add chain targets

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 93.27731% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 90.61%. Comparing base (1f524d4) to head (616462b).

Files	Patch %	Lines
src/target/chain.c	92.92%	5 Missing and 3 partials :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## latest #411 +/- ## ========================================== + Coverage 90.54% 90.61% +0.07% ========================================== Files 46 47 +1 Lines 4188 4307 +119 Branches 556 572 +16 ========================================== + Hits 3792 3903 +111 - Misses 273 278 +5 - Partials 123 126 +3 ```

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[sonarcloud[bot]]

Quality Gate passed

Issues
5 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud