module.exports=function(hash, network) {const net =parseInt(network)let prefix
switch(net) {case1:// main net
prefix =''breakcase3:// ropsten test net
prefix ='ropsten.'breakcase4:// rinkeby test net
prefix ='rinkeby.'breakcase42:// kovan test net
prefix ='kovan.'breakdefault:
prefix =''}return`http://${prefix}etherscan.io/tx/${hash}`}