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feat(tests): tests for ecrecover precompile (#1685)
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‎docs/CHANGELOG.md‎

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@@ -27,6 +27,7 @@ Test fixtures for use by clients are available for each release on the [Github r
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- ✨ Expand EIP-6110 modified contract tests, where the extra event log has no topics at all ([#1693](https://github.com/ethereum/execution-specs/pull/1693)).
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- ✨ Add a CREATE/2 test cases for when it runs OOG on code deposit ([#1705](https://github.com/ethereum/execution-specs/pull/1705)).
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- ✨ Expand cases to test *CALL opcodes causing OOG ([#1703](https://github.com/ethereum/execution-specs/pull/1703)).
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- ✨ Add `ecrecover` precompile tests originating form `evmone` unittests ([#1685](https://github.com/ethereum/execution-specs/pull/1685))
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## [v5.3.0](https://github.com/ethereum/execution-spec-tests/releases/tag/v5.3.0) - 2025-10-09
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‎tests/frontier/precompiles/test_ecrecover.py‎

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"""Tests ecrecover precompiled contract."""
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import pytest
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from execution_testing import (
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Account,
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Alloc,
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Environment,
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StateTestFiller,
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Transaction,
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)
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from execution_testing.forks.forks.forks import Byzantium
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from execution_testing.forks.helpers import Fork
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from execution_testing.vm import Opcodes as Op
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@pytest.mark.valid_from("Frontier")
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@pytest.mark.parametrize(
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"msg_hash, v, r, s, output",
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[
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pytest.param(
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bytes.fromhex(
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"18c547e4f7b0f325ad1e56f57e26c745b09a3e503d86e00e5255ff7f715d3d1c"
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),
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bytes.fromhex(
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"000000000000000000000000000000000000000000000000000000000000001c"
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),
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bytes.fromhex(
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"73b1693892219d736caba55bdb67216e485557ea6b6af75f37096c9aa6a5a75f"
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),
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bytes.fromhex(
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"eeb940b1d03b21e36b0e47e79769f095fe2ab855bd91e3a38756b7d75a9c4549"
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),
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bytes.fromhex(
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"000000000000000000000000a94f5374fce5edbc8e2a8697c15331677e6ebf0b"
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),
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id="valid_signature_1",
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),
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pytest.param(
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bytes.fromhex(
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"18c547e4f7b0f325ad1e56f57e26c745b09a3e503d86e00e5255ff7f715d3d1c"
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),
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bytes.fromhex(
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"000000000000000000000000000000000000000000000000000000000000001b"
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),
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bytes.fromhex(
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"7af9e73057870458f03c143483bc5fcb6f39d01c9b26d28ed9f3fe23714f6628"
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),
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bytes.fromhex(
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"3134a4ba8fafe11b351a720538398a5635e235c0b3258dce19942000731079ec"
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),
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bytes.fromhex(
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"0000000000000000000000009a04aede774152f135315670f562c19c5726df2c"
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),
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id="valid_signature_2",
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),
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# z >= Order
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pytest.param(
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bytes.fromhex(
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"fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141"
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),
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bytes.fromhex(
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"000000000000000000000000000000000000000000000000000000000000001b"
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),
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bytes.fromhex(
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"7af9e73057870458f03c143483bc5fcb6f39d01c9b26d28ed9f3fe23714f6628"
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),
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bytes.fromhex(
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"3134a4ba8fafe11b351a720538398a5635e235c0b3258dce19942000731079ec"
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),
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bytes.fromhex(
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"000000000000000000000000b32cf3c8616537a28583fc00d29a3e8c9614cd61"
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),
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id="z_gte_order",
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),
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pytest.param(
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bytes.fromhex(
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"6b8d2c81b11b2d699528dde488dbdf2f94293d0d33c32e347f255fa4a6c1f0a9"
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),
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bytes.fromhex(
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"000000000000000000000000000000000000000000000000000000000000001b"
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),
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bytes.fromhex(
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"79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798"
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),
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bytes.fromhex(
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"6b8d2c81b11b2d699528dde488dbdf2f94293d0d33c32e347f255fa4a6c1f0a9"
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),
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b"",
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id="invalid_signature_1",
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),
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pytest.param(
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bytes.fromhex(
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"18c547e4f7b0f325ad1e56f57e26c745b09a3e503d86e00e5255ff7f715d3d1c"
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),
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bytes.fromhex(
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"000000000000000000000000000000000000000000000000000000000000001c"
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),
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bytes.fromhex(
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"0000000000000000000000000000000000000000000000000000000000000000"
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),
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bytes.fromhex(
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"eeb940b1d03b21e36b0e47e79769f095fe2ab855bd91e3a38756b7d75a9c4549"
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),
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b"",
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id="invalid_signature_2",
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),
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pytest.param(
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bytes.fromhex(
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"18c547e4f7b0f325ad1e56f57e26c745b09a3e503d86e00e5255ff7f715d3d1c"
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),
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bytes.fromhex(
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"000000000000000000000000000000000000000000000000000000000000001c"
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),
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bytes.fromhex(
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"73b1693892219d736caba55bdb67216e485557ea6b6af75f37096c9aa6a5a75f"
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),
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bytes.fromhex(
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"0000000000000000000000000000000000000000000000000000000000000000"
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),
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b"",
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id="invalid_signature_3",
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),
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# r >= Order
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pytest.param(
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bytes.fromhex(
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"18c547e4f7b0f325ad1e56f57e26c745b09a3e503d86e00e5255ff7f715d3d1c"
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),
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bytes.fromhex(
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"000000000000000000000000000000000000000000000000000000000000001c"
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),
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bytes.fromhex(
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"fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141"
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),
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bytes.fromhex(
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"eeb940b1d03b21e36b0e47e79769f095fe2ab855bd91e3a38756b7d75a9c4549"
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),
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b"",
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id="invalid_signature_3",
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),
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# s >= Order
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pytest.param(
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bytes.fromhex(
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"18c547e4f7b0f325ad1e56f57e26c745b09a3e503d86e00e5255ff7f715d3d1c"
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),
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bytes.fromhex(
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"000000000000000000000000000000000000000000000000000000000000001c"
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),
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bytes.fromhex(
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"73b1693892219d736caba55bdb67216e485557ea6b6af75f37096c9aa6a5a75f"
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),
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bytes.fromhex(
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"fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141"
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),
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b"",
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id="s_gte_order",
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),
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# u1 == u2 && R == G
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pytest.param(
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bytes.fromhex(
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"c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470"
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),
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bytes.fromhex(
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"000000000000000000000000000000000000000000000000000000000000001b"
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),
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bytes.fromhex(
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"79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798"
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),
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bytes.fromhex(
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"3a2db9fe7908dcc36d81824d2338fc3dd5ae2692e4c6790043d7868872b09cd1"
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),
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bytes.fromhex(
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"0000000000000000000000002e4db28b1f03ec8acfc2865e0c08308730e7ddf2"
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),
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id="u1_eq_u2_R_eq_G",
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),
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# u1 == -u2 && R == -G
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pytest.param(
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bytes.fromhex(
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"c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470"
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),
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bytes.fromhex(
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"000000000000000000000000000000000000000000000000000000000000001c"
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),
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bytes.fromhex(
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"79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798"
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),
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bytes.fromhex(
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"c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470"
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),
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bytes.fromhex(
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"0000000000000000000000002e4db28b1f03ec8acfc2865e0c08308730e7ddf2"
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),
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id="u1_eq_neg_u2_R_eq_neg_G",
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),
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# 13u1 == u2 && R == -13G
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pytest.param(
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bytes.fromhex(
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"c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470"
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),
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bytes.fromhex(
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"000000000000000000000000000000000000000000000000000000000000001b"
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),
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bytes.fromhex(
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"f28773c2d975288bc7d1d205c3748651b075fbc6610e58cddeeddf8f19405aa8"
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),
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bytes.fromhex(
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"533e9827446324ac92450a05ef04622bc0081f8d5b394e4d7b514ed35c946ee9"
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),
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b"",
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id="13u1_eq_u2_R_eq_neg_13G",
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),
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# 13u1 == u2 && R == 13G
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pytest.param(
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bytes.fromhex(
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"c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470"
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),
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bytes.fromhex(
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"000000000000000000000000000000000000000000000000000000000000001c"
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),
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bytes.fromhex(
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"f28773c2d975288bc7d1d205c3748651b075fbc6610e58cddeeddf8f19405aa8"
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),
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bytes.fromhex(
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"533e9827446324ac92450a05ef04622bc0081f8d5b394e4d7b514ed35c946ee9"
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),
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bytes.fromhex(
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"000000000000000000000000fc4b7e97f115ac81f9a6997254892b45e8159d46"
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),
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id="13u1_eq_u2_R_eq_13G",
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),
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],
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)
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def test_precompiles(
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state_test: StateTestFiller,
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pre: Alloc,
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fork: Fork,
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msg_hash: bytes,
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v: bytes,
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r: bytes,
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s: bytes,
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output: bytes,
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) -> None:
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"""
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Tests the behavior of `ecrecover` precompiled contract.
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"""
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env = Environment()
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# Memory
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hash_offset = 0
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v_offset = 32
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r_offset = 64
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s_offset = 96
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ret_offset = 128
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account = pre.deploy_contract(
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Op.MSTORE(hash_offset, msg_hash)
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+ Op.MSTORE(v_offset, v)
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+ Op.MSTORE(r_offset, r)
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+ Op.MSTORE(s_offset, s)
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+ Op.CALL(
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gas=50_000,
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address="0x01", # ecrecover precompile address
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args_offset=hash_offset,
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args_size=4 * 32,
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ret_offset=ret_offset,
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ret_size=32,
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)
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+ Op.SSTORE(0, Op.MLOAD(ret_offset))
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+ Op.STOP,
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storage={0: 0xDEADBEEF},
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)
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tx = Transaction(
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to=account,
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sender=pre.fund_eoa(),
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gas_limit=1_000_000,
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protected=fork >= Byzantium,
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)
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post = {account: Account(storage={0: output})}
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state_test(env=env, pre=pre, post=post, tx=tx)

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