# Sandbank Service Guide Book
This book is made to help Sandbank clients better understand Sandbank Service
> ### **Sandbank values trust the most.**
>
> ### **We believe trust comes from transparency.**
>
> ### **So, we explain what, how, why sandbank service works for you.**
### **What is Sandbank?**
Sandbank is a crypto-backed loan and investment service. Sandbank leverages customer credit and cryptocurrency collateral to connect funding needs with individual and institutional investors. Borrowers can keep their cryptoasset while getting an instant loan. Lenders can invest their assets and earn middle rate passive income which is secure under the protection of the Sandbank collateral management system. Sandbank is opening the era of crypto and real merged economy, allowing everyone to spend and invest freely and routinely in the real world with the crypto-backed loan.
### 📌 Before you start
| | **BTC** | **USDT(ERC20)** | ETH | XRP |
| :----------------: | :---------: | :-------------------------------------------------------------------: | --------- | --- |
| Minimum Withdrawal | B **0.001** | **$ 10** | **0.02** | 1 |
| Withdrawal Fee | **0.0001** |
|
| **ETH** | **0.02** | **0.005** |
| XRP | 1 | 1 |
| | | |
## **How to Deposit**
1. Click `Token Management` page on the left navigation bar
2. Choose which crypto you want to deposit
3. Click \[**Create Address]** to create a deposit address.
4. Send crypto to this deposit address
That’s it. Now you have your personal address in Sandbank and you can deposit crypto at this address. **BTC** will be credited to your account after **1 confirmation** and after **6 confirmations** are made, an equivalent amount is available for withdrawals. **USDT(ERC-20)** will be credited into your account after **12 confirmations** and available for withdrawals as well.
## **How to Withdraw**
1. Click `Token Management` page
2. Choose which crypto you want to withdraw
3. Type **to address, amount** you want to transfer
4. Pass OTP security
{% hint style="danger" %}
**CAUTION**: once a transaction is broadcasted on a blockchain, it's irreversible. So, please check again what you type in **\[to address]** and **\[amount]**
{% endhint %}
## **Deposit & Withdrawal Halt**
Under the situations of site error, the threat of cyber attack, crypto forking, unstable blockchain network, Sandbank can halt the crypto deposit or withdrawal.
## **Custody**
Your digital assets are stored securely in **Octet Wallet**.
**Octet Wallet** is the most secure and easy-to-use wallet solution for digital assets. The keys to access the deposit in the wallet are stored separately, and through this, even if some of them are lost, they can be recovered. In addition, some keys are kept securely in an environment where network access is completely blocked. **Hexlant**, which provides **Octet Wallet**, is a company founded by the top blockchain experts in Korea.
# Invest
## Available Crypto
* BTC
* USDT (ERC-20)
* ETH
* XRP
## Investment Products Overview
## How to Invest
1. Deposit crypto to invest in Sandbank account
2. Click `INVESTMENT` page on the navigation bar
3. Choose which products to invest
4. Read details of the product
5. Type how much to invest
6. Click **'REQUEST'**
7. Confirm your request and check the term.
8. Click **'Submit'**
After a quick investment request examination, your investment would be approved by Sandbank.
## Interest
All the interest rates are compounding basis. So, you can earn interest on interest and on. The interests are credited into your account every day on the night after your investment is approved.