Smart Contracts

Technical documentation for the Solana Index Fund smart contracts.

Contract Overview

The Solana Index Fund protocol is built on a set of smart contracts deployed on the Solana blockchain. These contracts handle various aspects of the protocol, including token management, index calculation, rebalancing, treasury operations, and more.

Security

All Solana Index Fund smart contracts have been audited by independent security firms. Audit reports are available in the Audits section.

Contract Addresses

The following are the addresses of the main Solana Index Fund smart contracts on the Solana blockchain:

Contract	Address	Description
INDEX Token	`index1111111111111111111111111111111111111`	The main INDEX token contract
SINDEX Token	`sindex111111111111111111111111111111111111`	The SINDEX token contract
MINDEX Token	`mindex111111111111111111111111111111111111`	The MINDEX token contract
DINDEX Token	`dindex111111111111111111111111111111111111`	The DINDEX token contract
NINDEX Token	`nindex111111111111111111111111111111111111`	The NINDEX token contract
Treasury	`treasury1111111111111111111111111111111111`	The treasury contract
Rebalancer	`rebalancer11111111111111111111111111111111`	The rebalancing contract
Staking	`staking11111111111111111111111111111111111`	The staking contract

Contract Architecture

The Solana Index Fund smart contracts follow a modular architecture with clear separation of concerns:

Token Contracts

The token contracts implement the SPL Token standard and include additional functionality specific to the Solana Index Fund protocol:

Mint Authority - Controlled by the treasury contract for minting new tokens
Burn Authority - Controlled by the treasury contract for burning tokens
Transfer Authority - Standard SPL token transfer functionality
Metadata - Token metadata including name, symbol, and decimals

Each index token (INDEX, SINDEX, MINDEX, DINDEX, NINDEX) has its own token contract with the same structure. The staked versions of these tokens (st_INDEX, st_SINDEX, etc.) are also implemented as separate token contracts.

Contract Interactions

The Solana Index Fund smart contracts interact with each other in various ways:

Treasury → Token Contracts - The treasury contract interacts with token contracts to mint and burn tokens
Rebalancer → Treasury - The rebalancer contract interacts with the treasury contract to execute trades during rebalancing
Staking → Token Contracts - The staking contract interacts with token contracts to handle staking and unstaking
Treasury → Staking - The treasury contract interacts with the staking contract to distribute rewards

Contract Security

The Solana Index Fund smart contracts implement various security measures:

Role-Based Access Control - Different operations require different permissions
Multi-Signature Wallet - Critical operations require approval from multiple authorized signers
Emergency Pause - Contracts can be paused in case of emergency
Rate Limiting - Certain operations are rate-limited to prevent abuse
Input Validation - All inputs are validated to prevent unexpected behavior

Contract Upgradability

The Solana Index Fund smart contracts are designed to be upgradable to allow for future improvements and bug fixes. The upgrade process is as follows:

A new version of the contract is deployed
The upgrade proposal is submitted to the governance system
Token holders vote on the upgrade proposal
If approved, the upgrade is executed by the upgrade authority
The old contract is deprecated and the new contract takes over

The upgrade authority is a multi-signature wallet requiring approval from multiple authorized signers. This ensures that no single entity can upgrade the contracts without consensus.