docs: add description how to verify contract with Foundry

docs/tools.md

@@ -0,0 +1,50 @@
+# Tools
+
+## Foundry
+
+You can verify contracts using Foundry in Hedera using our verification service.
+Our verification service instance is located at `https://server-verify.hashscan.io`.
+
+Once you have a running Foundry example, you can deploy and verify it with our verification service, for example
+
+```console
+forge create --rpc-url https://testnet.hashio.io/api \
+  --private-key <your_private_key> src/Counter.sol:Counter \
+  --verify \
+  --verifier sourcify \
+  --verifier-url https://server-verify.hashscan.io
+```
+
+After the contract has been verified, you can check its sources in the verification repository, for example see `https://repository-verify.hashscan.io/contracts/full_match/296/0x559e79D4Edf86E772840eFc2ee4CFC37bB500f2F/`.
+
+Tracking issue <https://github.com/hashgraph/hedera-sourcify/issues/122>.
+
+### Running the verification service locally
+
+Make sure you are running a local node instance and grab one of the alias ECDSA keys.
+
+```console
+hedera start -d --network local
+```
+
+Create a new Foundry project
+
+```console
+forge init hello_foundry
+```
+
+Start the local verification service
+
+```console
+npm run server:start
+```
+
+Deploy and verify the contract locally
+
+```console
+forge create --rpc-url http://localhost:7546 \
+  --private-key <your_private_key> src/Counter.sol:Counter \
+  --verify \
+  --verifier sourcify \
+  --verifier-url http://localhost:5002
+```