* use proper querystring builder * etherscan.txLink helper * refactor to etherscan.txLink * etherscan.addressLink helper * refactor to etherscan.addressLink * move txLink & addressLink into common file
* use proper querystring builder * etherscan.txLink helper * refactor to etherscan.txLink * etherscan.addressLink helper * refactor to etherscan.addressLink * move txLink & addressLink into common file