> For the complete documentation index, see [llms.txt](https://docs.castle.finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.castle.finance/technical-guides/program.md). # Program Program Code Repository: Functions in the program are created by bundling one or more instructions into a transaction. This document will first explain what each instruction does on its own and then how they are bundled together into various user-facing functions in the SDK. ### Instructions #### Initialize Creates a new vault #### Deposit Exchanges reserve tokens for vault LP tokens #### Withdraw Exchanges vault LP tokens for reserve tokens #### Rebalance Calculates and stores the desired allocations to integrated lending markets based on the vault strategy type Also emits and anchor event containing the new allocations Required before any reconcile IX is called #### Refresh \[Jet | Port | Solend] Refreshes the reserves of the given lending reserve, which is required before any deposit or withdrawal Calculates the value of the vault held in the given lending reserve, denominated in the reserve token #### Consolidate Refresh Calculates the total value of the vault, denominated in the reserve token. This is required before any deposit or withdrawal from the vault #### Reconcile \[Jet | Port | Solend] Deposits and withdraws from the given lending market according to the allocations stored by the rebalance IX ### Functions #### Initialize IXs * Initialize #### Deposit IXs * (if reserve token is SOL) Wrap SOL into SPL token * (if doesn't exist already) Create account for LP token * Refresh * Deposit * (if reserve token is SOL) Close intermediate account created during wrapping #### Withdraw IXs * Refresh * (if withdraw amount is less than in vault reserves) Reconcile * (if doesn't exist already) Create account for reserve token * Withdraw * (if reserve token is SOL) Unwrap from SPL token to SOL #### Rebalance IXs * Refresh * Rebalance * Reconcile IXs