did:safe

The did:safe method is a decentralized identifier solution designed for smart contract wallets, specifically the Gnosis Safe multi-signature wallet system. This method enables shared ownership of digital identities by converting any instance of a Gnosis Safe smart contract into a DID, making it particularly useful for Decentralized Autonomous Organizations (DAOs) and other collective entities.

The method operates on any Ethereum Virtual Machine (EVM) compatible blockchain and integrates with the Ceramic Network for identity resolution. Its key innovation is the ability to represent complex multi-signature ownership structures as DIDs, where the contract's owners are mapped to controller DIDs in the resolved document. This creates a flexible system where both individual and organizational identities can be managed through smart contract governance.

A unique feature of did:safe is its ability to handle nested ownership structures - for example, when one Safe contract owns another Safe contract. This enables complex organizational hierarchies to be represented in the DID system. The method leverages Chain Agnostic Improvement Proposals (CAIP) for blockchain-agnostic addressing and uses Ceramic Network's infrastructure for maintaining the connection between blockchain accounts and their associated DIDs.

Key Technical Components:

1. DID Generation and Structure

   • Format: did:safe:<CAIP-10-Account-ID>
   • Example: did:safe:eip155:1:0xff6229bc3655cf0204e850b54397d3651f5198c4
   • Based on CAIP-10 standard for chain-agnostic account identification

2. Resolution Process

   • Extracts Account ID from the identifier
   • Looks up Safe contract owners on the specified blockchain
   • Converts owner accounts to CAIP-10 Account IDs
   • Uses Ceramic caip10-link doctype to resolve owner DIDs
   • Constructs DID document with controller references

3. Key Management and Security

   • Inherits security properties from underlying blockchain
   • Supports multi-signature control
   • Enables recursive key lookup for nested Safe contracts
   • Provides encryption capabilities to all Safe owners

4. Technology Stack

   • Smart Contracts: Gnosis Safe contract system
   • Blockchain: Any EVM-compatible chain
   • Identity Layer: Ceramic Network
   • Standards:
     • CAIP-10
     • W3C DID
     • EIP-155

5. Unique Features

   • Support for version-time resolution
   • Hierarchical ownership representation
   • Decentralized access control
   • Recursive encryption capabilities
   • Integration with existing smart contract infrastructure