Account Abstraction UserOp Simulator

Test UserOperations in a sandboxed, local environment that mirrors mainnet conditions. Eliminate flaky tests and unpredictable gas costs by simulating exact bundler and paymaster behavior.

Verify compatibility across major ERC-4337 bundlers (like Stackup, Alchemy) and custom paymaster logic. Catch integration failures and sponsorship rule violations early in your dev cycle.

Receive precise preVerification and verification gas estimates for your UserOps. Identify and refactor inefficient patterns in your Account logic to minimize costs for end-users.

Automatically test for common ERC-4337 vulnerabilities like signature replay, paymaster griefing, and storage collisions. Our rule set is informed by audits of live smart accounts.

Embed simulation directly into your GitHub Actions, CircleCI, or Jenkins workflows. Automate UserOp validation on every pull request to enforce quality gates and prevent regressions.

Model complex, stateful user journeys—like batched transactions, social recovery flows, or session keys—to ensure your smart account behaves correctly under real-world conditions.

Pre-execute and validate every UserOp before it hits the blockchain. We prevent failed transactions and wasted gas fees, protecting your users' funds and improving their experience.

Simulate complex multi-step operations to uncover security vulnerabilities before deployment. Our system tests against reentrancy, logic errors, and state inconsistencies specific to Account Abstraction.

Integrate a production-ready simulator to bypass weeks of in-house development. Test new paymasters, signature schemes, and bundler logic with confidence and speed.

Validate that your sponsored transaction logic works under real network conditions. Simulate gas price spikes and token price volatility to guarantee your subsidy model remains solvent.

Test your custom bundler logic against edge cases and high-load scenarios before mainnet deployment. Ensure mempool management and operation ordering perform as expected.

Provide users with a seamless, predictable experience. By eliminating transaction failures and unexpected reverts, you build the reliability required for mainstream adoption.

We conduct a technical deep-dive to define your simulator's scope, target chains (Ethereum, Polygon, Arbitrum, etc.), and required validation logic. Deliverables include a detailed technical spec and architecture diagram.

Our engineers build the core simulation engine in TypeScript/Go, implementing ERC-4337 Bundler RPC methods (eth_sendUserOperation, eth_estimateUserOperationGas) with support for custom paymasters and signature schemes.

We integrate your specific validation rules, deploy mock contracts for testing, and implement hooks for your existing wallet or dApp stack. Includes a staging environment for your team.

The codebase undergoes internal security review focusing on gas estimation accuracy and validation logic. We perform gas optimization and finalize comprehensive documentation.

We deploy the simulator to your production infrastructure (AWS/GCP/Azure) with monitoring (Prometheus/Grafana) and provide a knowledge transfer session for your engineering team.

Post-launch, we offer optional support packages with SLAs for updates, maintenance, and assistance with new ERC-4337 standards or chain integrations as they emerge.