P2P Trading: DEG Plugins (Ledger Recorder)

build/Dockerfile.onix-adapter-deg

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+# Dockerfile for building onix-adapter with DEG plugins
+# This ensures the adapter and plugins are built with the same Go version
+# and beckn-onix package versions for compatibility.
+#
+# Build from DEG repo root:
+#   docker build -f build/Dockerfile.onix-adapter-deg -t onix-adapter-deg \
+#     --build-context beckn-onix=../beckn-onix .
+#
+# Or from parent directory containing both repos:
+#   docker build -f DEG/build/Dockerfile.onix-adapter-deg -t onix-adapter-deg \
+#     --build-context beckn-onix=beckn-onix DEG
+
+FROM golang:1.24-bullseye AS builder
+
+WORKDIR /workspace
+
+# Copy beckn-onix source
+COPY --from=beckn-onix . ./beckn-onix/
+
+# Copy DEG plugins source
+COPY plugins ./deg-plugins/
+
+# Fix replace directive to use Docker build path
+WORKDIR /workspace/deg-plugins
+RUN sed -i 's|=> ../../beckn-onix|=> /workspace/beckn-onix|g' go.mod
+
+# Create Go workspace so the server and plugins resolve ALL shared dependencies
+# to identical versions. Required for Go plugin (.so) ABI compatibility.
+WORKDIR /workspace
+RUN go work init ./beckn-onix ./deg-plugins
+RUN go work sync
+
+# Build onix-adapter server
+WORKDIR /workspace/beckn-onix
+RUN go mod download
+RUN go build -o server cmd/adapter/main.go
+
+# Build standard beckn-onix plugins
+RUN mkdir -p plugins
+RUN ./install/build-plugins.sh
+
+# Build DEG plugins
+WORKDIR /workspace/deg-plugins
+
+# Build DEG ledger recorder plugin
+RUN go build -buildmode=plugin -o /workspace/beckn-onix/plugins/degledgerrecorder.so ./degledgerrecorder/cmd/plugin.go
+
+# # Build policy enforcer plugin
+# RUN go build -buildmode=plugin -o /workspace/beckn-onix/plugins/policyenforcer.so ./policyenforcer/cmd/plugin.go
+
+# Create minimal runtime image
+# Using debian-slim (glibc) for Go plugin (.so) compatibility with the bullseye builder.
+# Wolfi-base (cgr.dev) can be used if its registry is reachable in your environment.
+FROM debian:bookworm-slim
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates && rm -rf /var/lib/apt/lists/*
+WORKDIR /app
+
+# Copy binary and all plugins (standard + DEG)
+COPY --from=builder /workspace/beckn-onix/server .
+COPY --from=builder /workspace/beckn-onix/plugins ./plugins
+
+EXPOSE 8081
+
+CMD ["sh", "-c", "./server --config=${CONFIG_FILE}"]

build/README.md

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+# DEG Build Scripts
+
+This directory contains build scripts and Docker configurations for the DEG Ledger Recorder plugin and onix-adapter-deg image.
+
+## Files
+
+| File | Description |
+|------|-------------|
+| `Dockerfile.onix-adapter-deg` | Dockerfile for building onix-adapter with DEG plugins |
+| `build-multiarch.sh` | Build multi-arch Docker image (amd64 + arm64) |
+
+## Multi-Architecture Builds
+
+The `build-multiarch.sh` script builds Docker images for multiple architectures (linux/amd64 and linux/arm64) using Docker Buildx and QEMU emulation.
+
+### Prerequisites
+
+1. **Docker with Buildx support**
+   - Docker Desktop (macOS/Windows): Buildx is included
+   - Linux: Install Docker Engine 19.03+ with buildx plugin
+
+2. **QEMU** (for cross-architecture emulation)
+   - The script automatically installs QEMU user-mode emulation
+   - Or install manually:
+     ```bash
+     docker run --privileged --rm tonistiigi/binfmt --install all
+     ```
+
+3. **beckn-onix repository**
+   - Script will prompt for path if not found at default location (`../beckn-onix`)
+   - Or set `BECKN_ONIX_ROOT` environment variable to skip prompt
+
+### Usage
+
+```bash
+# Build and load to local Docker (current architecture only)
+./build/build-multiarch.sh --load
+
+# Build for specific platform
+./build/build-multiarch.sh --platform amd64 --load
+./build/build-multiarch.sh --platform arm64 --load
+
+# Build and push to registry (multi-arch)
+./build/build-multiarch.sh --push --registry docker.io/myuser
+
+# Build with custom tag
+./build/build-multiarch.sh --push --registry ghcr.io/myorg --tag v1.0.0
+
+# Show help
+./build/build-multiarch.sh --help
+```
+
+### Environment Variables
+
+| Variable | Default | Description |
+|----------|---------|-------------|
+| `BECKN_ONIX_ROOT` | (prompts if not found) | Path to beckn-onix repo |
+| `IMAGE_NAME` | `onix-adapter-deg` | Docker image name |
+| `IMAGE_TAG` | `p2p-multiarch-v3` | Docker image tag |
+| `REGISTRY` | (none) | Registry prefix (e.g., `docker.io/user`) |
+| `PLATFORMS` | `linux/amd64,linux/arm64` | Target platforms |
+| `BUILDER_NAME` | `deg-multiarch` | Buildx builder name |
+
+### Examples
+
+**Local development (macOS Apple Silicon)**
+```bash
+# Build for your Mac's ARM64 architecture
+./build/build-multiarch.sh --platform arm64 --load
+
+# Run locally
+docker run -it --rm \
+  -v $(pwd)/config:/app/config \
+  -e CONFIG_FILE=/app/config/local.yaml \
+  -p 8081:8081 \
+  onix-adapter-deg:latest
+```
+
+**Build for production deployment**
+```bash
+# Build multi-arch and push to Docker Hub
+export REGISTRY=docker.io/mycompany
+export IMAGE_TAG=v1.2.3
+./build/build-multiarch.sh --push
+
+# Verify multi-arch manifest
+docker buildx imagetools inspect docker.io/mycompany/onix-adapter-deg:v1.2.3
+```
+
+**GitHub Actions CI/CD**
+
+See `.github/workflows/build-multiarch.yml` for automated multi-arch builds.
+
+## Go Plugin Compatibility
+
+**Important:** Go plugins require exact version matching:
+- The plugin and host binary must be built with the **same Go version**
+- The plugin and host must use the **same dependency versions**
+- CGO must be enabled (`CGO_ENABLED=1`)
+
+The Dockerfile ensures compatibility by building both the adapter and plugins in the same build stage with the same Go version.
+
+## Troubleshooting
+
+### "exec format error"
+You're trying to run an image built for a different architecture. Either:
+- Build for your architecture: `--platform amd64` or `--platform arm64`
+- Enable QEMU: `docker run --privileged --rm tonistiigi/binfmt --install all`
+
+### "plugin was built with a different version of package"
+The plugin was built with a different Go version or dependency versions than the adapter. Rebuild both together using the Dockerfile.
+
+### "builder not found"
+Create the buildx builder manually:
+```bash
+docker buildx create --name deg-multiarch --driver docker-container --bootstrap
+docker buildx use deg-multiarch
+```
+
+### Slow builds on non-native architecture
+QEMU emulation is slower than native builds. For faster CI:
+- Use native runners when available (e.g., GitHub's `ubuntu-latest` for amd64)
+- Consider using arm64 runners for arm64 builds
+- Use build caching (`--cache-from type=gha`)
+
+## Architecture Notes
+
+The image supports:
+- **linux/amd64**: Standard x86-64 servers (AWS EC2, GCP, most cloud VMs)
+- **linux/arm64**: ARM64 servers (AWS Graviton, Apple Silicon Macs, Raspberry Pi 4+)
+
+The base image (`cgr.dev/chainguard/wolfi-base`) and Go image (`golang:1.24-bullseye`) both provide multi-arch support.