⚰️ remove code related to precomputed variants

As the precompute variant is discontinued by the secp256r1-verify library,
we can remove the code related to it.

src/WebAuthn256r1.sol

@@ -2,7 +2,6 @@
 pragma solidity >=0.8.19 <0.9.0;
 
 import { ECDSA256r1 } from "../lib/secp256r1-verify/src/ECDSA256r1.sol";
-import { ECDSA256r1Precompute } from "../lib/secp256r1-verify/src/ECDSA256r1Precompute.sol";
 import { WebAuthnBase } from "./WebAuthnBase.sol";
 
 /// @title WebAuthn256r1
@@ -32,27 +31,4 @@ contract WebAuthn256r1 is WebAuthnBase {
             return ECDSA256r1.verify(message, r, s, qx, qy);
         }
     }
-
-    /// @notice Verify ECDSA signature though WebAuthn on the secp256r1 curve using a precomputed table
-    function verify(
-        bytes1 authenticatorDataFlagMask,
-        bytes calldata authenticatorData,
-        bytes calldata clientData,
-        bytes calldata clientChallenge,
-        uint256 clientChallengeOffset,
-        uint256 r,
-        uint256 s,
-        address precomputedTable
-    )
-        external
-        returns (bool)
-    {
-        unchecked {
-            bytes32 message = generateMessage(
-                authenticatorDataFlagMask, authenticatorData, clientData, clientChallenge, clientChallengeOffset
-            );
-
-            return ECDSA256r1Precompute.verify(message, r, s, precomputedTable);
-        }
-    }
 }

test/WebAuthn256r1.t.sol

@@ -39,78 +39,3 @@ contract ContractTestVerify is Test {
         );
     }
 }
-
-contract ContractTestVerifyPrecomputation is Test {
-    WebAuthn256r1 internal implem;
-    // the address where the the precomputed table will live
-    address private precomputeAddress;
-
-    function setUp() external {
-        implem = new WebAuthn256r1();
-        precomputeAddress = vm.addr(42);
-    }
-
-    /// @notice precumpute a shamir table of 256 points for a given pubKey
-    /// @dev this function execute a JS package listed in the package.json file
-    /// @param qx the x coordinate of the public key
-    /// @param qy the y coordinate of the public key
-    /// @return precompute the precomputed table as a bytes
-    function _precomputeShamirTable(uint256 qx, uint256 qy) private returns (bytes memory precompute) {
-        // Precompute a 8 dimensional table for Shamir's trick from c0 and c1
-        // and return the table as a bytes
-        string[] memory inputs = new string[](4);
-        inputs[0] = "npx";
-        inputs[1] = "@0x90d2b2b7fb7599eebb6e7a32980857d8/secp256r1-computation";
-        inputs[2] = vm.toString(qx);
-        inputs[3] = vm.toString(qy);
-        precompute = vm.ffi(inputs);
-    }
-
-    /// @notice Modifier for generating the precomputed table and storing it in the precompiled contract
-    /// @dev Uses the `_precomputeShamirTable(<qx>,<qy>)` function to generate the precomputed table
-    modifier _preparePrecomputeTable(uint256 qx, uint256 qy) {
-        // generate the precomputed table
-        bytes memory precompute = _precomputeShamirTable(qx, qy);
-
-        // set the precomputed points as the bytecode of the target contract
-        vm.etch(precomputeAddress, precompute);
-
-        // run the test
-        _;
-
-        // unset the bytecode of the target contract
-        vm.etch(precomputeAddress, hex"00");
-    }
-
-    function test_VerifyPrecomput()
-        public
-        _preparePrecomputeTable(
-            114_874_632_398_302_156_264_159_990_279_427_641_021_947_882_640_101_801_130_664_833_947_273_521_181_002,
-            32_136_952_818_958_550_240_756_825_111_900_051_564_117_520_891_182_470_183_735_244_184_006_536_587_423
-        )
-    {
-        assertTrue(
-            implem.verify(
-                // authenticatorDataFlagMask
-                0x01,
-                // authenticatorData
-                hex"f8e4b678e1c62f7355266eaa4dc1148573440937063a46d848da1e25babbd20b010000004d",
-                // clientData
-                hex"7b2274797065223a22776562617574686e2e676574222c226368616c6c656e67"
-                hex"65223a224e546f2d3161424547526e78786a6d6b61544865687972444e583369"
-                hex"7a6c7169316f776d4f643955474a30222c226f726967696e223a226874747073"
-                hex"3a2f2f66726573682e6c65646765722e636f6d222c2263726f73734f726967696e223a66616c73657d",
-                // clientChallenge
-                hex"353a3ed5a0441919f1c639a46931de872ac3357de2ce5aa2d68c2639df54189d",
-                // clientChallengeOffset
-                0x24,
-                // r
-                45_847_212_378_479_006_099_766_816_358_861_726_414_873_720_355_505_495_069_909_394_794_949_093_093_607,
-                // s
-                55_835_259_151_215_769_394_881_684_156_457_977_412_783_812_617_123_006_733_908_193_526_332_337_539_398,
-                // address where the precompute table lives
-                precomputeAddress
-            )
-        );
-    }
-}