/.venv
COPY --from=compile-image --chown=electrum $ELECTRUM_HOME/site $ELECTRUM_HOME/site

ENV PYTHONUNBUFFERED=1 PYTHONMALLOC=malloc LD_PRELOAD=libjemalloc.so.2 MALLOC_CONF=background_thread:true,max_background_threads:1,metadata_thp:auto,dirty_decay_ms:80000,muzzy_decay_ms:80000
ENV PATH="$ELECTRUM_HOME/.venv/bin:$PATH"
USER $ELECTRUM_USER
WORKDIR $ELECTRUM_HOME/site

CMD ["just","daemon", "btclnd"]