Function iota_client::get_transactions_to_approve

pub fn get_transactions_to_approve(
    uri: &str, 
    options: GetTransactionsToApproveOptions
) -> Result<GetTransactionsToApprove, Error>

Tip selection which returns trunkTransaction and branchTransaction. The input value depth determines how many milestones to go back to for finding the transactions to approve. The higher your depth value, the more work you have to do as you are confirming more transactions. If the depth is too large (usually above 15, it depends on the node's configuration) an error will be returned. The reference is an optional hash of a transaction you want to approve. If it can't be found at the specified depth then an error will be returned.