can a BTC exchange be terminated before it has been affirmed, or is it that once communicated it is beyond the realm of imagination to expect to drop whenever
what is the meaning of you when the transaction or exchange occurs an error and hopes to return? I don't think that can be done, errors that are not from the system cannot be undone. Then from that when transacting, prioritize accuracy and read again if necessary and make sure the exchanges done are not error.