> ## Documentation Index
> Fetch the complete documentation index at: https://docs-staging.centuari.finance/llms.txt
> Use this file to discover all available pages before exploring further.

# Supply Capital

> Detailed guide to supplying capital for fixed-rate lending

## Overview

This guide covers the mechanics of supplying capital to Centuari, from placing orders to managing active positions.

## Placing a Lend Order

### Easy Mode

<Steps>
  <Step title="Select Asset & Amount">
    Choose stablecoin and enter amount
  </Step>

  <Step title="Review Terms">
    System shows:

    * Estimated rate
    * Estimated maturity
    * Auto rollover status
  </Step>

  <Step title="Confirm">
    One-click to submit order
  </Step>
</Steps>

### Advanced Mode

<Steps>
  <Step title="Select Asset & Amount">
    Choose stablecoin and enter amount
  </Step>

  <Step title="Set Your Rate">
    Enter desired APY (e.g., 8.5%)

    <Info>
      Higher rates = longer wait for match. Check order book for current market.
    </Info>
  </Step>

  <Step title="Choose Maturity">
    Select from:

    * Predetermined maturity dates (1st of each month, up to 3 active dates)
  </Step>

  <Step title="Configure Auto Features">
    Toggle auto rollover on/off
  </Step>

  <Step title="Confirm">
    Submit order to book
  </Step>
</Steps>

## Order States

| State            | Description                       |
| ---------------- | --------------------------------- |
| Pending          | Order in book, waiting for match  |
| Partially Filled | Some amount matched, rest waiting |
| Matched          | Fully matched, position active    |
| Cancelled        | User cancelled before match       |
| Expired          | Time-limited order expired        |

## Order Book Mechanics

### Price-Time Priority

Orders match based on:

1. **Best rate first**: Orders offering better rates match first
2. **Time priority**: Among equal rates, earlier orders match first

### Example

```
Your order: Lend 10,000 USDC at 8.0% maturing June 1

Order Book (Borrow orders):
  1. 5,000 USDC at 7.5% ← Won't match (below your rate)
  2. 8,000 USDC at 8.0% ← Matches (you get 8,000)
  3. 5,000 USDC at 8.2% ← Matches (you get remaining 2,000)

Result: Fully matched at blended ~8.04% APY
```

## Partial Fills

Large orders may match with multiple counterparties:

```
Your order: 100,000 USDC at 8.0%

Matches:
  - 30,000 USDC matched immediately
  - 70,000 USDC remains in order book

You receive:
  - CBT for the 30,000 matched portion
  - Order continues for remaining 70,000
```

## Managing Pending Orders

### View Orders

Dashboard shows all pending orders with:

* Amount and rate
* Time in queue
* Estimated fill time

### Modify Orders

Before matching, you can:

* **Change rate**: Adjust up or down
* **Change amount**: Increase or decrease
* **Cancel**: Remove from book entirely

### Cancel Orders

Cancellation is:

* **Free**: No gas or protocol fees
* **Instant**: Funds available immediately
* **Partial**: Can cancel portion of order

## Active Positions

Once matched, your position shows:

| Field            | Description                 |
| ---------------- | --------------------------- |
| Position ID      | Unique identifier           |
| Amount           | Principal lent              |
| Rate             | Your fixed APY              |
| Maturity         | When position matures       |
| CBT Balance      | Your CBT tokens             |
| Current Value    | CBT × current price         |
| Accrued Interest | Interest earned to date     |
| Projected Return | Expected return at maturity |

## CBT Mechanics

### Purchase Price

CBT is purchased at a discount:

```
CBT Price = 1 / (1 + Rate × Time)

Example: 8% APY for 1 year
CBT Price = 1 / (1 + 0.08 × 1) = 0.9259
Lend $10,000 → Receive 10,800 CBT
At maturity: 10,800 CBT × $1 = $10,800
```

### Price Convergence

CBT price increases as maturity approaches:

```
Day 0:   CBT = $0.926 (lend day)
Day 90:  CBT = $0.943
Day 180: CBT = $0.962
Day 270: CBT = $0.981
Day 365: CBT = $1.000 (maturity)
```

## Cross-Chain Deposits

Deposit from any supported chain:

<Steps>
  <Step title="Select Source Chain">
    Choose your current chain (Ethereum, Polygon, etc.)
  </Step>

  <Step title="Enter Amount">
    Specify amount to lend
  </Step>

  <Step title="Approve & Sign">
    Sign cross-chain transaction
  </Step>

  <Step title="Wait for Bridge">
    Assets bridge to Arbitrum (usually 10-30 minutes)
  </Step>

  <Step title="Order Placed">
    Your lend order is placed on Arbitrum
  </Step>
</Steps>

## Idle Yield Router (Idle Capital)

While your order waits for a match:

1. After brief delay (\~5 min), capital deployed to yield protocols
2. Earns interim yield (Aave, Compound, etc.)
3. Instantly recalled when order matches
4. You keep all interim yield

<Card title="Idle Yield Router Details" icon="route" href="/products/yield-router/overview">
  Learn more about capital efficiency
</Card>

## Best Practices

<CardGroup cols={2}>
  <Card title="Check Market Rates" icon="chart-line">
    Review order book before setting your rate
  </Card>

  <Card title="Consider Maturity Needs" icon="calendar">
    Choose maturity based on when you'll need funds
  </Card>

  <Card title="Use Rate Laddering" icon="stairs">
    Split across multiple rates for faster fills
  </Card>

  <Card title="Monitor Positions" icon="eye">
    Track upcoming maturities and plan accordingly
  </Card>
</CardGroup>

## FAQs

<AccordionGroup>
  <Accordion title="Why is my order not matching?">
    Your rate may be above current market. Check the order book and consider lowering your rate or using Easy Mode.
  </Accordion>

  <Accordion title="Can I add to an existing position?">
    Each lend order creates a separate position. You can have multiple positions at different rates/maturities.
  </Accordion>

  <Accordion title="What happens if borrower defaults?">
    Borrowers are overcollateralized. If collateral drops, they're liquidated, your position is unaffected.
  </Accordion>
</AccordionGroup>