Update ERC-7656: Fix interface id

Merged by EIP-Bot.

Author: sullof

ERCS/erc-7656.md

@@ -8,7 +8,7 @@ status: Review
 type: Standards Track
 category: ERC
 created: 2024-03-15
-requires: 165, 721, 1155, 1167, 4337, 6551
+requires: 20, 165, 721, 1155, 1167, 4337, 6551
 ---
 
 ## Abstract
@@ -124,7 +124,7 @@ The `mode` parameter (being `bytes12`) allows for future extensions beyond these
 
 ### Deployment Requirements
 
-Any `ERC7656Factory` implementation MUST support the `IERC7656Factory` interface ID (`0xc6bdc908`).
+Any `ERC7656Factory` implementation MUST support the `IERC7656Factory` interface ID (`0x9e23230a`).
 
 Each linked service MUST be deployed as an [ERC-1167](./eip-1167.md) minimal proxy, appending immutable constant data to the bytecode. The deployed bytecode structure is:
 
@@ -170,7 +170,7 @@ Rather than creating separate standards for NFT extensions and account extension
 
 ### Mode Parameter Design
 
-The `mode` parameter uses 12 bytes instead of a simple boolean flag because the 12-byte format reserves space for future linking modes beyond the initial two (NFT linking and account linking). For example, if a service is associated to an [ERC-1155](./eip-1155.md) token but requires that the balance of the user is more than 1000 tokens, the mode could be `0x000000000000000000003e802`, where the least significant byte, `0x02` is the primary mode and the rest is the minimum required balance.
+The `mode` parameter uses 12 bytes instead of a simple boolean flag because the 12-byte format reserves space for future linking modes beyond the initial two (NFT linking and account linking). For example, if a service is associated to an [ERC-1155](./eip-1155.md) token but requires that the balance of the user is more than 1000 tokens, the mode could be `0x000000000000000000003e802`, where the least significant byte, `0x02` is the primary mode and the rest is the minimum required balance. Similarly, someone can think of a service associated to [ERC-20](./eip-20.md) tokens that requires a specific balance where the required balance can be put in the `linkedId` field, and the `mode` specified accordingly. 
 
 ### Deterministic Addressing