PoC: Use event stream

.env.example

@@ -0,0 +1,2 @@
+JSON_RPC_URL=<your-json-rpc-url># e.g. https://lb.drpc.org/ogrpc?network=ethereum&dkey=your-magic-key
+NATS_STREAM_NAME=ethereum_events

.gitignore

@@ -7,3 +7,4 @@ forta.config.json
 version.json
 .DS_Store
 .idea
+.env

README.md

@@ -129,3 +129,14 @@ And finally:
 yarn install
 yarn format
 ```
+
+
+## Consuming events from DRPC
+### Prerequesites:
+- [Docker](https://docs.docker.com/get-docker/)
+- [Docker Compose](https://docs.docker.com/compose/install/)
+
+### Steps:
+1. Rename `.env.example` to `.env` and fill in the required values (DRPC API key).
+2. Run `docker-compose up --build`.
+3. The bot will start consuming events from DRPC and logging them to the console.

compose.yaml

@@ -0,0 +1,54 @@
+volumes:
+  nats:
+  last_data:
+
+services:
+  big-ear:
+    image: feofanov/big-ear
+    env_file:
+      - .env
+    environment:
+#        - BLOCK=19788401 # uncomment to run only for a specific block (catches Easy Track event)
+#        - BLOCK=19718592 # uncomment to run only for a specific block (catches Aragon voting event)
+        - NATS_URL=nats://nats:4222
+        - LAST_DATA_DIR=/home/appuser/lastdata
+    depends_on:
+      - nats
+    volumes:
+      - last_data:/home/appuser/last_data
+  nats:
+    image: nats
+    ports:
+      - "4222:4222"
+      - "8222:8222"
+    volumes:
+      - nats:/data
+    command:
+      - "--name=nats"
+      - "--http_port=8222"
+      - "--js"
+      - "--sd=/data"
+
+# bots section
+  ethereum-governance-v2:
+    env_file:
+      - .env
+    build:
+        context: ethereum-governance-v2
+        dockerfile: nats.Dockerfile
+    environment:
+        - BOT_NAME=ethereum-governance-v2 # REQUIRED! SHOULD BE UNIQUE!
+        - NATS_URL=nats://nats:4222
+    depends_on:
+      - big-ear
+  voting-watcher:
+    env_file:
+      - .env
+    build:
+        context: voting-watcher
+        dockerfile: nats.Dockerfile
+    environment:
+        - BOT_NAME=voting-watcher # REQUIRED! SHOULD BE UNIQUE!
+        - NATS_URL=nats://nats:4222
+    depends_on:
+      - big-ear

ethereum-governance-v2/.dockerignore

@@ -1,3 +1,2 @@
 node_modules/
 dist/
-forta.config.json

ethereum-governance-v2/nats.Dockerfile

@@ -0,0 +1,74 @@
+# syntax=docker/dockerfile:1
+
+# Comments are provided throughout this file to help you get started.
+# If you need more help, visit the nats.Dockerfile reference guide at
+# https://docs.docker.com/go/dockerfile-reference/
+
+# Want to help us make this template better? Share your feedback here: https://forms.gle/ybq9Krt8jtBL3iCk7
+
+ARG NODE_VERSION=20.10.0
+
+################################################################################
+# Use node image for base image for all stages.
+FROM node:${NODE_VERSION}-alpine as base
+
+# Set working directory for all build stages.
+WORKDIR /usr/src/app
+
+
+################################################################################
+# Create a stage for installing production dependecies.
+FROM base as deps
+
+RUN apk update && apk add --no-cache make protobuf-dev
+
+# Download dependencies as a separate step to take advantage of Docker's caching.
+# Leverage a cache mount to /root/.yarn to speed up subsequent builds.
+# Leverage bind mounts to package.json and yarn.lock to avoid having to copy them
+# into this layer.
+RUN --mount=type=bind,source=package.json,target=package.json \
+    --mount=type=bind,source=yarn.lock,target=yarn.lock \
+    --mount=type=cache,target=/root/.yarn \
+    yarn install --production --frozen-lockfile --ignore-scripts
+
+################################################################################
+# Create a stage for building the application.
+FROM deps as build
+
+# Download additional development dependencies before building, as some projects require
+# "devDependencies" to be installed to build. If you don't need this, remove this step.
+RUN --mount=type=bind,source=package.json,target=package.json \
+    --mount=type=bind,source=yarn.lock,target=yarn.lock \
+    --mount=type=cache,target=/root/.yarn \
+    yarn install --frozen-lockfile  --ignore-scripts
+
+# Copy the rest of the source files into the image.
+COPY . .
+
+# Run postinstall script if it exists.
+RUN yarn run postinstall
+
+# Run the build script.
+RUN yarn run build
+
+################################################################################
+# Create a new stage to run the application with minimal runtime dependencies
+# where the necessary files are copied from the build stage.
+FROM base as final
+
+# Use production node environment by default.
+ENV NODE_ENV production
+
+# Run the application as a non-root user.
+USER node
+
+# Copy package.json so that package manager commands can be used.
+COPY package.json .
+
+# Copy the production dependencies from the deps stage and also
+# the built application from the build stage into the image.
+COPY --from=deps /usr/src/app/node_modules ./node_modules
+COPY --from=build /usr/src/app/dist ./dist
+
+# Run the application.
+CMD node dist/main.js