DeFi周报- Uniswap v3部署Optimism主网, Lodon升级暂定时间, Perpetual Protocol V2等等

以下这周发生的重大事件：

1. Uniswap v3部署Optimism主网https://twitter.com/optimismpbr/status/1413260412162912258
2. Ethereum mainnet London (包括EIP1559) 升级暂定为2021年8月4日https://github.com/ethereum/eth1.0-specs/pull/223
3. Perpetual Protocol V2 将在Layer2解决方案Arbitrum上线https://twitter.com/perpprotocol/status/1410221752526028801
4. Yearn创办人Andre Cronje开源了几个试验项目https://twitter.com/AndreCronjeTech/status/1411244286146977792
5. Aave Pro将在7月上线https://twitter.com/TraderNoah/status/1411719489947906048
6. Lyra期权交易比赛https://twitter.com/lyrafinance/status/1412238865667026965 [DeFi笔记] 免费参加Lyra的期权交易比赛瓜分总值5万镁的奖金
7. ShibaSwap上线https://twitter.com/Shibtoken/status/1412334569903304704
8. Yearn开发者banteg指出ShibaSwap有合约风险https://twitter.com/bantg/status/1412370758987354116
9. Samuel Shadrach的alpha leak：看有那些项目准备好上L2 https://twitter.com/SamuelShadrach4/status/1411670290917060610
10. Synthetix创办人Kain说未来几星期会有关于Optimism的重大消息https://twitter.com/SNXified/status/1412361032811659269
11. Lido成为了ETH2.0单一最大存款地址https://twitter.com/ASvanevik/status/1404302756593102850
12. ETH交易所总量达到2.5年新低https://twitter.com/cryptoquant_com/status/1411973786941804547
13. Curve USDN pool veCRV投票抽奖https://twitter.com/sasha35625/status/1412718856896978945
14. 加密货币Visa卡半年达到10亿美元使用量https://twitter.com/CoinDesk/status/1412728353644290054
15. 瑞士银行Sygnum提供ETH2.0质押服务https://www.abmedia.io/20210707-sygnum-becomes-first-bank-to-offer-ethereum-staking
16. Axie Infinity (AXS) 爆红https://www.abmedia.io/20210705-axie-generated-more-revenue-than-top-defis https://twitter.com/DappRadar/status/1413026058136399872
17. USDC发行商Circle将透过SPACE上市https://news.cnyes.com/news/id/4674711