docs: update raw ECDSA and EIP-191 sig mentions (#14)

Author: nksazonov

docs/erc-7824.md

@@ -49,12 +49,6 @@ The Nitrolite protocol defines the following core data structures:
 #### Basic Types
 
 ```solidity
-struct Signature {
-    uint8 v;
-    bytes32 r;
-    bytes32 s;
-}
-
 struct Amount {
     address token;   // ERC-20 token address (address(0) for native tokens)
     uint256 amount;  // Token amount
@@ -86,7 +80,7 @@ struct State {
     uint256 version;         // State version incremental number to compare most recent
     bytes data;             // Application data encoded, decoded by the adjudicator
     Allocation[] allocations; // Asset allocation and destination for each participant
-    Signature[] sigs;        // stateHash signatures from participants
+    bytes[] sigs;            // stateHash signatures from participants
 }
 
 enum StateIntent {
@@ -132,14 +126,15 @@ For signature verification, the state hash is computed as:
 bytes32 stateHash = keccak256(
     abi.encode(
         channelId,
-        state.data,
+        state.intent,
         state.version,
+        state.data,
         state.allocations
     )
 );
 ```
 
-Note: The stateHash is bare signed without EIP-191 since the protocol is intended to be chain-agnostic.
+Note: The smart contract supports all popular signature formats, specifically: raw ECDSA, EIP-191, EIP-712, EIP-1271, and EIP-6492.
 
 ### Interfaces
 
@@ -218,7 +213,7 @@ interface IChannel {
      * @param sig Signature of the participant on the funding state
      * @return channelId Unique identifier for the joined channel
      */
-    function join(bytes32 channelId, uint256 index, Signature calldata sig)
+    function join(bytes32 channelId, uint256 index, bytes calldata sig)
         external returns (bytes32);
 
     /**
@@ -253,11 +248,13 @@ interface IChannel {
      * @param channelId Unique identifier for the channel
      * @param candidate The state being submitted as the latest valid state
      * @param proofs Additional states required by the adjudicator
+     * @param challengerSig Signature of the challenger on the candidate state. Must be signed by one of the participants
      */
     function challenge(
         bytes32 channelId,
         State calldata candidate,
-        State[] calldata proofs
+        State[] calldata proofs,
+        bytes calldata challengerSig
     ) external;
 
     /**
@@ -284,25 +281,27 @@ interface IDeposit {
     /**
      * @notice Deposits tokens into the contract
      * @dev For native tokens, the value should be sent with the transaction
+     * @param wallet Address of the account whose ledger is changed
      * @param token Token address (use address(0) for native tokens)
      * @param amount Amount of tokens to deposit
      */
-    function deposit(address token, uint256 amount) external payable;
+    function deposit(address wallet, address token, uint256 amount) external payable;
 
     /**
      * @notice Withdraws tokens from the contract
      * @dev Can only withdraw available (not locked in channels) funds
+     * @param wallet Address of the account whose ledger is changed
      * @param token Token address (use address(0) for native tokens)
      * @param amount Amount of tokens to withdraw
      */
-    function withdraw(address token, uint256 amount) external;
+    function withdraw(address wallet, address token, uint256 amount) external;
 }
 ```
 
 ### Channel Lifecycle
 
-1. **Creation**: Creator constructs channel config and signs initial state with `StateIntent.INITIALIZE`
-2. **Joining**: Participants verify the channel and sign the same funding state
+1. **Creation**: Creator constructs channel config and signs initial state with `StateIntent.INITIALIZE`. Second participant are able to join a channel immediately by providing a signature over initial state, and funds will be deducted from their account, if available.
+2. **Joining**: Participants verify the channel and sign the same funding state. This step can be omitted by providing a signature over the initial state when creating the channel. Note, however, that this means that funds will be locked from the participant's balance, while `join(...)` allows to fund the channel from external account.
 3. **Active**: Once fully funded, the channel transitions to active state for off-chain operation
 4. **Off-chain Updates**: Participants exchange and sign state updates according to application logic
 5. **Resolution**:
@@ -456,7 +455,7 @@ No backward compatibility issues found. This ERC is designed to coexist with exi
 
 ### On-Chain Security
 
-- **Signature Verification**: All state transitions require valid signatures from participants. The protocol uses bare signatures (without EIP-191) for chain agnosticism.
+- **Signature Verification**: All state transitions require valid signatures from participants. The protocol supports signatures of all popular formats, including EIP-191 and EIP-712.
 - **Challenge Period**: The configurable challenge duration provides time for honest participants to respond to invalid states.
 - **Adjudicator Validation**: Custom adjudicators must be carefully audited as they control state transition rules.
 - **Reentrancy Protection**: Implementation should follow checks-effects-interactions pattern, especially in fund distribution.

docs/nitrolite_client/types.md

@@ -30,14 +30,10 @@ A hash of a channel state, represented as a hexadecimal string.
 ### Signature
 
 ```typescript
-interface Signature {
-  v: number;  // Recovery value
-  r: Hex;     // First 32 bytes of the signature
-  s: Hex;     // Second 32 bytes of the signature
-}
+type Signature = Hex;
 ```
 
-Represents a cryptographic signature used for signing state channel states.
+Represents a cryptographic signature used for signing state channel states as a hexadecimal string.
 
 ### Allocation
 
@@ -85,7 +81,7 @@ interface State {
   version: bigint;                     // Version number, incremented for each update
   data: Hex;                           // Application data encoded as hex
   allocations: [Allocation, Allocation]; // Asset allocation for each participant
-  sigs: Signature[];                   // State hash signatures
+  sigs: Signature[];                         // State hash signatures
 }
 ```
 

docs/quick_start/connect_to_the_clearnode.md

@@ -554,7 +554,7 @@ const messageSigner = async (payload: RequestData | ResponsePayload): Promise<He
 ```
 
 ## Getting Channel Information
-Так
+
 After authenticating with a ClearNode, you can request information about your channels. This is useful to verify your connection is working correctly and to retrieve channel data.
 
 ```javascript