EVM JSON-RPC

The EVM JSON-RPC API provides Ethereum-compatible access to Monolythium.

Endpoints

Network	HTTP	WebSocket
Sprintnet	https://rpc.sprintnet.monolythium.com:8545	wss://rpc.sprintnet.monolythium.com:8546
Testnet	https://rpc.testnet.monolythium.com:8545	wss://rpc.testnet.monolythium.com:8546
Mainnet	https://rpc.monolythium.com:8545	wss://rpc.monolythium.com:8546

Request Format

{
  "jsonrpc": "2.0",
  "method": "eth_chainId",
  "params": [],
  "id": 1
}

Core Methods

Chain Information

# Get chain ID
curl -X POST -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":1}' \
  https://rpc.sprintnet.monolythium.com:8545

# Get block number
curl -X POST -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}' \
  https://rpc.sprintnet.monolythium.com:8545

Account Methods

# Get balance
curl -X POST -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_getBalance","params":["0x...","latest"],"id":1}' \
  https://rpc.sprintnet.monolythium.com:8545

# Get transaction count (nonce)
curl -X POST -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_getTransactionCount","params":["0x...","latest"],"id":1}' \
  https://rpc.sprintnet.monolythium.com:8545

Transaction Methods

# Send raw transaction
curl -X POST -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_sendRawTransaction","params":["0x..."],"id":1}' \
  https://rpc.sprintnet.monolythium.com:8545

# Get transaction receipt
curl -X POST -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_getTransactionReceipt","params":["0x..."],"id":1}' \
  https://rpc.sprintnet.monolythium.com:8545

Contract Methods

# Call contract (read-only)
curl -X POST -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_call","params":[{"to":"0x...","data":"0x..."},"latest"],"id":1}' \
  https://rpc.sprintnet.monolythium.com:8545

# Estimate gas
curl -X POST -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_estimateGas","params":[{"to":"0x...","data":"0x..."}],"id":1}' \
  https://rpc.sprintnet.monolythium.com:8545

Supported Methods

eth Namespace

Method	Supported
eth_chainId	✅
eth_blockNumber	✅
eth_getBalance	✅
eth_getStorageAt	✅
eth_getTransactionCount	✅
eth_getCode	✅
eth_sendRawTransaction	✅
eth_call	✅
eth_estimateGas	✅
eth_getBlockByNumber	✅
eth_getBlockByHash	✅
eth_getTransactionByHash	✅
eth_getTransactionReceipt	✅
eth_getLogs	✅
eth_feeHistory	✅
eth_gasPrice	✅

net Namespace

Method	Supported
net_version	✅
net_listening	✅
net_peerCount	✅

web3 Namespace

Method	Supported
web3_clientVersion	✅
web3_sha3	✅

debug Namespace

Method	Supported
debug_traceTransaction	✅
debug_traceBlockByNumber	✅
debug_traceBlockByHash	✅

WebSocket Subscriptions

// Subscribe to new blocks
{"jsonrpc":"2.0","method":"eth_subscribe","params":["newHeads"],"id":1}

// Subscribe to logs
{"jsonrpc":"2.0","method":"eth_subscribe","params":["logs",{"address":"0x..."}],"id":1}

// Unsubscribe
{"jsonrpc":"2.0","method":"eth_unsubscribe","params":["0x...subscription_id..."],"id":1}

Error Codes

Code	Message
-32700	Parse error
-32600	Invalid request
-32601	Method not found
-32602	Invalid params
-32603	Internal error
-32000	Server error

Configuration

Enable EVM RPC in your node:

# app.toml
[json-rpc]
enable = true
address = "0.0.0.0:8545"
ws-address = "0.0.0.0:8546"
api = "eth,net,web3,txpool,debug"

Related

• RPC Endpoints - Detailed RPC guide
• Cosmos REST - REST API
• WebSocket - WebSocket details