stack-orchestrator/stacks/erc20/README.md

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# 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:3002/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
```