Proposal: Canton Privy SDK

Development Fund Proposal Submission

Proposal file:
/proposals/2026-09-Fairmint-canton-privy-sdk.md

Applicant

Organization:
Fairmint, Inc.

Author / Primary Contact:
Fairmint (@bbznyc)

Champion:
IntellectEU. Confirmed individual: Jonathan Mayeur (@jonathan-ieu).

---

Proposal Classification

Proposal Type:

• RFP-aligned proposal
• Individual initiative

RFP / Roadmap Area:
RFP-14 Wallet and dApp Integration tooling (Developer Experience, Tooling and Education). Also serves RFP-26 Key Management and Signing Controls.

Label:
wallet-apps

---

Funding & Timeline

Total Funding Request:
3,500,000 CC

Project Duration:
12 months (build 4 months; adoption claim window to month 12)

Maximum Amount:
N/A

Maximum Duration:
N/A

---

Summary

Canton applications that already authenticate users with Privy have no shared, reviewed library for binding that Privy-held Ed25519 key to a Canton external party and signing prepared transactions. This proposal funds a public TypeScript SDK (browser-approved and policy-managed modes), a DevNet reference flow with published transaction references, integration documentation, and a Privy signing driver contributed upstream to canton-network/wallet. 57% of the request pays only on verified independent MainNet integrators.

---

Submission Checklist

• Full proposal file is included in this PR
• Organization and primary contact identified
• Champion identified or Needs Champion selected
• RFP / roadmap alignment identified, if applicable
• Total funding request provided
• Project duration provided
• Proposal is within any RFP maximum amount
• Proposal is within any RFP maximum duration
• Milestones and milestone funding are defined in the proposal
• Acceptance criteria are based on ecosystem value
• Architectural alignment is addressed