solidity gringotts

[codchen]

Summary

Ports the CosmWasm Gringotts vesting contract to Solidity for deployment on Sei's EVM. Uses native SEI tokens and integrates directly with Sei's staking and distribution precompiles.

Key Features

• Native SEI Support: Works with native SEI tokens (not ERC20), sent via msg.value during deployment
• Sei Precompile Integration: Direct integration with Sei's staking (0x1005) and distribution (0x1007) precompiles
• Upgradeable Contract: UUPS proxy pattern with multi-sig admin approval for upgrades
• Migration Tooling: Scripts to export state from existing CosmWasm contracts and deploy Solidity equivalents

Changes

New Files:

• solidity/contracts/Gringotts.sol - Main upgradeable vesting contract
• solidity/contracts/GringottsFactory.sol - Factory for deploying proxy instances
• solidity/interfaces/IStaking.sol - Sei staking precompile interface
• solidity/interfaces/IDistribution.sol - Sei distribution precompile interface
• solidity/contracts/mocks/ - Mock contracts for testing
• solidity/scripts/migration/ - Migration scripts for CosmWasm → Solidity
• solidity/test/Gringotts.test.js - Test suite (15 passing)

Configuration:

• solidity/package.json - Hardhat project with dependencies
• solidity/hardhat.config.js - Compiler settings (0.8.24, viaIR, Sei networks)
• .gitignore - Added node_modules/ and **/cache

Upgrade Process

Contract upgrades require multi-sig admin approval:

1. Admin calls proposeUpgrade(newImplementation)
2. Other admins vote via voteProposal(proposalId)
3. Once threshold reached, admin calls processProposal(proposalId)

Migration from CosmWasm

Export existing contract state

node scripts/migration/export-cosmwasm.js sei1contract... --output export.json

Convert addresses (sei1... → 0x...)

seid q evm sei-addr sei1admin...

Deploy to Sei EVM

EXPORT_FILE=export.json npx hardhat run scripts/migration/deploy-from-export.js --network sei