Get history of transactions

Returns the transaction history for one or more Bitcoin addresses or xpubs, treating them as part of the same wallet.

Key Points:

• Returns up to 200 most recent transactions
• Transactions sorted by time (newest first)
• Pending: transactions with < 2 confirmations
• Values can be negative (outgoing) or positive (incoming)
• When fiat_currency is provided, confirmed transactions include historical fiat values at transaction time