Replace coveralls with codecov server for coverage report

Author: GideonBature

.github/workflows/code_coverage.yml

@@ -1,15 +1,18 @@
 name: Code Coverage
 
-# Generates code coverage reports using grcov and uploads results to Coveralls.
+# Generates code coverage reports using grcov and uploads results to Codecov.
 # Runs on every push and pull request to track test coverage metrics.
-# Uploads coverage data to Coveralls for tracking and produces an HTML report artifact for download.
+# Uploads coverage data to Codecov for tracking and produces an HTML report artifact for download.
 
 on: [push, pull_request]
 
-permissions: {}
+permissions:
+  contents: read
+  pull-requests: write
+  id-token: write
 
 jobs:
-  Codecov:
+  Coverage:
     name: Code Coverage
     runs-on: ubuntu-latest
     env:
@@ -40,13 +43,14 @@ jobs:
         run: grcov . --binary-path ./target/debug/ -s . -t lcov --branch --ignore-not-existing --keep-only 'src/**' --ignore 'tests/**' --ignore 'examples/**' -o ./coverage/lcov.info
       - name: Generate HTML coverage report
         run: genhtml -o coverage-report.html --ignore-errors unmapped ./coverage/lcov.info
-      - name: Coveralls upload
-        # Action pinned at tag 2.3.6
-        uses: coverallsapp/github-action@648a8eb78e6d50909eff900e4ec85cab4524a45b
+      - name: Codecov upload
+        uses: codecov/codecov-action@v4
         with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
           file: ./coverage/lcov.info
-          format: lcov
+          flags: rust
+          name: codecov-bdk-wallet
+          use_oidc: true
+          fail_ci_if_error: false
       - name: Upload artifact
         uses: actions/upload-artifact@v4
         with: