Regen docs

docs/accounts/erc7821.md

@@ -42,6 +42,14 @@ error UnsupportedExecutionMode()
 
 The execution mode is not supported.
 
+### BatchOfBatchesDecodingError()
+
+```solidity
+error BatchOfBatchesDecodingError()
+```
+
+Cannot decode `executionData` as a batch of batches `abi.encode(bytes[])`.
+
 ## Execution Operations
 
 ### execute(bytes32,bytes)
@@ -55,13 +63,20 @@ function execute(bytes32 mode, bytes calldata executionData)
 
 Executes the calls in `executionData`.   
 Reverts and bubbles up error if any call fails.   
-`executionData` encoding:   
+`executionData` encoding (single batch):   
 - If `opData` is empty, `executionData` is simply `abi.encode(calls)`.   
 - Else, `executionData` is `abi.encode(calls, opData)`.   
   See: https://eips.ethereum.org/EIPS/eip-7579   
+`executionData` encoding (batch of batches):   
+- `executionData` is `abi.encode(bytes[])`, where each element in `bytes[]`   
+  is an `executionData` for a single batch.   
 Supported modes:   
-- `bytes32(0x01000000000000000000...)`: does not support optional `opData`.   
-- `bytes32(0x01000000000078210001...)`: supports optional `opData`.   
+- `0x01000000000000000000...`: Single batch. Does not support optional `opData`.   
+- `0x01000000000078210001...`: Single batch. Supports optional `opData`.   
+- `0x01000000000078210002...`: Batch of batches.   
+For the "batch of batches" mode, each batch will be recursively passed into   
+`execute` internally with mode `0x01000000000078210001...`.   
+Useful for passing in batches signed by different signers.   
 Authorization checks:   
 - If `opData` is empty, the implementation SHOULD require that   
   `msg.sender == address(this)`.   
@@ -96,7 +111,17 @@ function _executionModeId(bytes32 mode)
     returns (uint256 id)
 ```
 
-0: invalid mode, 1: no `opData` support, 2: with `opData` support.
+0: invalid mode, 1: no `opData` support, 2: with `opData` support, 3: batch of batches.
+
+### _executeBatchOfBatches(bytes32,bytes)
+
+```solidity
+function _executeBatchOfBatches(bytes32 mode, bytes calldata executionData)
+    internal
+    virtual
+```
+
+For execution of a batch of batches.
 
 ### _execute(bytes32,bytes,Call[],bytes)
 

docs/utils/eip712.md

@@ -26,6 +26,16 @@ bytes32 internal constant _DOMAIN_TYPEHASH =
 
 `keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)")`.
 
+### _DOMAIN_TYPEHASH_SANS_CHAIN_ID
+
+```solidity
+bytes32 internal constant _DOMAIN_TYPEHASH_SANS_CHAIN_ID =
+    0x91ab3d17e3a50a9d89e63fd30b92be7f5336b03b287bb946787a83a9d62a2766
+```
+
+`keccak256("EIP712Domain(string name,string version,address verifyingContract)")`.   
+This is only used in `_hashTypedDataSansChainId`.
+
 ## Hashing Operations
 
 ### _domainSeparator()
@@ -63,6 +73,19 @@ bytes32 digest = _hashTypedData(keccak256(abi.encode(
 address signer = ECDSA.recover(digest, signature);   
 ```
 
+### _hashTypedDataSansChainId(bytes32)
+
+```solidity
+function _hashTypedDataSansChainId(bytes32 structHash)
+    internal
+    view
+    virtual
+    returns (bytes32 digest)
+```
+
+Variant that excludes the chain ID.   
+Optimized for smaller bytecode size over runtime gas, as it is intended to be used sparingly.
+
 ## EIP-5267 Operations
 
 ### eip712Domain()