Grant Application: CoW Protocol Integration Quickstarts & Precision Parameter Reference

CoW Grants Program
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Project Name: CoW Integration Quickstarts & Precision Reference
Applicant: ILE Labs (ILE-Labs · GitHub)
Track: Track B (Targeted Long-Form)
Requested Funding: $12,000 USD (denominated in COW)
Timeline: 6 Weeks (2 Milestones)

1. Executive Summary

CoW Protocol’s developer onboarding currently faces parameter-level friction. Business Development reports that even sophisticated integration partners struggle with formatting order payloads, packing slippage, setting up ERC-20 approvals for gasless swaps, and resolving API error responses.

To address these specific bottlenecks, ILE Labs proposes a Targeted Track B Documentation & Quickstart Suite:

  1. The 10-Minute Quickstart (TypeScript & Rust): Runnable, step-by-step developer templates that guide integrators from zero to a successfully signed and submitted order on Sepolia, showing correct calculations for slippage, fees, and quoting.
  2. Precision Parameter Reference & Schema Guides: Dedicated reference pages covering order creation fields, type constraints (like slippage formatting), and ABI-level setup for relay approval patterns.
  3. Interactive Payload Calculator: A lightweight, client-side web utility allowing developers to input their order parameters and see the exact EIP-712 signing payload and cURL requests generated.

By focusing purely on clear, developer-centric code examples and parameter precision, we lower integration barriers and reduce technical support overhead for the CoW team.

2. Problem Statement & Value to CoW DAO

The current integration docs explain high-level concepts but lack implementation-level detail:

  • The Slippage Trap: Integrators struggle to figure out how to pack slippage into the buy/sell amount fields.
  • Approval Opaque Patterns: Guidance on configuring ABI-level token approvals for gasless relay swaps is fragmented.
  • Opaque API Errors: Generic error codes do not provide troubleshooting steps.

Our proposal addresses these issues directly, focusing on the high-friction areas identified by CoW BD to ensure developers can integrate the protocol in minutes rather than days.

3. Scope of Deliverables

We propose to build the following targeted assets from scratch, drawing on our experience developing Web3 developer tools:

Deliverable 1: The 10-Minute Quickstart (TS & Rust)

  • A public GitHub repository containing runnable node scripts and Rust binaries.
  • Step-by-step code showing:
    1. Fetching a quote (fast vs optimal).
    2. Formatting the order payload (deducting fees, applying slippage limits).
    3. Signing the order (EIP-712 signature generation).
    4. Submitting to the Order Book API on Sepolia.

Deliverable 2: Precision Parameter Tables & Guides

  • Order Creation Reference: A structured guide explaining every field in the Order Creation API, detailing data types, byte constraints, and validation rules.
  • ABI Approval Setup Guide: A reference showing how to set up token approvals using PreSignature or standard ERC-20 approval patterns for gasless swaps.
  • Error Code Reference: A lookup table mapping API error codes (e.g., InvalidSignature, FeeTooLow) to human-readable explanations and debugging steps.

Deliverable 3: Interactive Payload Calculator (Playground)

  • A simple, static HTML/JS page (hosted via GitHub Pages) that allows developers to paste their trade parameters and instantly verify the EIP-712 payload format and cURL command needed for API execution.

4. Milestones & Budget Breakdown

Total Budget: $12,000 USD (denominated in COW)
Timeline: 6 Weeks

Milestone 1: TS/Rust Quickstarts & Parameter Tables (3 Weeks - $6,000)

  • Deliverables:
    • Runnable quickstart repositories (cow-quickstart-ts and cow-quickstart-rs) on GitHub.
    • Restructured API parameter reference covering slippage packing and fee deduction calculations.
  • Acceptance Criteria:
    • An external developer can clone the repository, input their Sepolia RPC/private key, and execute a successful testnet trade in under 10 minutes.
    • All code is fully documented with inline comments.

Milestone 2: Approval Guides, Error Lookup & Playground (3 Weeks - $6,000)

  • Deliverables:
    • ABI-level approval guides and the Error Code Reference lookup table.
    • Interactive client-side Web Payload Calculator page.
  • Acceptance Criteria:
    • Guides cover both standard and gasless relay approval paths.
    • The Web calculator generates correct EIP-712 signing structures for input order parameters.
    • Uptime and accessibility of the GitHub Pages utility.

5. Coordination & Dev Overhead

  • Estimated Core Team Time: 3–4 hours total for review and alignment.
  • Sync Calls: 2 short calls (Kickoff, Final Review).
  • Dependencies: Public OpenAPI/Swagger specifications and current SDK documentation.

6. Team & Experience

We are an engineering collective specializing in Web3 developer tools, payment libraries, and infrastructure. Our members have contributed to:

  • lightning-payjoin-kit: An open-source Rust library for collaborative payment privacy.
  • Transaction simulation and verification tools for move-parallel execution.

We will write all CoW integration assets from scratch, adapting our experience in creating onboarding guides and developer tools to deliver clear, production-grade documentation.

Core Team:

  • Charles Emmanuel (Project Lead): GitHub / LinkedIn
  • Steven Hert (Blockchain Developer): GitHub
  • Onyekachukwu Nweke (Integration Engineer): GitHub
  • Ayomide Oladehinde (Technical Researcher): Portfolio

7. Post-Grant Sustainability & Phase 2 Vision

To ensure these resources remain active and do not suffer from post-grant abandonment, ILE Labs commits to:

  • Active Maintenance (12 Months): We will maintain the Quickstart repositories, updating dependency versions and keeping the parameter tables in sync with any future OpenAPI schema releases.
  • Phase 2 Expansion: Once the baseline onboarding assets are built, we plan to seek community feedback for a Phase 2 proposal. Potential items include:
    • Exposing the Web Payload Calculator as a standalone browser extension or SDK helper package.
    • Adding support for advanced EIP-1271 smart contract wallet signatures.
    • Expanding the quickstart repositories to other languages (such as Python and Go) based on partner demand.
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Thanks for your interest in COW Grants and for your submission.

We’ve decided (for now) to keep integration documentation as a core-team-owned function rather than scoping it to external contributors via the grants council. We’ve closed that workstream and aren’t taking on proposals against it right now, so we won’t be moving this one forward.