# Introduction

Cross-Chain Swaps in a Snap! Swap your assets in a safe, fast & cheap way on hieSwap.

<figure><img src="/files/9u8zGIIzY5e6nsXAyV5T" alt=""><figcaption></figcaption></figure>

Money never sleeps, it always flows to something more efficient. In early 2022, when the HieSwap founding team entered the DeFi field, they were surprised to find that cross-chain transactions were so cumbersome and inefficient.

So the team created HieSwap - to reduce the duration of blockchain cross-chain transactions to 3 seconds, which is the first time in the industry to shorten the duration of cross-chain transactions to the second level! This is a milestone breakthrough and another major infrastructure change in the DeFi industry after the Uniswap AMM mechanism, which will change the efficiency of cross-chain transactions and the future pattern.

Not only fast, HieSwap's original cross-chain technology only requires ultra-low handling fees, and safely allows your assets to freely circulate in each chain.

HieSwap, a cross-chain protocol invested by RosSwap Labs, HieSwap is officially connected to multiple public chains. At present, the protocol has realized cross-chain conversion among seven chains including FONChain, BNBChain, HECO, Ethereum, OKXChain, Polygon and TRON.

Through the HieSwap cross-chain protocol, users can complete asset transfers between different chains in an environment with low transaction fees and low slippage. It is reported that the transaction time on HieSwap can be completed within 3 seconds at the fastest, which is 15 times faster than the transaction time of other similar cross-chain solutions on the market.<br>

In addition, HieSwap's multi-chain stablecoin exchange has sufficient liquidity for each chain, which effectively reduces the risk of slippage for cross-chain users. In the future, it will access more aggregated transactions between chains, and will support Exchange tokens and give users multiple choices.

The HieSwap team believes that time is money in the DeFi world, and HieSwap hopes to provide millions of DeFi users with a better cross-chain experience in the future.


# Contact us

<figure><img src="/files/xaCggRuMOQ9slBPTyoTO" alt=""><figcaption></figcaption></figure>

Here you can find HieSwap's official social media channels and community listings.

If English is not your first language, we also have many non-English communities, and we look forward to your joining!

### 🐦Twitter

<https://twitter.com/HieSwap>

### 💬 Telegram

**Official Telegram Group:**&#x20;

* 📣Telegraph Exchange (Global)**(** [**https://t.me/hieswap**](https://t.me/hieswap)**)**&#x20;

{% hint style="danger" %}
The administrator will help you solve problems in the group, and will not chat with you privately.&#x20;

All those who take the initiative to chat with you privately are scams and will take away your wallet assets. .
{% endhint %}

{% hint style="danger" %}
The administrator's chat box has an administrator logo in the upper right corner.

Please do not share your private key or seed phrase with anyone, or fill out any forms! Otherwise, it will cause irreversible asset loss.
{% endhint %}


# Cross-chain principle

HieSwap is a decentralized trading platform deployed on multiple public chains (currently supports seven chains of FSC, BSC, Heco, Oec, TRON, Polygon and ETH). With the characteristics of security, low transaction fees, and fast speed, it integrates cross-chain and aggregate transactions, and is committed to allowing all users to enjoy ultra-low fees and low slippage to complete the exchange of assets between single chains or double chains.

<figure><img src="/files/SDNDkeQqFfU0rCaxCMoo" alt=""><figcaption></figcaption></figure>


# Choose us

### 1.Safety

This is the most basic guarantee. HieSwap has considered security guarantees from the beginning of its creation. Through unique technologies, users will not encounter security problems during use.

### 2. Super low cost

Saving costs for you is our hope. In HieSwap, you only need to pay a lower cross-chain fee to complete cross-chain transactions quickly and safely. Gas fee and target chain transaction fee will be charged by the corresponding chain.

### 3. Lightning fast

Fast, is our original intention and goal of creating this platform. In the ever-changing blockchain, time means efficiency and money. Through our original cross-chain technology, we have improved cross-chain transactions from more than 3 minutes to less than 9 seconds. Cross-chain transactions have since entered the second-level era.


# Our mission

<figure><img src="/files/M923LkMXORjkphMWvmHH" alt=""><figcaption></figcaption></figure>

DeFi innovation has brought new vitality to the blockchain, promoted the birth of decentralized exchanges (DEX), and has been recognized by users. However, the inconvenience and long time of cross-chain transactions bring a very bad experience to users. In the ever-changing blockchain market, time is money, because the long transaction time has brought huge economic losses to users.

HieSwap uses original technology to reduce blockchain cross-chain transactions from the previous few minutes to seconds, and the fastest can reach 3 seconds. It only charges low transaction fees for cross-chain transactions while ensuring security. This is for users Bring great convenience.

It is our mission to let users move assets freely, so that your money never sleeps.


# Audit Report

### Beosin Audit Report

[**Beosin**](#user-content-fn-1)[^1][ **right  HieSwap**](https://beosin.com/audits/HIESWAP_202302151045.pdf)

**Polygon, Ethereum, Heco, OKExChain, BNB Chain, FonChain, TRON**

Audit report of the above public chain deployment contract

{% embed url="<https://files.gitbook.com/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F205Y40rYSgiD4DroYmGJ%2Fuploads%2F8ssagUEpEvOieSPLbDwR%2F202302151045.pdf?alt=media&token=3f50f54d-0f9c-4c1b-a5c5-60d4a99ad39a>" %}

[^1]:


# Play HieSwap

### Login to the official website

Login to HieSwap  [https://hieswap.com](https://hieswap.com/) Official website, and connect the wallet.

You need to switch your wallet to the mainnet where you want to initiate the transaction.

<figure><img src="/files/FcbaPaYtMTeXTzZgZs8v" alt=""><figcaption></figcaption></figure>

### Currently supports six mainnets

> **FSC  BSC  OEC HECO  ETH TRON**

**Mobile Wallet**

TokenPocket：<https://tokenpocket.pro/>

Huobi Wallet：<https://huobiwallet.fi/>

Trust Wallet：[https://trustwallet.com/](https://link.zhihu.com/?target=https://trustwallet.com/)

Coin98 Wallet：[https://coin98.app/](https://link.zhihu.com/?target=https://coin98.app/)

BitKeep：[https://bitkeep.io](https://bitkeep.io/)

Ave Wallet：[https://avedex.cc](https://avedex.cc/)

Wheat wallet：[https://mathwallet.xyz](https://link.zhihu.com/?target=https://mathwallet.xyz/)

Both Ave Wallet and BitKeep, which are currently the main official cooperation, have included HieSwap, which can be quickly logged in through the Dapp area

### Start cross-chain exchange

1.1 Select swap-out chain and currency and swap-in chain Take USDT as an example (FSC cross-chain to BSC)

<figure><img src="/files/Dhzwq3TV9lhEIFlExVB1" alt=""><figcaption></figcaption></figure>

1.2 Enter the quantity to be exchanged. For each exchange, a corresponding quota authorization signature is required

<figure><img src="/files/qqHsWNEj6me1WHCHqsIF" alt=""><figcaption></figcaption></figure>

1.3 After the signature of the authorized amount is completed, the exchange signature will be automatically performed

<figure><img src="/files/WFyw5aFdUjWGU2Fxuv3Y" alt=""><figcaption></figcaption></figure>

1.4 The redemption window is loaded and the redemption is complete

<figure><img src="/files/6xjli1V3LUlhGOExnGpn" alt=""><figcaption></figcaption></figure>

1.5 View the number of cross-chain exchanges

<figure><img src="/files/8CyugMNxOsCRYIDJze7v" alt=""><figcaption></figcaption></figure>


# Common problem

> ### What is Relayer Gas Fee?
>
> The transaction you initiate on the original chain is to directly deduct the gas fee from your account; while the transaction on the target chain needs to be completed with the assistance of the relay account, and the gas fee is prepaid by the relay account, so the target chain will charge the estimated gas fee equivalent USDT is used to purchase HT/BNB to add to the relay account.

> ## Transaction fee?
>
> The HieSwap platform charges 0.3% to 0.5% of cross-chain fees. Gas fee, because each chain is different, follow up the current latest transaction of each chain to determine the amount of gas, the estimated gas fee generated is the fee generated by the corresponding target, not charged by the platform.

> ### The cross-chain exchange has been deducted, but it has not been credited?
>
> Generally, this kind of problem will not occur, but this kind of problem has a certain probability, because when each chain user is operating, there is a certain relationship between the main network network at both ends of the exchange chain and the target chain. If not, please Wait patiently for 30 minutes, and will check again. If the account is still not received, you can feedback it to the administrator in the corresponding group.

> ### How long does it normally take to arrive?
>
> The normal exchange transaction (within 20 seconds) arrives in the account, of course, this has a certain relationship with your transaction amount and the corresponding main network.


# View cross-chain assets

Where to view my asset tutorial after conversion

## FOREWORD

Currently, the FSC and BSC chains supported by HieSwap are all ETH series. The blockchains of the ETH system share the same set of addresses and private keys. As long as you have created a wallet address on one of the chains, you can create an account with the same address by switching the main network on the PC side or importing the private key of the address in the wallet APP. , and view the assets transferred to the chain.

<figure><img src="/files/lgYB7WXyXZtOdvVbQVOP" alt=""><figcaption></figcaption></figure>

### The following will introduce USDT cross-chain from BSC to FSC as an example:

## View cross-chain assets tutorial on PC

### First Step:

Use Google browser to enter the MetaMask official website <https://metamask.io> to download the plug-in wallet, and complete adding FSC and BSC to the mainnet.

<figure><img src="/files/wI557u5wNeJPf0rowKbY" alt=""><figcaption></figcaption></figure>

### Step Two:

1. Add the USDT currency of BSC chain and FSC chain

&#x20;  BSC chain USDT contract address is: 0x55d398326f99059ff775485246999027b3197955

&#x20;  The FSC chain USDT contract address is: 0x9a9eD7440a3850c4D7240c9FcA8B7C96802615f0

2. Open the official website of HieSwap <https://hieswap.com> and connect to the wallet. After entering the exchange amount, click the authorization and exchange button.

<figure><img src="/files/YQRjUwRt01oKmhhkQmiq" alt=""><figcaption></figcaption></figure>

### Third Step : (Successful account)

Switch to the main network of FSC and you can see the assets converted into the account.

<figure><img src="/files/8CyugMNxOsCRYIDJze7v" alt=""><figcaption></figcaption></figure>

## View the cross-chain asset tutorial on the mobile terminal

#### This time, we will introduce USDT cross-chain from BSC to FSC as an example:

### First Step:

1. Open the mobile wallet, add the FSC main network, [**and add the FSC main network tutorial reference, you can click this link to view.**](https://docs.fonscan.io/bridgewallet/wallettutorial/tokenpocket)
2. After the FSC main network is added, the private key of the BSC chain wallet is successfully copied and imported into the FSC chain wallet.

<figure><img src="/files/bi9k7800HgK45pTWXZGi" alt=""><figcaption></figcaption></figure>

## Second Step

1. Return to the BSC chain wallet, and open the official website of HieSwap [https://hieswap.com ](<https://hieswap.com >)through the wallet browser and connect the wallet. After entering the exchange amount, click the authorization and exchange button.
2. After the exchange is successful, switch the mobile wallet to the main network of FSC and add the USDT currency of the FSC chain to see the assets exchanged into the account.
3. The FSC chain USDT contract address is: 0x9a9eD7440a3850c4D7240c9FcA8B7C96802615f0

<figure><img src="/files/4Df6yEeA9Sq4Aw4zD28j" alt=""><figcaption></figcaption></figure>


# Link HieSwap

## 1. Step 1 (Open the official website)

Use Google Chrome to enter MetaMask official website <https://metamask.io>

<figure><img src="/files/BL9SKhqH64K3duYXObgr" alt=""><figcaption></figcaption></figure>

## 2. Step 2 (add plugin)

Add through Google, install the "MetaMas" plug-in, click Add to Chrome

<figure><img src="/files/x3yhXUifz4Smn4KTTAea" alt=""><figcaption></figcaption></figure>

## 3. Step 3 (Create wallet)

After installing the "MetaMas" plug-in, choose the way you want to import

The latest version of MetaMas import only supports mnemonic words, please develop the habit of saving mnemonic words.

<figure><img src="/files/OGYQpMK2WhEvQN2msri6" alt=""><figcaption></figcaption></figure>

## 4. Step 4 (add network)

After the import or creation is complete, officially enter the "MetaMas" wallet, select Add Network, and add the basic information of the mainnet

<figure><img src="/files/36HOucki9aBgA0sBGt9G" alt=""><figcaption></figcaption></figure>

## 5. Step five (manually added)

Manually add mainnet network information, as well as RPC and browser related information

<figure><img src="/files/vdumJOJPLN4nn78RcRVd" alt=""><figcaption></figcaption></figure>

## 6. Step 6 (Network parameters)

Fill in Take FON Chain as an example, add basic network information, please fill in and check whether it is correct

```
Network name: FON Chain

RPC URL: the current official public RPC
https://fsc-dataseed1.fonscan.io
https://fsc-dataseed2.fonscan.io

Chain ID: 201022
Currency symbol: FON
Browser URL: https://fonscan.io
```

<figure><img src="/files/IfceAOIyWWzkFOG42ugI" alt=""><figcaption></figcaption></figure>

```
Configure the BSC network according to the following parameters:
Network name: BSC main network
Add RPC URL:
https://bsc-dataseed.binance.org

Chain ID: 56
Symbol (optional): BNB
Browser URL (optional):
https://bscscan.com
```

```
Configure the OEC network according to the following parameters:
Network name: OEC main network
Add RPC URL:
https://exchainrpc.okex.org

Chain ID: 66
Symbol (optional): OKT
Browser URL (optional):
https://www.oklink.com/okexchain
```

```
Configure the Heco network according to the following parameters:
Network name: Heco main network
Add RPC URL:
https://http-mainnet-node.huobichain.com

Chain ID: 128
Symbol (optional): HT
Shield Manager URL (optional):
https://hecoinfo.com/
```

```
Configure the Polygon network according to the following parameters:
Network name: Polygon mainnet
Add RPC URL:
https://rpc-mainnet.maticvigil.com/

Chain ID: 137
Symbol (optional): Matic
Shield Manager URL (optional):
https://polygonscan.com/
```

## 7. Step 7 (Complete the operation)

Adding the above completes the use of adding the FON Chain network through "MetaMas"

<figure><img src="/files/xtop07RtlqG9Pw0IlL5Q" alt=""><figcaption></figcaption></figure>

{% hint style="danger" %}
Kind tips:&#x20;

Please be sure to keep your mnemonic or private key in a safe place to avoid loss of assets.
{% endhint %}


# Chain Liability Risk

In the Defi world, every smart contract has its own risks.&#x20;

HieSwap was created with safety and security in mind from the very beginning. HieSwap itself does not have a liquidity pool, and realizes asset exchange by accessing the liquidity of one or more decentralized trading platforms on different chains. Therefore, if these chains or trading platforms have smart contract risks, you may therefore suffered losses.


# Disclaimer

When a user initiates a cross-chain request, we will only authorize the user's current cross-chain quota

Guarantee how much the user uses for each transaction

Due to the large number of phishing scam addresses in the Defi field, authorized theft of user assets occurs frequently

Please be sure to check whether your private key is leaked, whether it is a dangerous operation to authorize some unknown contracts

We will only communicate with your cross-chain acceptance address