feat(ui-ux): call endpoint to save tx

[chloezxyy]

What this PR does / why we need it:

Which issue(s) does this PR fixes?:

Fixes #

Additional comments?:

Developer Checklist:

• [ ] Read your code changes at least once
• [ ] Tested on iOS/Android device (e.g, No crashes, library supported etc.)
• [ ] No console errors on web
• [ ] Tested on Light mode and Dark mode*
• [ ] Your UI implementation visually matched the rendered design*
• [ ] Unit tests*
• [ ] Added e2e tests*
• [ ] Added translations*

[github-actions[bot]]

Missing Translations Report

The following translations are missing for this pull request.

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[github-actions[bot]]

Build preview for DeFiChain Wallet is ready!

Built with commit ba2e1be89b301d491b6543e8cda47a7a15a59b2f

https://expo.io/@defichain/wallet?release-channel=pr-preview-4157

[codecov-commenter]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (b2d55e5) 55.94% compared to head (86c2572) 54.81%.

Files	Patch %	Lines
...p/app/components/OceanInterface/OceanInterface.tsx	66.66%	5 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #4157 +/- ## ========================================== - Coverage 55.94% 54.81% -1.13% ========================================== Files 438 438 Lines 12486 12501 +15 Branches 4135 4141 +6 ========================================== - Hits 6985 6853 -132 - Misses 5417 5564 +147 Partials 84 84 ```

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