Support chain tx (#1365)

Support chain tx (#1365)

* Support chain tx

* Optimization code

* Optimization code

* Update test file

* Optimization code

* Fix chain tx packaging problem

* Review chain tx v2 (#1373)

* edit the code formate

* edit the code format

* edit the formate

* edit the code format

* edit the code format

* edit the dormat

* edit the code format

* edit the code format

* edit the code

* edit the code

* edit the code format

* edit the code format

* edit the code formate

* edit the code format

* edit the code

* add unit test for calcMergeGas

* add unit test for TestReserveBtmUtxoChain

* add unit test for TestBuildBtmTxChain

* edit for code style

* edit the api parameter

* fix wallet display bug