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Introduction

Welcome to the Upside Developer Guides!

Here, you’ll find documentation, specifications, and tools designed to support seamless integration with Upside APIs and smart contracts.

  • Relayer API: Broadcast gasless batched ERC2771 meta-transactions for EVM Security Token.

  • EVM Security Token (v5.1): The latest version of Upside Security Token, which adds EIP-2612 permit support through a new Standards Extension, higher precision interest rates (100,000 bips = 1%), and swap deadlines bounded by a configurable maximum swap lifetime.

  • EVM Security Token (v5): Version of Upside Security Token, which supports ownership snapshots instead of balance snapshots. Dividends contract is replaced with Interest Accrual one which provides ability to manage and distribute interest payments to token holders based on their token ownership over specific time periods.

  • EVM Security Token (v4): Version of Upside Security Token, which adds support for ERC2771 meta-transactions, automatic continuous snapshotting for dividends, and lazy minting.

  • EVM Security Token (v3): Upside Security Token, based on ERC20 and ERC1400 standards.

  • Recallable Payment: Standalone ERC-20 distributor for arbitrary, non pro-rata payments whose unclaimed allocations can be reclaimed by an admin. Independent of the EVM Security Token version — it operates against CMS v2 and up, is deployable from the Upside platform on v4 and up, and has its own AccessControl and its own security audit.

  • Solana RWA: Solana implementation of Upside RWA, based on SPL Token and Token-2022 standards.