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The xDeFi’s protocol stack has launched on the Ethereum Kovan testnet on December 15, 2020, and from February 7, 2021, all users have been invited to test and experience Swap, Pool, Farm and HalfLife functional modules with prizes. In order to let more users that played DeFi pay attention to the xDeFi and experience related functions, we specially launched an activity of “Invite friends to follow xDeFi and win massive rewards”.

​Activity time

2021.02.09 15:00 PM- 2021.03.02 15:00 PM (UTC+8)

Activity contents

Activity: Invite friends to follow xDeFi’s community and win massive rewards

Way of participation:


1 NFT Trading: A Perspective of the Discrete World

ERC-20 standard appeared on Ethereum blockchain in 2016, brought ICO mania in 2017 and De-Fi Cambrian in 2020 to this ecosystem. At the same time period, an unignorable trend was also slowly emerging, which is named Non-fungible Token, become one of the most important complement to ERC-20. It appeared in cat cultivation in Crypto-Kitties, real estate, and household auctions in Decentraland, 3rd party on-chain trading platforms of games like Enjin, and also ENS — Ethereum Name Services ( similar to DNS, Domain Name Service on the Internet). …


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The protocol stack of xDeFi was launched on the Ethereum Kovan testnet on December 15, 2020, and now the user “Rewarded Test to Earn XDEX” activity is officially opened.

All users are invited to test and experience the Swap, Pool and xHalfLife functional modules. During this test, valid users participating in the test can share a token incentive of 100,000 XDEX tokens (excluding bug rewards).

Activity Time

2021.02.07 17:00 PM- 2021.02.21 17:00 PM (UTC+8)

Activity contents

Activity 1 : Experience xDeFi immediately and share 100,000 XDEX

Activity reward : 20 XDEX/person

Reward quota : First-come-first-served, this test will automatically end after the reward is…


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This tutorial recommends using Google browser, and you need to have successfully installed Metamask wallet. I won’t go into details about the installation process of Google browser and Metamask wallet. If you have any questions, you can find tutorials on the Internet.

This tutorial mainly explains how to receive multiple tokens on testnet for the Ethereum Kovan required for xDeFi test activities.

Note: Each Metamask account corresponding to each ip address can only receive test tokens once, otherwise it is an invalid test account.

1. Firstly, you need to receive the ETH of the Kovan testnet.

Method 1: To receive…


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1. On Inflation and Ecosystem Evolvement

1.1 Inflation As Equity Private Placement For Service Providers

As the first and the only successful 4-year-halving cryptocurrency, Bitcoin, together with its founder Satoshi Nakamoto, was always surrounded by stories and rumors. Comparing to earlier approaches like B-Money (1998) and Hash Cash(2002), Bitcoin is not the first peer-to-peer electronic cash system, but its occurrence in 2009 made it the most timely one: The network communication, GPGPU for PoW (Proof of Work) system, and Web2.0 ( user-generated-content era) were well developed in a wide range of the world between 2000–2015, removing obstacles for people to understand Bitcoin. With almost zero cost…


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  1. On Ethereum Layer-2 Technology, from John Wu, Polkadot scientist from xDeFiLabs, Polkadot community developer

At the end of 2019, several years after the concept introduced by Vitalik Buterin, several teams implemented their own version of zk-rollup, a zero-knowledge system for increasing the overall transaction throughput of Ethereum blockchain. With technologies of decentralized triangular arbitrage as its first product, a team from Silicon Valley named Loopring updated its roadmap to decentralized exchange empowered by their zk-rollup implementation, which can save 93% (in medium) gas fee for users trading on the “order book-styl”e loopring.io. …


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# 0x0001 Cambrian Explosion of Decentralized Finance

ETH, as the native Ethereum blockchain token, owned its greatest reputation after the flash-crash on March 12th, 2020. The fee market in that day rushes to 600Gwei due to the risk-exposure of ETH and BAT token position, which are saved in MakerDAO, to mint DAI tokens, which pumps DAI to 1.18USD and also boost Ethereum miners’ rewards. These rewards are mainly given to miners using graphic cards, and some to ASIC miners using InnoSilicon’s A10 series.

We call June-September 2020 “the Cambrian Explosion of Decentralized Finance”. Despite the 5-year evolution of MakerDAO, at the end of 2019, products like Compound.finance…

XDefiLabs

xdefi.com, A Stack of Decentralized Finance Protocols

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