Retrieving ETH Balance
Obtaining the ETH balance is straightforward using the node's RPC interface. The primary method used is eth_getBalance.
Parameters:
- Wallet address to query.
Balance state:
"latest"(confirmed balance)."earliest"(genesis block balance)."pending"(includes unconfirmed transactions).
Example request:
{
"jsonrpc": "2.0",
"method": "eth_getBalance",
"params": ["0xc94770007dda54cF92009BFF0dE90c06F603a09f", "latest"],
"id": 1
}Example response:
{
"id": 1,
"jsonrpc": "2.0",
"result": "0x0234c8a3397aab58" // 158972490234375000
}Retrieving BTC Balance and UTXO List
Due to BTC’s UTXO model, directly querying a balance via RPC is inefficient. Nodes must scan the entire blockchain and maintain a local UTXO list, which can take over 20 minutes. A practical solution is to run a BTC block explorer like Insight-API, which offers:
- UTXO list retrieval.
- Historical transaction queries.
👉 Explore Insight-API for BTC data
Retrieving ETH Nonce
Nonce prevents double-spending in ETH transactions. Key rules:
- Transactions with too low a nonce are rejected.
- Too high a nonce halts processing until gaps are filled.
- Always fetch the
pendingnonce to avoid failures.
Use the eth_getTransactionCount RPC method:
Parameters:
- Wallet address.
- Nonce state:
"latest","earliest", or"pending"(recommended).
Example request:
{
"jsonrpc": "2.0",
"method": "eth_getTransactionCount",
"params": ["0xc94770007dda54cF92009BFF0dE90c06F603a09f", "latest"],
"id": 1
}Example response:
{
"id": 1,
"jsonrpc": "2.0",
"result": "0x1" // 1
}FAQ
1. Why does BTC balance retrieval take longer than ETH?
BTC’s UTXO model requires full blockchain scans, while ETH uses account-based balances for faster queries.
2. What happens if I use the wrong ETH nonce?
Transactions may stall or fail. Always use the pending nonce for real-time accuracy.
3. Can I query BTC UTXOs without a block explorer?
No—RPC services lack efficient UTXO tracking. Tools like Insight-API are essential.