fix(miniapp): validate publicKey and add log, so on

Description

[x] the pull request title describes what this PR does (not a vague title like Update readme.md)
[x] the pull request targets the default branch of the repository (develop)
[x] the code follows the established code style of the repository, such as:
- npm run prettier:check passes
- npm run eslint:check passes
[x] tests are added for the changes I made (if any source code was modified)
[x] documentation added or updated
[x] I have run the project locally and verified that there are no errors

fixes #[issue number], fixes #[issue number]