fix: Update/fix testnet support

common-contracts/.gitignore

@@ -1,10 +1,8 @@
 /artifacts
-cache
-contracts.json
-coverage*
-deployments/localhost
-deployments/*/solcInputs/*.json
+abi
 dist
+deployments
+export
 node_modules
 src/types
 test/*/

common-contracts/README.md

@@ -17,24 +17,38 @@ yarn && yarn build
 
 Usually, DApps that require these contracts will specify their deployment within their corresponding `docker-compose.override.yml` file.
 
-Additionally, the project can be deployed manually on the local development network by running `yarn deploy`.
+Additionally, the project can be deployed manually on the local development network by running `yarn deploy`. Manual deployment to other supported testnets can be done by executing `yarn deploy:<network>`.
 
-Manual deployment to other supported testnets can also be done.
 
-As a first step, set a 12-word mnemonic phrase:
+## SimpleERC20 Contract
+
+This is a simple contract to perform operations with fungible tokens.
+
+To use it, you must first retrieve the contract address from the deployment data.
+For the local development network, execute the following command:
 
 ```shell
-export MNEMONIC=<12-word backup phrase>
+ERC_20=$(jq '.address' ./deployments/localhost/SimpleERC20.json | \
+    sed "s/[\",]//g")
 ```
 
-Then, in the case of deployments to Ethereum networks, set an Infura project ID:
+With that in place, you can make transactions such as transferring tokens between accounts:
 
 ```shell
-export PROJECT_ID=<Infura project ID>
+cast send $ERC_20 \
+    "transfer(address,uint256)(bool)" \
+    0x70997970C51812dc3A010C7d01b50e0d17dc79C8 \
+    1000 \
+    --mnemonic "test test test test test test test test test test test junk" \
+    --mnemonic-index 0 \
+    --rpc-url "http://localhost:8545"
 ```
 
-Finally, execute:
+The balance of an address can also be queried with the following command:
 
 ```shell
-yarn deploy:<network>
+cast call $ERC_20 \
+    "balanceOf(address)(uint32)" \
+    0x70997970C51812dc3A010C7d01b50e0d17dc79C8 \
+    --rpc-url "http://localhost:8545"
 ```