Add ERC7579 Validators

.changeset/brown-flies-poke.md

@@ -0,0 +1,5 @@
+---
+'openzeppelin-solidity': minor
+---
+
+`ERC7579Multisig`: Add an abstract multisig module for ERC-7579 accounts using ERC-7913 signer keys.

.changeset/fine-teams-serve.md

@@ -0,0 +1,5 @@
+---
+'openzeppelin-solidity': minor
+---
+
+`SignatureChecker`: Add `isValidSignatureNowCalldata(bytes,bytes32,bytes)` and `areValidSignaturesNowCalldata(hash,bytes[],bytes[])` that take arguments in calldata rather than memory.

.changeset/shy-grapes-ask.md

@@ -0,0 +1,5 @@
+---
+'openzeppelin-solidity': minor
+---
+
+`ERC7579MultisigWeighted`: Add an abstract weighted multisig module that allows different weights to be assigned to signers.

.changeset/yummy-ideas-stay.md

@@ -0,0 +1,5 @@
+---
+'openzeppelin-solidity': minor
+---
+
+`ERC7579Validator`: Add abstract validator module for ERC-7579 accounts that provides base implementation for signature validation.

contracts/account/README.adoc

@@ -7,6 +7,9 @@ This directory includes contracts to build accounts for ERC-4337. These include:
  * {Account}: An ERC-4337 smart account implementation that includes the core logic to process user operations.
  * {AccountERC7579}: An extension of `Account` that implements support for ERC-7579 modules.
  * {AccountERC7579Hooked}: An extension of `AccountERC7579` with support for a single hook module (type 4).
+ * {ERC7579Validator}: Abstract validator module for ERC-7579 accounts that provides base implementation for signature validation.
+ * {ERC7579Multisig}: An extension of {ERC7579Validator} that enables validation using ERC-7913 signer keys.
+ * {ERC7579MultisigWeighted}: An extension of {ERC7579Multisig} that allows different weights to be assigned to signers.
  * {ERC7821}: Minimal batch executor implementation contracts. Useful to enable easy batch execution for smart contracts.
  * {ERC4337Utils}: Utility functions for working with ERC-4337 user operations.
  * {ERC7579Utils}: Utility functions for working with ERC-7579 modules and account modularity.
@@ -23,6 +26,14 @@ This directory includes contracts to build accounts for ERC-4337. These include:
 
 {{ERC7821}}
 
+=== Validators
+
+{{ERC7579Validator}}
+
+{{ERC7579Multisig}}
+
+{{ERC7579MultisigWeighted}}
+
 == Utilities
 
 {{ERC4337Utils}}