add: /sapi/v1/convert

[nlypage]

No description provided.

[xyq-c-cpp]

hello, have you use these funcitons to make a real transaction? @nlypage

[xyq-c-cpp]

the latest master is ahead of your forked master branch, you should merge the latest master branch to your master.so, you shouldn't develop on your master branch. you should new a branch and then do your development on the new branch. finally you can push the new branch to remote and then open a PR.

[nlypage]

hello, have you use these funcitons to make a real transaction? @nlypage

Hi!, yep, I have added them to the needs of my project