multi-party-ecdsa VS darknode-cli

Use MPC instead? Sadly there are not enough mature open source projects around: https://github.com/ZenGo-X/multi-party-ecdsa and you can always take a look at https://github.com/rdragos/awesome-mpc

Sadly companies like Unbound were acquired by Coinbase and the OSS codebase is not longer maintained: https://github.com/unboundsecurity/blockchain-crypto-mpc

Ha nice call!

Unfortunately we have not completed a satisfactory security audit. We engaged with one company, but I don't think they were worth their salt. The problem is that the "good" companies are much more expensive, so it's a consideration of the value of the security audit. (If you know of a reputable company that would like to audit for free though...)

The code is not yet open source, but we are primarily expanding on this open-source library. https://github.com/ZenGo-X/multi-party-ecdsa

As true decentralized security enthusiasts, we quickly got in touch with ZenGo and fixed the discovered security breach in a pull request. It was soon approved and merged into their TSS library. The researcher who found the attack was granted a bug bounty, the biggest in ZenGo’s history.

WBTC is centralized. you give your bitcoins to a company and they create a ERC-20 token to match them and they give that to you. if you want your bitcoins back you have to return to them the ERC-20 token and they burn it or something. obviously this is not so good if you don't want to trust the custodian. renBTC is decentralized and it relies on the same hash time locked contracts that enable bitcoins to be deposited into the lightning network. there is more info at https://renproject.io/ including some documentation but it's not very good.

Let's say you're a business that accepts crypto and what if someone sends you ETH or some coins like USDC. Is it your job to check that these coins didn't come from Tornado? It's quite hard to do that. What if account A got their ETH from Tornado, then sent to account B, which then exchanged the ETH to USDC, which then sent the USDC to account C, which then sent the USDC to you.

This is a problem for Bitcoin as well. What if someone got ETH from Tornado. Then converted the ETH to renBTC (https://renproject.io/). Then converted the renBTC to BTC. Are those Bitcoins now somehow tainted?

use renBTC https://renproject.io/ https://bridge.renproject.io/mint

Here ya go https://renproject.io/

> That involves a trusted third party, doesn't it?

For most cases, yes. Binance, Gemini and some others provide a version of their token that can run in multiple chains. You have to trust them fully.

It's a little bit better for WBTC [0]. WBTC is a consortium of 30+ crypto projects who keep the BTC under their control through a multi-sig wallet, and that can be audited on-chain. In this case, the majority of the signers would have to conspire in order to steal the funds or do anything malicious.

renBTC is even more decentralized. It is part of the ren "network" [1], which provides inter-blockchain applications. I haven't looked yet how it works exactly, but my understanding is custody of BTC happens though a proper dapp.

[0]: https://wbtc.network

[1]: https://renproject.io

Badger Bridge is under maintenance at the moment and will probably be shut down and replaced by a new product in the near future. For the meantime if you don't have any stuck transactions that you need help and are just looking for a similar bridge you can use the https://renproject.io/ one, which uses the same technology that Badger Bridge did (RenVM).

In 2019, investors were introduced to the first wrapped Bitcoin product, WrappedBTC (wBTC). The creation of wBTC by BitGo, Kyber Network, and Ren, formerly known as Republic Protocol was revolutionary in its own right, but wBTC is entirely centralized due to BitGo being the sole custodian for wBTC and this entity, partly owned by Goldman Sachs, has full legal control of all locked Bitcoin wrapped in wBTC.

Solana has turned into a bit of a juggernaut, with huge financial backing, and TVL only behind Ethereum and Binance Smart Chain. It has been attracting dapps and protocols that were previously EVM-only, like Lido and RenVM; but it also has a strong stable of its own Solana-native dapps.

renproject.io is probably the purest way to switch BTC to Ethereum, though you will pay a a pretty hefty ETH gas fee, and it's somewhat complicated for a beginner, though it has the added benefit of teaching you how bridges work in crypto.