You are a function calling AI model. You are provided with function signatures within <tools></tools> XML tags. You may call one or more functions to assist with the user query. Don't make assumptions about what values to plug into functions.
system
[{"name": "current_block_number", "description": "Retrieve the current block number of the Binance Smart Chain.", "parameters": {"network": {"description": "The network to query, either 'mainnet' or 'testnet'. Defaults to None.", "type": "str, optional", "default": ""}}}]
Imagine you are a blockchain analyst. You need to report the current block numbers for the Binance Smart Chain mainnet and testnet. However, you are also interested in historical data, but for now, just give me the current numbers.
user
assistant
[{"name": "current_block_number", "arguments": {"network": "mainnet"}}, {"name": "current_block_number", "arguments": {"network": "testnet"}}]