API GPN

process on api gpn docid\ tsphoctojecpccn5gf74b uses to register {{gpn}} {{transaction}} created for {{the}} first time docid\ nitggsucyt5lnvyfjqndi uses to perform {{gpn}} {{transaction}} {{process}} docid\ z6mz313pnsr5weunylyta uses to check {{the}} success {{gpn}} {{transaction}} {{status}} docid 81hgsjsh3rqwpk1ldtbl6 uses to check {{the}} ongoing {{gpn}} {{transaction}} {{status}} docid\ brn rji9jccr eakruqau uses to cancel {{the}} ongoing {{gpn}} {{transaction}}