ci: expose secrets to env

.github/workflows/go.yml

@@ -14,6 +14,10 @@ jobs:
           go-version: 1.18
       - uses: actions/checkout@v2
       - name: go test
+        env:
+          TOKEN_INDEX: ${{ secrets.TOKEN_INDEX }}
+          RPC_PROVIDER: ${{ secrets.RPC_PROVIDER }}
+          PRIVATE_KEY: ${{ secrets.PRIVATE_KEY }}
         run: go test -v -covermode atomic -coverprofile=covprofile ./...
       - name: install goveralls
         run: go install github.com/mattn/goveralls@latest