fix: airnode-protocol README and scripts updates

.changeset/little-spies-decide.md

@@ -0,0 +1,5 @@
+---
+'@api3/airnode-protocol': patch
+---
+
+Minor README and scripts updates

packages/airnode-protocol/README.md

@@ -21,8 +21,13 @@ yarn run test:coverage
 yarn run test:gas
 ```
 
-Deploy the contracts on a network (`<NETWORK>` must be one of the names from `credentials.example.json`), verify the
-deployment
+### Contract deployment
+
+To deploy the contracts on a network first copy `example.env` to `.env`. Enter a mnemonic and any appropriate API keys.
+Note that the mnemonic must be present (though can be arbitrary) even if the exclusive goal is contract verification.
+The `<NETWORK>` in the below commands must correspond to a filename (without the `.json` extension) from
+https://github.com/api3dao/chains/tree/main/chains. If a hardhat error occurs during verification stating that a json
+file in `artifacts/build-info` is missing, running `yarn run clean` followed by `yarn run compile` should fix it.
 
 ```sh
 # Deploys deterministically (does not work on some chains)
@@ -34,8 +39,14 @@ NETWORK=<NETWORK> yarn run deploy:undeterministic
 # Verifies the deployment on the respective block explorer (not supported for some chains)
 NETWORK=<NETWORK> yarn run deploy:verify
 
-# Verifies the deployment locally (only works for undeterministic deployments)
-NETWORK=<NETWORK> yarn run deploy:verify-local
+# Verifies the deployments locally
+yarn run test:verify-local
+
+# The same as above, but for a specific network
+NETWORK=<NETWORK> yarn run test:verify-local:network
+
+# Generates deployments/references.json
+yarn run deploy:generate-references
 ```
 
 ### Deterministic deployment addresses
@@ -46,6 +57,8 @@ RequesterAuthorizerWithAirnode: 0xf18c105D0375E80980e4EED829a4A68A539E6178
 
 AccessControlRegistry: 0x92E5125adF385d86beDb950793526106143b6Df1
 
+AirnodeRrpV0DryRun: 0x2e768206bf5112e7D7efAf1d9df614C26475193f
+
 ### Integration notes
 
 - `arbitrum`, `avalanche`, `metis` and their testnets do not support deterministic deployment and are deployed

packages/airnode-protocol/package.json

@@ -10,7 +10,7 @@
   ],
   "scripts": {
     "build": "yarn run clean && yarn compile",
-    "clean": "rimraf -g ./src/contracts *.tsbuildinfo ./dist ./build *.tgz",
+    "clean": "rimraf -g ./src/contracts *.tsbuildinfo ./dist ./build *.tgz && yarn run hardhat clean",
     "compile": "yarn run compile:contracts && yarn run compile:tsc",
     "compile:contracts": "hardhat compile",
     "compile:tsc": "yarn compile:contract-dts && yarn compile:copy-contract-dts && tsc --build tsconfig.json",

packages/airnode-protocol/scripts/generate-references.ts

@@ -30,4 +30,4 @@ const networks = Object.entries(references.chainNames).reduce((acc, [chainId, na
 }, {});
 references.networks = networks;
 
-fs.writeFileSync(path.join('deployments', 'references.json'), JSON.stringify(references, null, 2));
+fs.writeFileSync(path.join('deployments', 'references.json'), JSON.stringify(references, null, 2) + '\n');