Returns historical transactions for supplied account.
It does allow a negative position for finding the most recent actions, but if a negative number is specified, the following caveats apply:
- it will only start at the most recent transaction, only -1 is valid, cannot specify a lower offset.
- it will not allow paging
- it will always return 10 records.
Because of this limitation, getting the last 100 transactions for an account (for example) requires a call with the negative offset to find the highest position (using the last action in the returned array,) and then paging through the actions using positive pos and offset values. accountactionseq is the transaction count for the account, and is what should be used for paging.