chore:rename verifying singelton paymaster to sponsorship paymaster a…

…nd also only keep v2 (overwrite v1.1.0)

.env.example

@@ -10,6 +10,7 @@ PAYMASTER_OWNER_ADDRESS_DEV=
 PAYMASTER_OWNER_ADDRESS_PROD=
 PAYMASTER_SIGNER_ADDRESS_DEV=
 PAYMASTER_SIGNER_ADDRESS_PROD=
+SPONSORSHIP_FEE_COLLECTOR_ADDRESS_PROD=
 TOKEN_PAYMASTER_OWNER_ADDRESS_DEV=
 TOKEN_PAYMASTER_OWNER_ADDRESS_PROD=
 TOKEN_PAYMASTER_SIGNER_ADDRESS_DEV=

README.md

@@ -3,7 +3,7 @@
 ### Playground for ERC4337 Paymasters built with :heart_eyes: by Biconomy 
 #### Some examples 
 
-1. Singleton Verifying Paymaster: Acts as a sponsorship paymaster and lets Dapps manage deposit without deploying a new one for each Dapp.
+1. Sponsorship Paymaster: Acts as a sponsorship paymaster and lets Dapps manage deposit without deploying a new one for each Dapp.
 
 2. Token Paymaster: Extended version of Verifying Paymaster which can accept fees from user by withdrawing ERC20 tokens
 

contracts/common/Errors.sol

@@ -9,7 +9,7 @@ contract BasePaymasterErrors {
     error CallerIsNotAnEntryPoint(address caller);
 }
 
-contract VerifyingPaymasterErrors {
+contract SponsorshipPaymasterErrors {
     /**
      * @notice Throws when the Entrypoint address provided is address(0)
      */

contracts/interfaces/paymasters/IVerifyingSingletonPaymaster.sol → contracts/interfaces/paymasters/ISponsorshipPaymaster.sol

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: MIT
 pragma solidity ^0.8.20;
 
-interface IVerifyingSingletonPaymaster {
+interface ISponsorshipPaymaster {
     event EPGasOverheadChanged(
         uint256 indexed _oldValue,
         uint256 indexed _newValue

contracts/verifying/VerifyingSingletonPaymasterV2.sol → contracts/sponsorship/SponsorshipPaymaster.sol

@@ -7,15 +7,26 @@ import {ECDSA} from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
 import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
 import {UserOperation, UserOperationLib} from "@account-abstraction/contracts/interfaces/UserOperation.sol";
 import "../BasePaymaster.sol";
-import {VerifyingPaymasterErrors} from "../common/Errors.sol";
+import {SponsorshipPaymasterErrors} from "../common/Errors.sol";
 import {MathLib} from "../libs/MathLib.sol";
-import {IVerifyingSingletonPaymaster} from "../interfaces/paymasters/IVerifyingSingletonPaymaster.sol";
-
-contract VerifyingSingletonPaymasterV2 is
+import {ISponsorshipPaymaster} from "../interfaces/paymasters/ISponsorshipPaymaster.sol";
+
+/**
+ * @title SponsorshipPaymaster
+ * @author livingrockrises<[email protected]>
+ * @notice Based on Infinitism 'VerifyingPaymaster' contract
+ * @dev This contract is used to sponsor the transaction fees of the user operations
+ * Uses a verifying signer to provide the signature if predetermined conditions are met 
+ * regarding the user operation calldata. Also this paymaster is Singleton in nature which 
+ * means multiple Dapps/Wallet clients willing to sponsor the transactions can share this paymaster.
+ * Maintains it's own accounting of the gas balance for each Dapp/Wallet client 
+ * and Manages it's own deposit on the EntryPoint.
+ */
+contract SponsorshipPaymaster is
     BasePaymaster,
     ReentrancyGuard,
-    VerifyingPaymasterErrors,
-    IVerifyingSingletonPaymaster
+    SponsorshipPaymasterErrors,
+    ISponsorshipPaymaster
 {
     using ECDSA for bytes32;
     using UserOperationLib for UserOperation;