GIWA

GetBlock provides fast and reliable access to GIWA nodes via JSON-RPC API. Connect to the GIWA network without running your own infrastructure.

GIWA is an EVM-compatible Layer 2 built on the OP Stack as an optimistic rollup, developed by Dunamu — the operator of the Upbit exchange — together with the Optimism Foundation. GIWA Sepolia is its public test network, connected to Ethereum Sepolia for settlement and bridging, where developers validate contracts and integrations before mainnet. The network targets roughly one-second block times and supports Flashblocks preconfirmations for faster user-facing feedback.

Because GIWA is EVM-equivalent, standard Ethereum JSON-RPC methods and tooling such as Foundry, Hardhat, Ethers.js, and Viem work without modification. Native gas is paid in ETH.

Key Features

• OP Stack Layer 2: Optimistic rollup built on the OP Stack, posting data to and settling on Ethereum

• Sub-Second Blocks: Approximately one-second block times for fast transaction inclusion

• Flashblocks Preconfirmations: A Flashblocks-aware endpoint streams preconfirmations (~200 ms) ahead of full block production

• EVM Equivalence: Runs standard Solidity and EVM bytecode unmodified, with the full Ethereum JSON-RPC surface

• ETH Gas Token: Transactions are paid in ETH with 18 decimals

• Ethereum-Backed Security: Inherits data availability and settlement guarantees from Ethereum Sepolia

• Deterministic Predeploys: Standard OP Stack predeploys at fixed 0x42... addresses (WETH, GasPriceOracle, bridge contracts)

• Ethereum Tooling: Compatible with MetaMask, Foundry, Hardhat, Remix, Ethers.js, and Viem

TECHNICAL DISCLAIMER: AUTHORITATIVE JSON-RPC API SPECIFICATION.

GetBlock's RPC API reference documentation is provided exclusively for informational purposes and to optimize the developer experience. The canonical and normative specification for Ethereum Virtual Machine (EVM) JSON-RPC methods is solely maintained and published through the official Ethereum Foundation documentation portal at ethereum.org. This resource constitutes the sole authoritative reference implementation of the JSON-RPC 2.0 protocol interface across EVM-compatible execution clients.

Network Information

Property	Value
Network Name	GIWA
Chain ID	91342
Native Currency	ETH
Decimals	18
Block Time	~1 second
Consensus	Optimistic Rollup (OP Stack)
EVM Compatible	Yes

Base URL

Singapore, Singapore

https://shared.ap-southeast-1.getblock.io/<ACCESS-TOKEN>/

Supported Networks

Network	Chain ID	JSON-RPC	WSS	Singapore, Singapore
Sepolia	91342	✅	✅	✅

Quickstart

Javascript(Axios)

1

Setup project

mkdir giwa-api-quickstart && cd giwa-api-quickstart && npm init --yes

2

Install dependency

npm install axios

3

Create file

touch index.js

4

Set ES module type

Add "type": "module" to package.json.

5

Add code

index.js

const axios = require('axios');

const url = 'https://shared.ap-southeast-1.getblock.io/<ACCESS-TOKEN>/';

const payload = {
  jsonrpc: '2.0',
  method: 'eth_chainId',
  params: [],
  id: 'getblock.io'
};

axios.post(url, payload, {
  headers: { 'Content-Type': 'application/json' }
})
.then(response => {
  const blockNumber = parseInt(response.data.result, 16);
  console.log('Current Block Number:', blockNumber);
})
.catch(error => console.error(error));

6

Run the script

node index.js

7

Result

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "0x164ce"
}

Python(Request)

1

Setup project

mkdir giwa-api-quickstart && cd giwa-api-quickstart
python -m venv venv && source venv/bin/activate

2

Install dependency

pip install requests

3

Create file

touch main.py

4

Add code

main.py

import requests
import json

url = "https://shared.ap-southeast-1.getblock.io/<ACCESS-TOKEN>/"

payload = json.dumps({
    "jsonrpc": "2.0",
    "method": "eth_chainId",
    "params": [],
    "id": "getblock.io"
})

headers = {
    'Content-Type': 'application/json'
}

response = requests.post(url, headers=headers, data=payload)
print(response.text)

5

Run the script

python main.py

Available API Methods

Chain & Client Info

Method	Description
web3_clientVersion	Client software version identifier
web3_sha3	Keccak-256 hash of hex-encoded data
net_version	Network ID as a decimal string
net_listening	Whether the node is listening for P2P connections
net_peerCount	Number of connected peers
eth_chainId	Chain ID per EIP-155
eth_blockNumber	Current chain tip block number
eth_syncing	Sync status, or false if fully synced

Gas & Fees

Method	Description
eth_gasPrice	Legacy gas price estimate in wei
eth_maxPriorityFeePerGas	Suggested EIP-1559 priority fee in wei
eth_blobBaseFee	Current blob base fee for EIP-4844 transactions
eth_feeHistory	Historical base fees and priority-fee percentiles

Account & State

Method	Description
eth_getBalance	ETH balance of an address at a given block
eth_accounts	Accounts owned by the client
eth_getStorageAt	Value at a specific contract storage slot
eth_getTransactionCount	Address nonce (transaction count)
eth_getCode	Deployed bytecode at an address
eth_getProof	Merkle-Patricia proof for account and storage

Blocks

Method	Description
eth_getBlockByHash	Block data by block hash
eth_getBlockByNumber	Block data by block number or tag
eth_getBlockTransactionCountByHash	Transaction count in a block, by hash
eth_getBlockTransactionCountByNumber	Transaction count in a block, by number
eth_getBlockReceipts	All transaction receipts for a block

Transactions

Method	Description
eth_getTransactionByHash	Transaction data by transaction hash
eth_getTransactionByBlockHashAndIndex	Transaction by block hash and index
eth_getTransactionByBlockNumberAndIndex	Transaction by block number and index
eth_getTransactionReceipt	Transaction receipt with status, gas, and logs

Execution & Simulation

Method	Description
eth_call	Execute a message call without a transaction
eth_estimateGas	Estimate gas required to execute a transaction
eth_createAccessList	Compute an EIP-2930 access list for a transaction
eth_simulateV1	Simulate a bundle of transactions against a block

Filters & Logs

Method	Description
eth_newFilter	Create a log filter with address and topic criteria
eth_newBlockFilter	Create a filter for new block hashes
eth_newPendingTransactionFilter	Create a filter for pending transaction hashes
eth_uninstallFilter	Remove a previously created filter
eth_getFilterChanges	Poll new entries for a filter since the last poll
eth_getFilterLogs	Get all logs matching a log filter
eth_getLogs	Query logs matching criteria in one call

Transaction Submission

Method	Description
eth_sendRawTransaction	Submit a signed transaction to the network

WebSocket Subscriptions

Method	Description
eth_subscribe	Subscribe to newHeads, logs, newPendingTransactions, or syncing
eth_unsubscribe	Cancel an active subscription

RPC Module Discovery

Method	Description
rpc_modules	List available RPC modules and their versions

Debug & Trace

Method	Description
debug_accountRange	Enumerate accounts from the state trie
debug_batchSendRawTransaction	Submit multiple signed transactions in one call
debug_getBadBlocks	List recently rejected invalid blocks
debug_storageRangeAt	Enumerate storage slots of a contract
debug_traceBlock	Trace execution of a block by RLP
debug_traceBlockByHash	Trace all transactions in a block by hash
debug_traceBlockByNumber	Trace all transactions in a block by number
debug_traceCall	Trace a simulated message call
debug_traceTransaction	Trace execution of a mined transaction

Support

For technical support and questions:

• Support: [e-mail]

See Also

• GIWA Documentation

• GIWA Explorer (Blockscout)

• GIWA Website

• Ethereum JSON-RPC Specification