AxelarSea入门简介 (Introducing AxelarSea!)

Interoperability has been a fundamental issue in the blockchain ecosystem since its inception. This includes the NFT market, where buyers and sellers are limited by the difficulty of moving assets across chains. AxelarSea, powered by Axelar Network, aims to facilitate both buyers and sellers in achieving the most efficient NFT trades where they are not constrained by the chains.

自区块链生态系统诞生以来，交互性一直是一个基本问题。NFT 市场，买家和卖家都受到跨链转移资产难度的限制。 AxelarSea 由 Axelar Network 提供支持，旨在促进买卖双方在不受特定链约束的情况下实现最有效的 NFT 交易。

AxelarSea is a one-stop interoperable NFT marketplace across chains where buyers can pay for an NFT on any supported chain using a token from a completely different chain, and sellers can list an NFT for sale on any supported chain while receiving payments on another chain.

AxelarSea 是跨链一站式可交互NFT 市场，买家可以使用来自完全不同链的代币在任何受支持的链上支付购买NFT的资金，卖家可以在任何受支持的链上列出要出售的 NFT，同时在另一条链上接受付款。

AxelarSea’s goal is to provide solutions that
AxelarSea 的目标是提供解如下决方案:

For sellers: A seller can sell an NFT on one chain (chain A) while putting up an asking price and receiving payment on another chain (chain B).
对于卖家：卖家可以在一条链(链 A）上出售 NFT，同时在另一条链(链 B）上设定价格并接收付款。
For buyers: A buyer can place an order for an NFT hosted on one chain (chain A) and pay with tokens from another chain (chain C).
对于买家：买家可以下单购买“存放”在一条链(链 A）上的 NFT，并使用来自另一条链(链 C）的代币进行支付。

Even though the buyer’s payment is made on chain C, it will be automatically transferred to chain B via the Axelar Network, as requested by the seller. The buyer is not required to own any assets/wallets on chain B.

即使买方的付款是在链 C 上进行的，它也可以根据卖方的要求通过 Axelar 网络自动转移到链 B。买方不需要拥有链 B 上的任何资产/钱包。

P1:Diagram of the flow of NFT and assets between a seller and a buyer through AxelarSea without any constraint of the different chains, via Axelar Network.

图1:通过 Axelar 网络，卖家和买家之间的 NFT 和资产不受不同链的任何约束。

当前NFT市场的痛点 (Painpoints in the current NFT marketplace)

Currently, the payment tokens and the NFT must be on the same chain. If an NFT is hosted on one chain, for example, the buyer must pay with a token and have a wallet on that chain. Even though some marketplaces (such as EVM) operate on multiple chains within the same ecosystem, there is no single universal marketplace that connects and facilitates transactions across multiple ecosystems. As a result, there are a plethora of marketplaces that complicate the experience of both buyers and sellers.

当前，支付代币和 NFT 必须在同一条链上。例如，如果 NFT 托管在一条链上，则买方必须使用代币付款并在该链上拥有钱包。尽管某些市场(例如 EVM）在同一生态系统内的多个链上运行，但没有一个通用市场可以连接和促进多个生态系统的交易。因此，过多的市场使买卖双方的体验变得复杂。

AxelarSea如何帮助买家 (How does AxelarSea help buyers?)

For most buyers, they don’t possess asset on all available chains in the blockchain ecosystem; hence, if they want to buy an NFT on a chain that they don’t have any token, they have to move their assets to that chain, incurring high fees and security risks/delay through bridges.

对于大多数买家来说，他们并不拥有区块链生态系统中所有可用链上的资产；因此，如果他们想在没有任何代币的链上购买 NFT，他们必须将资产转移到该链上，从而在使用跨链桥时产生高额费用和安全风险/延迟。

Let’s consider the following example situation:
让我们来思考一下下面的情形:

An NFT is hosted on Ethereum chain with an asking price quoted in $ETH.
NFT 托管在以太坊上，用ETH计价。
A potential buyer has assets as $LUNA on Terra chain. 一个潜在的买家只有Terra上的$ LUNA

Using a tradiational NFT marketplace, the buyer has to go through the following steps:
如果使用传统的NFT市场，买家就需要进行下面几步:

Looking for a bridge that support asset transfer from Terra chain to Ethereum chain.
Looking for an asset supported by the bridge. For example, some bridges might not support $LUNA, and only support $UST as a transferring asset.
Searching for DEX on Terra to exchange $LUNA to an asset supported by the bridge, which is $UST in this example.
Creating a wallet that supports Ethereum chain.
Funding the Ethereum chain wallet with $ETH for transaction fees.
Searching for DEX on Ethereum chain to exchange the asset supported by the bridge ($UST) to $ETH.

寻找支持从 Terra 到 Ethereum 转移资产的跨链桥。
寻找跨链桥支撑的资产。例如，有些跨链桥可能不支持 $LUNA，只支持 $UST 作为资产转移。
在 Terra 上搜索 DEX，将 $LUNA 兑换成桥支持的资产，本例中为 $UST。
创建一个支持以太坊的钱包。
用 $ETH 为以太坊钱包提供交易费用。
在以太坊上搜索DEX，将跨链桥支持的资产($UST)兑换成ETH。

P3:Steps taken by a buyer to move an asset on Terra chain to buy an NFT on Ethereum chain.

图3：买家将 Terra 链上的资产转移到以太坊链上购买 NFT 的步骤。

Steps needed for a buyer to buy an NFT on a chain that he/she doesn’t have an asset on, as described above, are riddled with problems, that can be categorized as following:

如上所述，买家在他/她没有资产的链上购买 NFT 所需的步骤充满了问题，可分为以下几类：

High fees: The buyer has to spent fees on many steps including making exchange on DEX on both chains, the bridge, and funding wallet on the new chain.
高费用：买方必须在许多步骤上付费，包括在两条链上的 DEX 上进行交换、跨链桥和新链上的资金钱包。
Inconvenience: The buyer has to research for the bridge that support the transfer, the wallet for the new chain, how to fund the new wallet, and the DEX on the new and unfamiliar chain.
不方便：买家要研究支持转账的桥，新链的钱包，新钱包如何注资，新链和陌生链上的DEX。
Security: The buyer experiences security risk (for example, phishing attack) when searching for bridge and DEX on an unfamiliar chain.
安全：买家在陌生链上搜索bridge和DEX时会遇到安全风险(例如钓鱼攻击）。
Time consuming: The buyer wastes time to execute several steps and doing research of the new chain.
耗时：买方浪费时间执行几个步骤并研究新链。

基于AxelarSea的解决方案 Solutions (via AxelarSea)

Many of the steps required by a buyer described above are automatically executed by AxelarSea. The buyer only need to supply $LUNA to AxelarSea on Terra chain. AxelarSea system will perform the following actions.

上述买方所需的许多步骤由 AxelarSea 自动执行。买方只需向 Terra 链上的 AxelarSea 提供 $LUNA。 AxelarSea 系统将执行以下操作。

Transfer the asset to Ethereum chain via Axelar Network (becoming $aLUNA)
通过 Axelar Network 将资产转移到以太坊链(成为 $aLUNA）
Make an exchange to $ETH through DEX supported by AxelarSea
通过 AxelarSea 支持的 DEX 兑换 $ETH
Transfer $ETH to the seller
将ETH发送给卖方

Notice that the buyer doesn’t need to setup wallet on Ethereum chain at all.
请注意，买家根本不需要在以太坊链上设置钱包。

P4:Buyer needs to simply deposit his asset and AxelarSea will automatically transfer the asset cross-chain, swap the tokens, and transfer it to the seller.

买家只需存入资产，AxelarSea 会自动跨链转移资产，交换代币，转给卖家。

AxelarSea如何帮助卖家 (How does AxelarSea help sellers?)

Currently, each NFT marketplace is confined to a certain ecosystem. If a seller wishes to place sales of his multiple NFTs on several ecosystems, he/she has to interact with multiple marketplaces, complicating the experience. For example, if a seller owns NFTs on three different blockchain ecosystem (such as EVM, Polkadot, and Cosmos), he/she would need to interact with three different marketplaces — one for each ecosystem.

目前，每个 NFT 市场都局限于某个生态系统。如果卖家希望将他多个 NFT放在多个生态系统中销售，他/她必须与多个市场进行交互，从而使体验复杂化。例如，如果卖家在三个不同的区块链生态系统(例如 EVM、Polkadot 和 Cosmos）上拥有 NFT，他/她将需要与三个不同的市场进行交互—每个生态系统一个。

P5:A seller needs to interact with different NFT marketplace for each ecosystem. Each NFT is confined to buyers who have access to those chains supported by each marketplace

图5:卖家需要与每个生态系统的不同 NFT 市场进行交互。每个 NFT 仅限于可以访问受市场支持的链上的买家

A seller has to interact with multiple marketplaces — each specific to a certain blockchain ecosystem. This setup leads to the problems, that can be categorized as follow.

卖家必须与多个市场互动——每个市场都限定于某个区块链生态系统。这种设置会导致问题，分类如下：

Hard to track: With several NFTs being listed for sale on multiple marketplaces specific for each chain, the seller will have a hard time tracking all the sales and struggle to visualize the big picture.
难以追踪：由于每个链的多个市场上都有多个 NFT 上市销售，卖家将很难跟踪所有销售情况，并且难以想象宏观状态
Limited potential buyers: The sale is exposed only to the buyers in the chains supported by the marketplace.
限制潜在买家： 此次销售仅向市场支持的链上的买家公开。
Time consuming: A seller would spend a large amount of time trying to manage his sales over multiple marketplaces.
耗时：卖家会花费大量时间来管理他在多个市场上的销售。

Solutions (via AxelarSea)

AxelarSea provides a platform for sellers to list NFTs from any chain while also attracting potential buyers from any chain. The seller can manage all of his sales by simply visiting the AxelarSea website and connecting his wallets.

AxelarSea 为卖家提供了一个平台，可以列出来自任何链的 NFT，同时也吸引来自任何链的潜在买家。卖家只需访问 AxelarSea 网站并连接他的钱包即可管理他所有销售的NFT。