Allowance module: Add deployment instructions for contracts to README…

… and remove outdated networks from hardhat configuration (#494)

- Add deployment instructions for contracts to README
- remove outdated networks from hardhat configuration

modules/allowances/README.md

@@ -122,4 +122,26 @@ pnpm test
 ```bash
 pnpm i
 pnpm build
-```
+```
+
+## Deploying and verifying contracts
+
+Specify all the necessary environment variables in `.env`, following the `.env.sample` file.
+
+```bash
+pnpm i
+pnpm run deploy <network_name>
+```
+
+1. `network_name` is the name of the network you want to deploy to. It must be added to the hardhat config under `networks` beforehand.
+2. If the hardhat plugin cannot figure out the etherscan API url for the network, you can add it manually to `tasks/deploy_verify.ts`.
+Example:
+```ts
+await hre.run('etherscan-verify', {
+  forceLicense: true,
+  license: 'LGPL-3.0',
+  apiUrl: "https://api.gnosiscan.io"
+})
+```
+
+

modules/allowances/hardhat.config.ts

@@ -57,26 +57,10 @@ const config: HardhatUserConfig = {
       ...sharedNetworkConfig,
       url: 'https://rpc.gnosischain.com',
     },
-    ewc: {
-      ...sharedNetworkConfig,
-      url: `https://rpc.energyweb.org`,
-    },
-    goerli: {
-      ...sharedNetworkConfig,
-      url: `https://goerli.infura.io/v3/${INFURA_KEY}`,
-    },
-    mumbai: {
-      ...sharedNetworkConfig,
-      url: `https://polygon-mumbai.infura.io/v3/${INFURA_KEY}`,
-    },
     polygon: {
       ...sharedNetworkConfig,
       url: `https://polygon-mainnet.infura.io/v3/${INFURA_KEY}`,
     },
-    volta: {
-      ...sharedNetworkConfig,
-      url: `https://volta-rpc.energyweb.org`,
-    },
     bsc: {
       ...sharedNetworkConfig,
       url: `https://bsc-dataseed.binance.org/`,