Technical Documentation

CapSign Protocol

White Paper v1.0

A comprehensive technical overview of CapSign's smart contract architecture for compliant private securities, fund administration, and capital formation on Ethereum.

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CapSign Protocol White Paper Cover

Key Innovations

Diamond Standard (EIP-2535)
Modular smart contracts enabling protocol-wide upgrades without asset migration.
Account Abstraction (ERC-4337)
Gasless, passkey-authenticated wallets with institutional custody support.
Programmable Compliance
On-chain transfer restrictions, investor classification, and attestation-based identity.
Lot-Based Cost Tracking
Automatic FIFO/LIFO cost basis tracking for accurate tax reporting.
Hierarchical Ownership
Directed acyclic graph linking entities, wallets, tokens, and lots.
Real-time Financials
On-chain data powers instant balance sheets, P&L, and cash flow statements.

What's Inside

20 pages covering protocol architecture, security, and use cases

  1. 1. IntroductionProblem & Solution
  2. 2. BackgroundLot Model, Ownership Graph
  3. 3. ArchitectureDiamonds, Factories, Identity
  4. 4. Wallet ArchitecturePasskeys, Custody, ERC-4337
  5. 5. Token ArchitectureCompliance, Lots, Modules
  6. 6. Capital FormationOfferings, Funds, Escrow
  7. 7. Compliance FrameworkModules, Attestations
  8. 8. Security ConsiderationsKey Management, Access Control
  9. 9. GovernanceProtocol vs. Entity
  10. 10. Use CasesFunds, Companies, Private Credit
  11. 11. Application LayerSubgraph, Paymasters, SDK

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