json rpc evm

QoreChain implements a fully EVM-compatible JSON-RPC interface, enabling standard Ethereum tooling (MetaMask, Hardhat, Foundry, ethers.js, web3.js) to interact with the chain without modification.

Connection

Transport	Default Address
HTTP	http://localhost:8545
WebSocket	ws://localhost:8546

Supported Namespaces

Namespace	Description
eth_	Core Ethereum JSON-RPC methods
web3_	Utility methods (client version, hashing)
net_	Network status methods
txpool_	Transaction pool inspection
qor_	QoreChain-specific extensions (see qor_ Namespace)

eth_ Methods

Method	Parameters	Description
eth_blockNumber	none	Returns the latest block number
eth_getBalance	address, blockNumber	Returns the balance of an address in wei
eth_getTransactionCount	address, blockNumber	Returns the nonce (transaction count) for an address
eth_sendRawTransaction	signedTxData	Submits a signed transaction for broadcast
eth_call	callObject, blockNumber	Executes a read-only call against the EVM
eth_estimateGas	callObject	Estimates the gas required for a transaction
eth_getBlockByNumber	blockNumber, fullTx (bool)	Returns block data by number
eth_getTransactionByHash	txHash	Returns transaction data by hash
eth_getTransactionReceipt	txHash	Returns the receipt for a mined transaction
eth_getLogs	filterObject	Returns logs matching a filter
eth_chainId	none	Returns the chain ID (hex-encoded)
eth_gasPrice	none	Returns the current gas price in wei
eth_feeHistory	blockCount, newestBlock, rewardPercentiles	Returns historical fee data (EIP-1559)

web3_ Methods

Method	Parameters	Description
web3_clientVersion	none	Returns the client version string
web3_sha3	data (hex)	Returns the Keccak-256 hash of the input

net_ Methods

Method	Parameters	Description
net_version	none	Returns the network ID
net_listening	none	Returns true if the node is listening
net_peerCount	none	Returns the number of connected peers (hex)

Configuration

Enable and configure the JSON-RPC server in app.toml:

[json-rpc]
# Enable the JSON-RPC server
enable = true

# HTTP server address
address = "0.0.0.0:8545"

# WebSocket server address
ws-address = "0.0.0.0:8546"

# Enabled API namespaces
api = "eth,web3,net,txpool,qor"

# Maximum number of logs returned by eth_getLogs
filter-cap = 10000

# Maximum gas for eth_call and eth_estimateGas
gas-cap = 25000000

# EVM execution timeout
evm-timeout = "5s"

# Transaction fee cap (in QOR)
txfee-cap = 1

# Maximum open WebSocket connections
max-open-connections = 0

Examples

eth_blockNumber

Request:

curl -X POST http://localhost:8545 \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_blockNumber",
    "params": [],
    "id": 1
  }'

Response:

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": "0x53b35"
}

eth_getBalance

Request:

curl -X POST http://localhost:8545 \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_getBalance",
    "params": ["0x742d35Cc6634C0532925a3b844Bc9e7595f2bD28", "latest"],
    "id": 2
  }'

Response:

{
  "jsonrpc": "2.0",
  "id": 2,
  "result": "0x56bc75e2d63100000"
}

Connecting with ethers.js

import { ethers } from "ethers";

const provider = new ethers.JsonRpcProvider("http://localhost:8545");

// Get latest block
const block = await provider.getBlockNumber();
console.log("Latest block:", block);

// Get balance
const balance = await provider.getBalance("0x742d35Cc6634C0532925a3b844Bc9e7595f2bD28");
console.log("Balance:", ethers.formatEther(balance), "QOR");

• Chain ID is returned as a hex string. Convert to decimal for wallet configuration.

• Gas pricing follows the EIP-1559 model. Use eth_feeHistory for base fee and priority fee estimation.

• Block tags accepted: "latest", "earliest", "pending", or a hex block number.

• Filter limitations: eth_getLogs is capped at filter-cap results per query (default 10,000). Use narrower block ranges for large datasets.