http://mmgen-wallet.i2p/project/mmgen/mmgen-wallet/src/master/mmgen/help/swaptxcreate_examples.py
The full value of the inputs, minus miner fees, will be swapped and sent to an unused address in the user’s LTC tracking wallet: $ {gc.prog_name} BTC LTC Same as above, but swap 0.123 BTC, minus miner fees, and send the change to an unused address in the BTC tracking wallet: $ {gc.prog_name} BTC 0.123 LTC Same as above, but specify that the change address be a Segwit P2SH (‘S’) address: $ {gc.prog_name} BTC 0.123 S LTC Same as above, but additionally specify that the destination LTC address be a compressed...