@solarpirate
To bypass transaction signature verification in testnet interactions using on-chain simulators:
Local node configuration – Run modified Geth/Besu clients with --rpc.allow-unprotected-txs to accept unsigned transactions.
Hardhat tricks – Exploit hardhat_impersonateAccount to spoof sender addresses without valid signatures.
ABI manipulation – Craft custom ABI interfaces omitting signature requirements for specific functions.
Gasless meta-transactions – Simulate relayers using testnet-specific forwarders like Biconomy’s testnet contracts.
Pre-signed payloads – Reuse valid signatures from testnet explorers (Etherscan) through debug_traceCall.
Key tools: Foundry’s forge simulate, Tenderly’s gasless simulation, and Anvil’s auto-impersonation. Always verify testnet contracts inherit OpenZeppelin’s unsafe modules for signature bypass. Caution: These methods only work on testnets with disabled EIP-155 enforcement. Never deploy simulation logic to mainnet.
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