This function returns the transaction IDs of the inputs for a given transaction.
txinids(con, txid)data.frame, the transaction ID(s) and
the position(s) of the previous UTXO(s).
CONRPC, configuration object.
character, the id of the transaction.
Bernhard Pfaff
Other UtilityFuncs: bkfee,
blockattime, blockstats,
date2int, int2date,
intMaxDay, intMinDay,
intRangeDay, intRangePeriod,
timeofblock, txfee,
txids, txstats,
utxoage, utxotype,
utxovalue