General

Q: What Bitcoin Core version is supported?

A: Bitcoin Core 24.0 and later.

Q: Is Bitcoin Core included with my node?

A: Yes, full Bitcoin Core access included with every Lightning node.

Q: Can I use my own Bitcoin Core node?

A: No, Comet provides managed Bitcoin Core infrastructure.

Q: What network is supported?

A: Both mainnet and testnet.

RPC Access

Q: How do I get RPC credentials?

A: comet bitcoin credentials --node_id

Q: What RPC methods are available?

A: All standard Bitcoin Core RPC methods.

Q: Are there rate limits?

A: Yes, 1000 requests/minute for standard accounts.

Q: Can I use bitcoin-cli?

A: Yes, with provided RPC credentials.

Wallets

Q: How do I create a wallet?

A: bitcoin-cli createwallet "wallet_name"

Q: Are descriptors supported?

A: Yes, descriptor wallets are recommended.

Q: Can I import existing wallets?

A: Yes, via seed phrase or private keys.

Q: How many wallets can I have?

A: No limit on wallet count.

Transactions

Q: What address types are supported?

A: Legacy, P2SH-SegWit, Native SegWit (Bech32), Taproot (Bech32m).

Q: What's the recommended address type?

A: Taproot (Bech32m) for new applications.

Q: How do I set transaction fees?

A: Use estimatesmartfee or settxfee.

Q: Can I use Replace-By-Fee (RBF)?

A: Yes, enable with replaceable=true parameter.

Blockchain

Q: Is the blockchain fully synced?

A: Yes, always synced to latest block.

Q: Can I query historical blocks?

A: Yes, full blockchain history available.

Q: What's the block time?

A: ~10 minutes average (Bitcoin network standard).

Q: Are there pruned nodes?

A: No, full archival nodes only.

Security

Q: Are RPC connections encrypted?

A: Yes, all connections use TLS.

Q: Should I expose RPC publicly?

A: No, use VPN or SSH tunnels for remote access.

Q: How do I secure my wallet?

A: Use encryptwallet command and strong passphrase.

Q: Are backups automatic?

A: Lightning backups are automatic. Export Bitcoin wallet backups manually.

Performance

Q: What's the RPC timeout?

A: 60 seconds default, configurable in client.

Q: Can I batch RPC calls?

A: Yes, use JSON-RPC batch requests.

Q: Are there caching mechanisms?

A: Yes, frequently accessed data is cached.

Troubleshooting

Q: Connection refused error?

A: Verify credentials and node status.

Q: Insufficient funds error?

A: Check wallet balance and UTXO availability.

Q: Transaction not confirming?

A: Check fee rate and mempool status. Use RBF to bump fee.

Q: Wallet not found?

A: Load wallet with loadwallet command.

Integration

Q: Which libraries are recommended?

A: Python: python-bitcoinrpc, JavaScript: bitcoin-core, Go: btcd/rpcclient

Q: Can I use with BTCPay Server?

A: Yes, configure BTCPay to use Comet RPC endpoint.

Q: Is there a REST API?

A: Bitcoin Core REST API is available alongside RPC.

Resources

• Bitcoin Core RPC: https://developer.bitcoin.org/reference/rpc/

• Comet Docs: https://docs.comet.dev/bitcoin-core

• Support: support@comet.dev