truffle console --network testnet
truffle(testnet)> HarmonyERC20.deployed().then(function(instance){myHRC20=instance})
truffle(testnet)> myHRC20.symbol()
truffle(testnet)> myHRC20.name()
truffle(testnet)> myHRC20.decimals()
BN { negative: 0, words: [ 18, <1 empty item> ], length: 1, red: null }
truffle(testnet)> myHRC20.totalSupply()
words: [ 16777216, 62077800, 20718012, 3, <1 empty item> ],