Create task task-061

backlog/tasks/task-061 - Safe-Multisig-Integration-for-Collaborative-Transactions.md

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+---
+id: task-061
+title: Safe Multisig Integration for Collaborative Transactions
+status: To Do
+assignee: []
+created_date: '2026-01-02 16:08'
+labels:
+  - feature
+  - web3
+  - multisig
+  - safe
+  - governance
+dependencies:
+  - task-007
+priority: medium
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+Integrate Safe (Gnosis Safe) SDK to enable collaborative transaction building and signing through the canvas interface.
+
+## Overview
+Allow CryptID users to create, propose, and sign Safe multisig transactions visually on the canvas. Multiple signers can collaborate in real-time to approve transactions.
+
+## Dependencies
+- Requires task-007 (Web3 Wallet Linking) to be completed first
+- Users must link their Safe wallet or EOA that is a Safe signer
+
+## Technical Approach
+- Use Safe{Core} SDK for transaction building and signing
+- Create TransactionBuilderShape for visual tx composition
+- Use Safe Transaction Service API for proposal queue
+- Real-time signature collection via canvas collaboration
+
+## Features
+1. **Safe Linking** - Link Safe addresses (detect via ERC-1271)
+2. **TransactionBuilderShape** - Visual transaction composer
+3. **Signature Collection UI** - See who has signed, who is pending
+4. **Transaction Queue** - View pending transactions for linked Safes
+5. **Execution** - Execute transactions when threshold is met
+
+## Visual Transaction Builder Capabilities
+- Transfer ETH/tokens
+- Contract interactions (with ABI import)
+- Batch transactions
+- Scheduled transactions (via delay module)
+
+## Collaboration Features
+- Real-time signature status on canvas
+- Notifications when signatures are needed
+- Discussion threads on pending transactions
+
+## References
+- Safe{Core} SDK: https://docs.safe.global/sdk/overview
+- Safe Transaction Service API: https://docs.safe.global/core-api/transaction-service-overview
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+<!-- AC:BEGIN -->
+- [ ] #1 Install and configure Safe{Core} SDK
+- [ ] #2 Implement ERC-1271 signature verification for Safe linking
+- [ ] #3 Create TransactionBuilderShape for visual tx composition
+- [ ] #4 Build signature collection UI with real-time updates
+- [ ] #5 Display pending transaction queue for linked Safes
+- [ ] #6 Enable transaction execution when threshold is met
+- [ ] #7 Support basic transfer and contract interaction transactions
+<!-- AC:END -->