feat: make ProxyAdmin self-owned Proxy

Turns the ProxyAdmin into a Proxy that owns itself. Result of this is
that we can treat the ProxyAdmin as a Proxy which reduces some
complexity in the migration. We can then also upgrade the ProxyAdmin on
L2.

op-chain-ops/genesis/layer_two_test.go

@@ -65,7 +65,7 @@ func TestBuildL2DeveloperGenesis(t *testing.T) {
 		require.Equal(t, adminSlot, predeploys.ProxyAdminAddr.Hash())
 		require.Equal(t, account.Code, depB)
 	}
-	require.Equal(t, 2342, len(gen.Alloc))
+	require.Equal(t, 2343, len(gen.Alloc))
 
 	if writeFile {
 		file, _ := json.MarshalIndent(gen, "", " ")
@@ -92,5 +92,5 @@ func TestBuildL2DeveloperGenesisDevAccountsFunding(t *testing.T) {
 
 	gen, err := genesis.BuildL2DeveloperGenesis(config, block)
 	require.NoError(t, err)
-	require.Equal(t, 2320, len(gen.Alloc))
+	require.Equal(t, 2321, len(gen.Alloc))
 }

op-chain-ops/genesis/setters.go

@@ -108,7 +108,7 @@ func setProxies(db vm.StateDB, proxyAdminAddr common.Address, namespace *big.Int
 		bigAddr := new(big.Int).Or(namespace, new(big.Int).SetUint64(i))
 		addr := common.BigToAddress(bigAddr)
 
-		if UntouchablePredeploys[addr] || addr == predeploys.ProxyAdminAddr {
+		if UntouchablePredeploys[addr] {
 			log.Info("Skipping setting proxy", "address", addr)
 			continue
 		}
@@ -121,6 +121,7 @@ func setProxies(db vm.StateDB, proxyAdminAddr common.Address, namespace *big.Int
 		db.SetState(addr, AdminSlot, proxyAdminAddr.Hash())
 		log.Trace("Set proxy", "address", addr, "admin", proxyAdminAddr)
 	}
+
 	return nil
 }
 
@@ -156,18 +157,11 @@ func SetImplementations(db vm.StateDB, storage state.StorageConfig, immutable im
 			return fmt.Errorf("error converting to code namespace: %w", err)
 		}
 
-		// Proxy admin is a special case - it needs an impl set, but at its own address
-		if *address == predeploys.ProxyAdminAddr {
-			codeAddr = *address
-		}
-
 		if !db.Exist(codeAddr) {
 			db.CreateAccount(codeAddr)
 		}
 
-		if *address != predeploys.ProxyAdminAddr {
 		db.SetState(*address, ImplementationSlot, codeAddr.Hash())
-		}
 
 		if err := setupPredeploy(db, deployResults, storage, name, *address, codeAddr); err != nil {
 			return err
@@ -178,6 +172,7 @@ func SetImplementations(db vm.StateDB, storage state.StorageConfig, immutable im
 			return fmt.Errorf("code not set for %s", name)
 		}
 	}
+
 	return nil
 }
 

packages/contracts-bedrock/tasks/check-l2.ts

@@ -577,6 +577,9 @@ const check = {
 
     const addressManager = await ProxyAdmin.addressManager()
     console.log(`  - addressManager: ${addressManager}`)
+
+    await checkProxy(hre, 'ProxyAdmin')
+    await assertProxy(hre, 'ProxyAdmin')
   },
   // BaseFeeVault
   // - check version