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Oasis launches Ethereum-compatible privacy blockchain Sapphire

The new developer environment aims to drive privacy-first, cross-chain DApp development for the Ethereum ecosystem and smart contract blockchain networks.

Decentralized applications could tap into improved privacy features as blockchain firm Oasis launches its confidential EVM-compatible blockchain Sapphire.

Sapphire and the Oasis Privacy Layer (OPL) are now live, allowing existing decentralized applications (DApp) on Ethereum Virtual Machine (EVM) networks to make use of the blockchain’s privacy-first features without having to carry out cross-chain swaps for respective tokens.

Cointelegraph reached out to Oasis to unpack the core components of the Sapphire blockchain and how it could help drive cross-chain Web3 development focused on privacy features for smart contracts.

Oasis Foundation director Jernej Kos said that OPL in particular allows developers that have built DApps on any EVM network to integrate a variety of Sapphire’s features without having to migrate to the Oasis blockchain:

“Being fully EVM-compatible means that developers can build private smart contracts in an environment that they are already familiar with, for example Solidity smart contracts running on the EVM as known from Ethereum.”

Kos added that the functionality also improves the ability to deploy DApps across different chains and make them compatible. Another example would be having a core DAO smart contract on Ethereum (ETH) while handling fully private voting on Sapphire, with end-results being sent back to the core DAO contract.

“In this way the privacy capabilities of Sapphire are exposed to any other chain.”

According to the Oasis Foundation director, the majority of DApps being developed on Oasis are privacy-centric and enable users with full control over their on-chain data to control how that gets shared and accessed. This is also evident in a list of different tools and platforms that have been built within the Oasis ecosystem.

Related: Oasis Foundation launches $160M development fund

Kos highlighted confidential decentralized exchanges, privacy-enabled blockchain gaming, account abstration, confidential NFTs, private voting, sealed-bid auctions, key management and decentralized identification as use cases that have come to the fore from builders on the Oasis chain.

Magazine: Here’s how Ethereum’s ZK-rollups can become interoperable

Bitcoin completes its fourth halving, block rewards now stand at 3.125 BTC

New DeFi ‘passport’ could enable under-collateralized crypto loans

Arcx has launched a new version of its “DeFi Passport,” Sapphire, promising the pseudonymous on-chain credit check will enable new decentralized finance products.

Decentralized finance (DeFi) protocol Arcx has announced the launch of Sapphire v3, a DeFi passport allowing crypto users to pseudonymously build and verify their reputation on-chain.

Announced June 2, the DeFi passport will score users on a scale between 0 and 1,000, with Arcx advancing that the passport “incentivizes reputation-building and curates on-chain identity into DeFi.”

In the absence of a DeFi passport, Arcx asserts that “protocols are left to treat every user the same, occasionally giving preferential consideration to wallet size, institutional backing, or restrictive KYC.”

Arcx expects its passport will be integrated onto many DeFi protocols, predicting Sapphire will allow projects to offer “low-collateral loans and high-yield farms” targeting users with high credit scores. As such, Arcx’s passport could facilitate growth in the emerging sector of DeFi-powered under-collateralized loans.

Speaking to Cointelegraph, the CEO and co-founder of institutional under-collateralized loan protocol Maple Finance, Sidney Powell, commented that “Arcx’s passport will help bring under-collateralized loans closer for retail DeFi users.”

Although Powell stated “there is no doubt that stickier reputations and identities would be positive for retail under-collateralized loans,” he speculates that the use of zero-knowledge proofs could bolster the passport’s adoption “by encouraging users to share off-chain information about themselves in the confidence that they maintain confidentiality.”

Powell added that the Sapphire passport should consider a loan’s “affordability,” stating:

“An address may have had a great record of repaying $10K loans on Compound, but how creditworthy would they be on a $250K loan? This is something Arcx can address over time with more data.” 

Looking forward, Arcx hopes to evaluate individual scores for a range of criteria, including their “Airdrop Score” and “Yield Farming Score” — which estimate the likelihood of an address holding onto airdropped or farms tokens over the longer term, and a “Governance Score’ that assesses whether an address is likely to participate in on-chain governance.

The protocol also aims to provide “Trader Scores” intended to ascertain whether a user is employing bots to execute trades, with Arcx suggesting DEXes could offer reduced trade fees to addresses verified not to be using bots.

Arcx also revealed it recently raised $1.3 million from top crypto investors including Dragonfly Capital and Scalar Capital, bringing its total sum raised to $8.2 million. Tom Schmidt of Dragonfly Capital stated:

“DeFi today is like the Wild West. People can walk up to any random protocol, front-run users, rack up a bunch of bad system debt, and bounce over to the next town. If we’re going to build a new global financial system, we’re going to need something better than the pseudonymous systems we have today.”

Bitcoin completes its fourth halving, block rewards now stand at 3.125 BTC