app/data/container-image-list.txt

@@ -13,6 +13,7 @@ cerc/laconic-cns-cli
 cerc/fixturenet-eth-geth
 cerc/fixturenet-eth-lighthouse
 cerc/watcher-mobymask
+cerc/watcher-erc20
 cerc/test-container
 cerc/eth-probe
 cerc/builder-js

app/data/pod-list.txt

@@ -11,6 +11,7 @@ laconicd
 fixturenet-laconicd
 fixturenet-eth
 watcher-mobymask
+watcher-erc20
 test
 eth-probe
 keycloak

compose/docker-compose-ipld-eth-server.yml

@@ -30,4 +30,9 @@ services:
     ports:
       - "127.0.0.1:8081:8081"
       - "127.0.0.1:8082:8082"
-
+    healthcheck:
+      test: ["CMD", "nc", "-v", "localhost", "8081"]
+      interval: 20s
+      timeout: 5s
+      retries: 15
+      start_period: 5s

compose/docker-compose-watcher-erc20.yml

@@ -0,0 +1,49 @@
+version: '3.2'
+
+services:
+
+  watcher-db:
+    restart: unless-stopped
+    image: postgres:14-alpine
+    environment:
+      - POSTGRES_USER=vdbm
+      - POSTGRES_MULTIPLE_DATABASES=erc20-watcher,erc20-watcher-job-queue
+      - POSTGRES_EXTENSION=erc20-watcher-job-queue:pgcrypto
+      - POSTGRES_PASSWORD=password
+    volumes:
+      - ../config/postgresql/multiple-postgressql-databases.sh:/docker-entrypoint-initdb.d/multiple-postgressql-databases.sh
+      - watcher_db_data:/var/lib/postgresql/data
+    ports:
+      - "0.0.0.0:15432:5432"
+    healthcheck:
+      test: ["CMD", "nc", "-v", "localhost", "5432"]
+      interval: 20s
+      timeout: 5s
+      retries: 15
+      start_period: 10s
+
+  erc20-watcher:
+    restart: unless-stopped
+    depends_on:
+      ipld-eth-server:
+        condition: service_healthy
+      watcher-db:
+        condition: service_healthy
+    image: cerc/watcher-erc20:local
+    environment:
+      - ETH_RPC_URL=http://go-ethereum:8545
+    command: ["sh", "-c", "yarn server"]
+    volumes:
+      - ../config/watcher-erc20/erc20-watcher.toml:/app/packages/erc20-watcher/environments/local.toml
+    ports:
+      - "0.0.0.0:3001:3001"
+      - "0.0.0.0:9001:9001"
+    healthcheck:
+      test: ["CMD", "nc", "-v", "localhost", "3001"]
+      interval: 20s
+      timeout: 5s
+      retries: 15
+      start_period: 5s
+
+volumes:
+  watcher_db_data:

config/watcher-erc20/erc20-watcher.toml

@@ -0,0 +1,41 @@
+[server]
+  host = "0.0.0.0"
+  port = 3001
+  mode = "storage"
+  kind = "lazy"
+
+[metrics]
+  host = "127.0.0.1"
+  port = 9000
+  [metrics.gql]
+    port = 9001
+
+[database]
+  type = "postgres"
+  host = "watcher-db"
+  port = 5432
+  database = "erc20-watcher"
+  username = "vdbm"
+  password = "password"
+  synchronize = true
+  logging = false
+  maxQueryExecutionTime = 100
+
+[upstream]
+  [upstream.ethServer]
+    gqlApiEndpoint = "http://ipld-eth-server:8082/graphql"
+    rpcProviderEndpoint = "http://ipld-eth-server:8081"
+
+  [upstream.cache]
+    name = "requests"
+    enabled = false
+    deleteOnStart = false
+
+[jobQueue]
+  dbConnectionString = "postgres://vdbm:password@watcher-db:5432/erc20-watcher-job-queue"
+  maxCompletionLagInSecs = 300
+  jobDelayInMilliSecs = 100
+  eventsInBatch = 50
+  blockDelayInMilliSecs = 2000
+  prefetchBlocksInMem = true
+  prefetchBlockCount = 10

config/watcher-mobymask/mobymask-watcher.toml

@@ -37,8 +37,8 @@
 
 [upstream]
   [upstream.ethServer]
-    gqlApiEndpoint = "http://ipld-eth-server:8083/graphql"
-    rpcProviderEndpoint = "http://ipld-eth-server:8082"
+    gqlApiEndpoint = "http://ipld-eth-server:8082/graphql"
+    rpcProviderEndpoint = "http://ipld-eth-server:8081"
     blockDelayInMilliSecs = 60000
 
   [upstream.cache]

container-build/cerc-go-ethereum-foundry/genesis-automine.json

@@ -10,7 +10,7 @@
     "petersburgBlock": 0,
     "istanbulBlock": 0,
     "clique": {
-      "period": 2,
+      "period": 5,
       "epoch": 3000
     }
   },

container-build/cerc-watcher-erc20/Dockerfile

@@ -0,0 +1,13 @@
+FROM node:16.17.1-alpine3.16
+
+RUN apk --update --no-cache add git python3 alpine-sdk
+
+WORKDIR /app
+
+COPY . .
+
+RUN echo "Building watcher-ts" && \
+    git checkout v0.2.19 && \
+    yarn && yarn build
+
+WORKDIR /app/packages/erc20-watcher

container-build/cerc-watcher-erc20/build.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+# Build cerc/watcher-erc20
+
+# See: https://stackoverflow.com/a/246128/1701505
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+
+docker build -t cerc/watcher-erc20:local -f ${SCRIPT_DIR}/Dockerfile ${CERC_REPO_BASE_DIR}/watcher-ts

stacks/erc20/README.md

@@ -0,0 +1,157 @@
+# ERC20 Watcher
+
+Instructions to deploy a local ERC20 watcher stack (core + watcher) for demonstration and testing purposes using [laconic-stack-orchestrator](../../README.md#setup)
+
+## Setup
+
+* Clone / pull required repositories:
+
+  ```bash
+  $ laconic-so setup-repositories --include cerc-io/go-ethereum,cerc-io/ipld-eth-db,cerc-io/ipld-eth-server,cerc-io/watcher-ts --pull
+  ```
+
+* Build the core and watcher container images:
+
+  ```bash
+  $ laconic-so build-containers --include cerc/go-ethereum,cerc/go-ethereum-foundry,cerc/ipld-eth-db,cerc/ipld-eth-server,cerc/watcher-erc20
+  ```
+
+  This should create the required docker images in the local image registry.
+
+* Deploy the stack:
+
+  ```bash
+  $ laconic-so deploy-system --include db,go-ethereum-foundry,ipld-eth-server,watcher-erc20 up
+  ```
+
+## Demo
+
+* Find the watcher container's id using `docker ps` and export it for later use:
+
+  ```bash
+  $ export CONTAINER_ID=<CONTAINER_ID>
+  ```
+
+* Deploy an ERC20 token:
+
+  ```bash
+  $ docker exec $CONTAINER_ID yarn token:deploy:docker
+  ```
+
+  Export the address of the deployed token to a shell variable for later use:
+
+  ```bash
+  $ export TOKEN_ADDRESS=<TOKEN_ADDRESS>
+  ```
+
+* Open `http://localhost:3001/graphql` (GraphQL Playground) in a browser window
+
+* Connect MetaMask to `http://localhost:8545` (with chain ID `99`)
+
+* Add the deployed token as an asset in MetaMask and check that the initial balance is zero
+
+* Export your MetaMask account (second account) address to a shell variable for later use:
+
+  ```bash
+  $ export RECIPIENT_ADDRESS=<RECIPIENT_ADDRESS>
+  ```
+
+* To get the primary account's address, run:
+
+  ```bash
+  $ docker exec $CONTAINER_ID yarn account:docker
+  ```
+
+* To get the current block hash at any time, run:
+
+  ```bash
+  $ docker exec $CONTAINER_ID yarn block:latest:docker
+  ```
+
+* Fire a GQL query in the playground to get the name, symbol and total supply of the deployed token:
+
+  ```graphql
+  query {
+    name(
+      blockHash: "LATEST_BLOCK_HASH"
+      token: "TOKEN_ADDRESS"
+    ) {
+      value
+      proof {
+        data
+      }
+    }
+
+    symbol(
+      blockHash: "LATEST_BLOCK_HASH"
+      token: "TOKEN_ADDRESS"
+    ) {
+      value
+      proof {
+        data
+      }
+    }
+
+    totalSupply(
+      blockHash: "LATEST_BLOCK_HASH"
+      token: "TOKEN_ADDRESS"
+    ) {
+      value
+      proof {
+        data
+      }
+    }
+  }
+  ```
+
+* Fire the following query to get balances for the primary and the recipient account at the latest block hash:
+
+  ```graphql
+  query {
+    fromBalanceOf: balanceOf(
+        blockHash: "LATEST_BLOCK_HASH"
+        token: "TOKEN_ADDRESS",
+        # primary account having all the balance initially
+        owner: "PRIMARY_ADDRESS"
+      ) {
+      value
+      proof {
+        data
+      }
+    }
+    toBalanceOf: balanceOf(
+        blockHash: "LATEST_BLOCK_HASH"
+        token: "TOKEN_ADDRESS",
+        owner: "RECIPIENT_ADDRESS"
+      ) {
+      value
+      proof {
+        data
+      }
+    }
+  }
+  ```
+
+  * The initial balance for the primary account should be `1000000000000000000000`
+  * The initial balance for the recipient should be `0`
+
+* Transfer tokens to the recipient account:
+
+  ```bash
+  $ docker exec $CONTAINER_ID yarn token:transfer:docker --token $TOKEN_ADDRESS --to $RECIPIENT_ADDRESS --amount 100
+  ```
+
+* Fire the above GQL query again with the latest block hash to get updated balances for the primary (`from`) and the recipient (`to`) account:
+
+  * The balance for the primary account should be reduced by the transfer amount (`100`)
+  * The balance for the recipient account should be equal to the transfer amount (`100`)
+
+* Transfer funds between different accounts using MetaMask and use the playground to query the balance before and after the transfer.
+
+## Clean up
+
+* To stop all the services running in background run:
+
+  ```bash
+  $ laconic-so deploy-system --include db,go-ethereum-foundry,ipld-eth-server,watcher-erc20 down
+  ```

stacks/erc20/stack.yml

@@ -0,0 +1,18 @@
+version: "1.0"
+name: erc20-watcher
+repos:
+  - cerc-io/go-ethereum
+  - cerc-io/ipld-eth-db
+  - cerc-io/ipld-eth-server
+  - cerc-io/watcher-ts
+containers:
+  - cerc/go-ethereum
+  - cerc/go-ethereum-foundry
+  - cerc/ipld-eth-db
+  - cerc/ipld-eth-server
+  - cerc/watcher-erc20
+pods:
+  - go-ethereum-foundry
+  - db
+  - ipld-eth-server
+  - watcher-erc20