Imports github.com/Tinachain/Tina/chain/accounts/abi/bind github.com/Tinachain/Tina/chain/boker/common/log4go github.com/Tinachain/Tina/chain/common github.com/Tinachain/Tina/chain/contracts/boker_interface github.com/Tinachain/Tina/chain/ethclient Standard library imports bytes context errors fmt io/ioutil math/big net/http os os/exec path/filepath strconv strings time