Examples:
# List available assets:
$ mmgen-swaptxcreate -S
# Create a Tether-to-LTC swap transaction for autosigning, connecting to the
# swap quote server via Tor:
$ mmgen-swaptxcreate --autosign --proxy=localhost:9050 ETH.USDT 1000 LTC
# After signing, send the transaction via public Etherscan proxy over Tor:
$ mmgen-txsend --autosign --quiet --tx-proxy=etherscan --proxy=localhost:9050
# After sending, check the transaction status and receipt:
$ mmgen-txsend --autosign --verbose --status
# Create a Tether-to-DAI swap transaction, with explicit destination account:
$ mmgen-swaptxcreate ETH.USDT 1000 ETH.DAI E:01234ABC:3
Testing:
$ test/cmdtest.py -e ethswap
