add some CI

.github/workflows/test.yml

+name: Tests
+
+on: [push, pull_request]
+
+jobs:
+  unit:
+    name: Tests
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout Code
+      uses: actions/checkout@v2
+    - name: Install Go
+      run: |
+        sudo apt-get update
+        sudo apt-get -y --no-install-recommends install golang
+    - name: Build minigeth
+      run: |
+        (cd minigeth/ && go build)
+        mkdir -p /tmp/eth
+    - name: Test block 13284491
+      run: minigeth/go-ethereum 13284491
+    - name: Test block 13284469
+      run: minigeth/go-ethereum 13284469
+    - name: Test block 13284053
+      run: minigeth/go-ethereum 13284053
\ No newline at end of file

minigeth/main.go

@@ -72,6 +72,6 @@ func main() {
 	if block.Header().Root == newheader.Root {
 		fmt.Println("good transition")
 	} else {
-		fmt.Println("BAD transition :((")
+		panic("BAD transition :((")
 	}
 }

minigeth/oracle/prefetch.go

@@ -149,6 +149,7 @@ func PrefetchCode(blockNumber *big.Int, addrHash common.Hash) {
 }
 
 func PrefetchBlock(blockNumber *big.Int) {
+	// TODO: Write this.
 }
 
 func getProofAccount(blockNumber *big.Int, addr common.Address, skey common.Hash, storage bool) []string {