Deposit

Deposit adds collateral to a position. Collateral backs the loan: the more you deposit, the more can be borrowed against it - by you (up to 50% LTV) and by Sonnar on your behalf (up to the target LTV).

What the method does

On-chain, deposit transfers the collateral from your wallet and supplies it to the position’s lender:

• The position’s stored lender (Jupiter Lend or Kamino Lend) decides which supply flow runs - callers never pick a market.
• On Kamino the collateral is supplied to the reserve and pledged to your obligation; on Jupiter Lend it’s added to your lending position.
• Depositing never borrows anything by itself. It lowers your LTV and raises your borrowing capacity.
• For SOL, the deposit is made as wSOL - the SDK inserts the wrap instructions automatically.

A deposit is also how Sonnar gets more room to work: on its next poll after your deposit, the engine sees the fresh idle borrowing power and deploys it.

How to call it

For an existing position, use executeAction with action: "deposit":

import { executeAction, parseCollateral, CBBTC_MINT } from "@hobba-io/core";

const { signature, lender } = await executeAction({
  connection,
  signer,
  collateralMint: CBBTC_MINT,
  action: "deposit",
  amount: parseCollateral("0.005", CBBTC_MINT),  // collateral base units
  apiBaseUrl: "https://app.hobba.io",
  onStep: (s) => setStatus(s),
});

For a first-time deposit (no position yet), use executeDepositBorrow - it bundles the one-time position initialization; with borrowAmount: new BN(0) it’s a pure deposit.

Bounds

Fetch them with getLimits rather than hardcoding:

Limit	Field	Rule
Minimum deposit	minDeposit	1 SOL / 0.001 cbBTC first time; 0.1 SOL / 0.0001 cbBTC top-up
SOL “Max” reserve	solReserve	lamports held back from a max deposit for rent + fees
Rounding buffer	depositBuffer	tiny shave applied on Jupiter Lend deposits

The wallet must be allowlisted - a one-time, per-wallet step.

After it lands

• Your LTV drops immediately; getPosition().collateral reflects the new balance.
• Sonnar tops the position back up toward target LTV, so the newly idle borrowing power starts earning within the next rebalance cycle.
• Adding collateral is also the fastest way to de-risk a position that has drifted toward the liquidation line.