assert_eq!("tb".parse::<Currency>(), Ok(Currency::BitcoinTestnet));
assert_eq!("bcrt".parse::<Currency>(), Ok(Currency::Regtest));
assert_eq!("sb".parse::<Currency>(), Ok(Currency::Simnet));
assert_eq!("tb".parse::<Currency>(), Ok(Currency::BitcoinTestnet));
assert_eq!("bcrt".parse::<Currency>(), Ok(Currency::Regtest));
assert_eq!("sb".parse::<Currency>(), Ok(Currency::Simnet));