feat: Golang JSON RPC methods usage example.

Signed-off-by: Mariusz Jasuwienas <mariusz.jasuwienas@arianelabs.com>

tools/golang-json-rpc-tests/.env.sample

@@ -0,0 +1,7 @@
+# The operator private keys start with "0x" and are in hexadecimal format
+# Your account ECDSA hex-encoded private key (Ex: 0xb46751179bc8aa9e129d34463e46cd...)
+OPERATOR_PRIVATE_KEY='OPERATOR_PRIVATE_KEY'
+
+# Sample transaction already existing in the network. It will be used to check whether some of the RPC methods inquiring
+# transactions data are working correctly.
+TRANSACTION_HASH=4b970a3c02af09d646d2bc099b94d95cd2c9b7c92d1bf42e65eee0258016a234

tools/golang-json-rpc-tests/README.md

@@ -0,0 +1,41 @@
+# Hedera JSON RPC - Golang Tests Project
+
+This project offers boilerplate code for using golang client methods on Hedera JSON RPC api.
+It can be configured to communicate with both community-hosted and local ([Hedera Local Node](https://github.com/hashgraph/hedera-local-node)) instances of the [Hedera JSON RPC Relay](https://github.com/hashgraph/hedera-json-rpc-relay).
+
+## Requirements
+Install go: https://go.dev/doc/install
+
+## Setup
+
+1. Clone this repo to your local machine:
+
+```shell
+git clone https://github.com/hashgraph/hedera-json-rpc-relay.git
+```
+
+2. Once you've cloned the repository, open your IDE terminal and navigate to the root directory of the project:
+
+```shell
+cd hedera-json-rpc-relay/tools/golang-json-rpc-tests
+```
+
+3. Run the following command to install all the necessary dependencies:
+
+```shell
+go get github.com/ethereum/go-ethereum/ethclient \
+       github.com/ethereum/go-ethereum \
+       github.com/ethereum/go-ethereum/accounts/abi/bind \
+       github.com/ethereum/go-ethereum/crypto \
+       github.com/joho/godotenv
+```
+
+4. Get your Hedera testnet account hex encoded private key from the [Hedera Developer Portal](https://portal.hedera.com/register) and update the `.env.example` `OPERATOR_PRIVATE_KEY`
+
+5. Copy `.env.example` to `.env`
+
+6. Run the test script from the root directory of the project. The default network is set to "testnet."
+
+```shell
+go run .
+```

tools/golang-json-rpc-tests/go.mod

@@ -0,0 +1,41 @@
+module hedera-json-rpc-golang-tests-project
+
+        go 1.22.3
+
+        require (
+        github.com/ethereum/go-ethereum v1.14.3
+        github.com/joho/godotenv v1.5.1
+        github.com/stretchr/testify v1.8.4
+        )
+
+        require (
+        github.com/Microsoft/go-winio v0.6.1 // indirect
+        github.com/StackExchange/wmi v1.2.1 // indirect
+        github.com/bits-and-blooms/bitset v1.10.0 // indirect
+        github.com/btcsuite/btcd/btcec/v2 v2.2.0 // indirect
+        github.com/consensys/bavard v0.1.13 // indirect
+        github.com/consensys/gnark-crypto v0.12.1 // indirect
+        github.com/crate-crypto/go-kzg-4844 v1.0.0 // indirect
+        github.com/davecgh/go-spew v1.1.1 // indirect
+        github.com/deckarep/golang-set/v2 v2.1.0 // indirect
+        github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 // indirect
+        github.com/ethereum/c-kzg-4844 v1.0.0 // indirect
+        github.com/fsnotify/fsnotify v1.6.0 // indirect
+        github.com/go-ole/go-ole v1.3.0 // indirect
+        github.com/google/uuid v1.3.0 // indirect
+        github.com/gorilla/websocket v1.4.2 // indirect
+        github.com/holiman/uint256 v1.2.4 // indirect
+        github.com/mmcloughlin/addchain v0.4.0 // indirect
+        github.com/pmezard/go-difflib v1.0.0 // indirect
+        github.com/shirou/gopsutil v3.21.4-0.20210419000835-c7a38de76ee5+incompatible // indirect
+        github.com/supranational/blst v0.3.11 // indirect
+        github.com/tklauser/go-sysconf v0.3.12 // indirect
+        github.com/tklauser/numcpus v0.6.1 // indirect
+        golang.org/x/crypto v0.22.0 // indirect
+        golang.org/x/mod v0.17.0 // indirect
+        golang.org/x/sync v0.7.0 // indirect
+        golang.org/x/sys v0.19.0 // indirect
+        golang.org/x/tools v0.20.0 // indirect
+        gopkg.in/yaml.v3 v3.0.1 // indirect
+        rsc.io/tmplfunc v0.0.3 // indirect
+)

tools/golang-json-rpc-tests/go.sum

@@ -0,0 +1,74 @@
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