Add validations.md

tasks/eth/2-add-superchainConfig/Validation.md

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+# Validation
+
+This document can be used to validate the state diff resulting from the execution of the upgrade
+transaction.
+
+Please ensure that the following changes (and none others) are made to each contract in the system.
+
+TODO: add diffyscan usage guidance for validating that new implementation addresses are running
+governance approved code.
+
+## Pre-upgrade deployed code
+
+The `SuperchainConfigProxy` has already been deployed and initialized. It's address
+`0x95703e0982140d16f8eba6d158fccede42f04a4c` appears in the state diff below in the contracts which
+will begin querying it for the paused status.
+
+- **Address Validation:** the address is
+  [listed](https://github.com/ethereum-optimism/optimism/blob/op-contracts/v1.2.0-rc.1/op-chain-ops/upgrades/l1.go#L34)
+   in the tooling used to generate
+  the upgrade transaction bundle, at the governance approved tagged commit in the Optimism repo.
+
+## State Overrides
+
+There should also be a single 'State Override' in the Foundation Safe contract
+(`0x9BA6e03D8B90dE867373Db8cF1A58d2F7F006b3A`) to enable the simulation by reducing the threshold to
+1:
+
+- **Key:** `0x0000000000000000000000000000000000000000000000000000000000000004` <br/>
+  **Value:** `0x0000000000000000000000000000000000000000000000000000000000000001`
+
+## State Changes
+
+**Notes:**
+- The value `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc` occurs
+  multiple times below, and corresponds to the storage key of the implementation address as defined
+  in
+  [Proxy.sol](https://github.com/ethereum-optimism/optimism/blob/op-contracts/v1.2.0-rc.1/packages/contracts-bedrock/src/universal/Proxy.sol#L104)
+  and
+  [Constants.sol](https://github.com/ethereum-optimism/optimism/blob/op-contracts/v1.2.0-rc.1/packages/contracts-bedrock/src/libraries/Constants.sol#L26-L27).
+- In order to minimize the validation effort, **"Before"** values are only included below when they are non-zero prior to the upgrade.
+
+### `0x229047fed2591dbec1ef1118d64f7af3db9eb290` (`SystemConfigProxy`)
+
+- **Key:** `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc` <br/>
+  **Value:** `0x00000000000000000000000033a032ec93ec0c492ec4bf0b30d5f51986e5a314` <br/>
+  **Meaning:** Implementation address is set to the new [`SystemConfig`](https://github.com/ethereum-optimism/optimism/blob/op-contracts/v1.2.0-rc.1/op-chain-ops/cmd/op-upgrade-extended-pause/main.go#L43-L46).
+
+### `0x25ace71c97b33cc4729cf772ae268934f7ab5fa1` (`L1CrossDomainMessengerProxy`)
+
+- **Key:** `0x0000000000000000000000000000000000000000000000000000000000000000` <br/>
+  **Before:** `0x000000000000000000000001de1fcfb0851916ca5101820a69b13a4e276bd81f` <br/>
+  **After:**  `0x0000000000000000000000010000000000000000000000000000000000000000` <br/>
+  **Meaning:** The "Before" value was `abi.encodePacked(true, address(libAddressManager)`. The boolean
+    value corresponds to the initialized state, which must be true. The address being deleted is
+    the `AddressManager`, it was used in the legacy L1xDM to look up the address of the CTC. It is
+    safe to delete because it is no longer in use, as shown by the presence of a [spacer](https://github.com/ethereum-optimism/optimism/blob/op-contracts/v1.2.0-rc.1/packages/contracts-bedrock/src/universal/CrossDomainMessenger.sol#L19)
+    in the current implementation.
+
+- **Key:** `0x00000000000000000000000000000000000000000000000000000000000000fb` <br/>
+  **After:** `0x00000000000000000000000095703e0982140d16f8eba6d158fccede42f04a4c` <br/>
+  **Meaning:** Sets the `SuperchainConfigProxy` address at slot `0xfb` (251). The correctness of
+   this slot is attested to in the Optimism repo at [storageLayout/L1CrossDomainMessenger.json](https://github.com/ethereum-optimism/optimism/blob/op-contracts/v1.2.0-rc.1/packages/contracts-bedrock/snapshots/storageLayout/L1CrossDomainMessenger.json#L122-L127).
+
+
+### `0x5a7749f83b81b301cab5f48eb8516b986daef23d` (`L1ERC721BridgeProxy`)
+
+- **Key:** `0x0000000000000000000000000000000000000000000000000000000000000000` <br/>
+  **After:** `0x0000000000000000000000000000000000000000000000000000000000000001` <br/>
+  **Meaning:** The `initialized` boolean is set to `true`.
+
+- **Key:** `0x0000000000000000000000000000000000000000000000000000000000000032` <br/>
+  **After:** `0x00000000000000000000000095703e0982140d16f8eba6d158fccede42f04a4c` <br/>
+  **Meaning:** Sets the `SuperchainConfigProxy` address at slot `0x32` (50). The correctness of
+   this slot is attested to in the Optimism repo at [storageLayout/L1ERC721Bridge.json](https://github.com/ethereum-optimism/optimism/blob/op-contracts/v1.2.0-rc.1/packages/contracts-bedrock/snapshots/storageLayout/L1ERC721Bridge.json#L31-L35).
+
+- **Key:** `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc` <br/>
+  **After:** `0x000000000000000000000000c599fa757c2bcaa5ae3753ab129237f38c10da0b` <br/>
+  **Meaning:** The implementation address is set to the [`L1ERC721Bridge`](https://github.com/ethereum-optimism/optimism/blob/op-contracts/v1.2.0-rc.1/op-chain-ops/cmd/op-upgrade-extended-pause/main.go#L31-L33).
+
+### `0x75505a97bd334e7bd3c476893285569c4136fa0f` (`OptimismMintableERC20FactoryProxy`)
+
+- **Key:** `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc` <br/>
+  **After:** `0x00000000000000000000000074e273220fa1cb62fd756fe6cbda8bbb89404ded` <br/>
+  **Meaning:** Implementation address is set to the new [`OptimismMintableERC20Factory`](https://github.com/ethereum-optimism/optimism/blob/op-contracts/v1.2.0-rc.1/op-chain-ops/cmd/op-upgrade-extended-pause/main.go#L51-L53).
+
+### `0x99c9fc46f92e8a1c0dec1b1747d010903e884be1` (`L1StandardBridgeProxy`)
+
+- **Key:** `0x0000000000000000000000000000000000000000000000000000000000000000` <br/>
+  **Before:** `0x00000000000000000000000025ace71c97b33cc4729cf772ae268934f7ab5fa1` <br/>
+  **After:** `0x0000000000000000000000000000000000000000000000000000000000000001` <br/>
+  **Meaning:** The `initialized` boolean is set to `true`. <br/>
+  **Additional Note:** The "Before" value which is being deleted is the address of the
+  `L1CrossDomainMessengerProxy`. This storage entry was an artifact of the pre-bedrock system. The
+  bedrock upgrade moved this value from storage into the contract's bytecode as an [`immutable` value](https://github.com/ethereum-optimism/optimism/blob/op-contracts/v1.2.0-rc.1/packages/contracts-bedrock/src/universal/StandardBridge.sol#L26).
+  It is no longer in use and is safe to delete.
+
+- **Key:** `0x0000000000000000000000000000000000000000000000000000000000000032` <br/>
+  **After:** `0x00000000000000000000000095703e0982140d16f8eba6d158fccede42f04a4c` <br/>
+  **Meaning:** Sets the `SuperchainConfigProxy` address at slot `0x32` (50). The correctness of
+   this slot is attested to in the Optimism repo at [storageLayout/L1StandardBridge.json](https://github.com/ethereum-optimism/optimism/blob/op-contracts/v1.2.0-rc.1/packages/contracts-bedrock/snapshots/storageLayout/L1StandardBridge.json#L31-L35).
+
+
+- **Key:** `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc` <br/>
+  **After:** `0x000000000000000000000000566511a1a09561e2896f8c0fd77e8544e59bfdb0` <br/>
+  **Meaning:** Implementation address is set to the new [`L1StandardBridge`](https://github.com/ethereum-optimism/optimism/blob/op-contracts/v1.2.0-rc.1/op-chain-ops/cmd/op-upgrade-extended-pause/main.go#L51-L53).
+
+### `0x9ba6e03d8b90de867373db8cf1a58d2f7f006b3a` (`SafeProxy`)
+
+- **Key:** `0x0000000000000000000000000000000000000000000000000000000000000005` <br/>
+  **After:** `0x0000000000000000000000000000000000000000000000000000000000000057` <br/>
+  **Meaning:** The Safe nonce is updated.<br/>
+  **Additional Note:** This number may be slightly different if other transactions have recently
+  been executed. The important thing is that it should change by 1.
+
+### `0xbeb5fc579115071764c7423a4f12edde41f106ed` (`OptimismPortalProxy`)
+
+- **Key:** `0x0000000000000000000000000000000000000000000000000000000000000035` <br/>
+  **After:** `0x000000000000000000000095703e0982140d16f8eba6d158fccede42f04a4c00` <br/>
+  **Meaning:** Sets the `SuperchainConfigProxy` address at slot `0x32` (50). The correctness of
+   this slot is attested to in the Optimism repo at [storageLayout/OptimismPortal.json](https://github.com/ethereum-optimism/optimism/blob/op-contracts/v1.2.0-rc.1/packages/contracts-bedrock/snapshots/storageLayout/OptimismPortal.json#L59-L63).
+
+- **Key:** `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc` <br/>
+  **After:** `0x000000000000000000000000ababe63514ddd6277356f8cc3d6518aa8bdeb4de` <br/>
+  **Meaning:** Implementation address is set to the new [`OptimismPortal`](https://github.com/ethereum-optimism/optimism/blob/op-contracts/v1.2.0-rc.1/op-chain-ops/cmd/op-upgrade-extended-pause/main.go#L39-L42).
+
+### `0xde1fcfb0851916ca5101820a69b13a4e276bd81f` (`AddressManager`)
+
+- **Key:** `0x515216935740e67dfdda5cf8e248ea32b3277787818ab59153061ac875c9385e` <br/>
+  **Before:** `0x0000000000000000000000002150bc3c64cbfddbac9815ef615d6ab8671bfe43` <br/>
+  **After:** `0x000000000000000000000000a95b24af19f8907390ed15f8348a1a5e6ccbc5c6` <br/>
+  **Meaning:** The name `OVM_L1CrossDomainMessenger` is set to the address of the new
+  `L1CrossDomainMessenger`. The correctness of this slot can be validated by verifying that the **Before** address matches both of the following cast calls
+  (please consider changing out the rpc url):
+  1. what is returned by calling `AddressManager.getAddress()`:
+   ```
+   cast call 0xde1fcfb0851916ca5101820a69b13a4e276bd81f 'getAddress(string)' 'OVM_L1CrossDomainMessenger' --rpc-url https://ethereum.publicnode.com
+   ```
+  2. what is currently stored at the key:
+   ```
+   cast st 0xde1fcfb0851916ca5101820a69b13a4e276bd81f 0x515216935740e67dfdda5cf8e248ea32b3277787818ab59153061ac875c9385e --rpc-url https://ethereum.publicnode.com
+   ```
+
+### `0xdfe97868233d1aa22e815a266982f2cf17685a27` (`L2OutputOracleProxy`)
+
+- **Key:** `0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc` <br/>
+  **After:** `0x000000000000000000000000db5d932af15d00f879cabebf008cadaaaa691e06` <br/>
+  **Meaning:** Implementation address is set to the new [`L2OutputOracle`](https://github.com/ethereum-optimism/optimism/blob/op-contracts/v1.2.0-rc.1/op-chain-ops/cmd/op-upgrade-extended-pause/main.go#L47-L50).