ZK-Rollups on Bitcoin: Way more scalable than on Ethereum
In this post, sCrypt implemented the first-ever ZK-Rollup (ZKR) directly on Bitcoin. They also showed why ZKR works better on Bitcoin than on Ethereum.
Xiaohui Liu
author
Articles By Xiaohui Liu:
zk-SNARKs on Bitcoin: Run Zcash on Bitcoin
zk-SNARK is a powerful primitive for blockchain privacy and scalability, and in this article, sCrypt showed what zk-SNARK is and how to implement it on Bitcoin.
BLS signatures on Bitcoin—Pairing-based cryptography: Part 2
sCrypt have demonstrated how to verify a single BLS signature on Bitcoin and how BLS’s main power lies in aggregated signatures and keys.
Introducing Solidity to sCrypt transpiler: Run Ethereum smart contracts on Bitcoin
The transpiler facilitates developers to migrate their applications onto the Bitcoin network from Ethereum and other Solidity/EVM-compatible blockchains without writing code from scratch.
Bilinear pairings on Bitcoin—Pairing-based cryptography: Part 1
In this article, sCrypt demonstrates how pairings can be implemented directly on Bitcoin and thus enable all kinds of pairing-based cryptography applications previously thought impossible.
Ring signatures in Bitcoin: Run Monero on Bitcoin
A ring signature is a digital signature that allows a message to be signed by a member of a group, or a ring. It proves that someone in the ring signs, but there is no way to tell who the signer is.
Zero-knowledge puzzles
sCrypt generalizes the proof of knowledge of a private key using zero-knowledge proof techniques, constructing arbitrary complex puzzles, called zero-knowledge puzzles, as spending conditions.
Delegation in Bitcoin: Part 3
Crypt generalizes the "Script level" delegation to delegate to any script/smart contract instead of a public key. This allows users to authorize arbitrary smart contract to spend one's bitcoin.
Emulate any SIGHASH flag without a fork by programming it in a smart contract
sCrypt developed a novel approach to emulate any SIGHASH flag by coding the logic in a smart contract. It requires no protocol change and is more practical than adding a hardcoded flag through a fork.
Graftroot on Bitcoin today: No fork needed
sCrypt demonstrated how to implement Taproot on the original Bitcoin using a contractless contract and shows that its follow-up proposal, Graftroot, can be implemented in a similar fashion.
Contractless contract
sCrypt has developed a technique called "contractless contract" to faithfully execute any smart contract in a regular payment (P2PKH) transaction.
Taproot on Bitcoin: Contractless Contract + MAST
In this article, sCrypt showed how to implement Taproot using the original Bitcoin protocol without any changes, by combining contractless contract and Merklized Alternative Script Tree (MAST).