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BitVM’s goal is to scale Bitcoin, not be a pseudo-Ethereum, says dev

Building a decentralized exchange on Bitcoin would be a “step backward,” for example, said Bitcoin developer Super Testnet.

One of the developers working on “BitVM” — a Bitcoin-based virtual machine — reiterates the tech is intended to scale Bitcoin rather than launching Ethereum-like decentralized finance applications on the network.

BitVM’s whitepaper was released by ZeroSync’s project lead Robin Linus on Oct. 10 with technical support provided by pseudonymous developer “Super Testnet” — implementing BitVM’s first proof-of-concept and working on expanding BitVM’s capabilities.

Upon its release, some industry pundits formed the impression that BitVM would bring DeFi to Bitcoin like what the Ethereum Virtual Machine (EVM) did for Ethereum.

However, Super Testnet tells Cointelegraph that BitVM is scaling-focused rather than being about implementing smart contracts and an avalanche of altcoins:

“The real killer app is scaling Bitcoin. [Robin Linus isn’t] a big fan of smart contracts. He's not a big fan of increasing Bitcoin's expressivity. He really is interested in making it so that Bitcoin can process millions of transactions per second.”

Super Testnet said he doesn’t want BitVM to be flooded with (EVM)-like tokens because it’ll bring bad actors to Bitcoin:

“I don't want to see everything from the Ethereum ecosystem because most of it is Ponzi schemes.”

Building a decentralized exchange on Bitcoin would be a “step backward,” he added.

Meanwhile, Super Testnet notes that BitVM won’t be an “instant death” for Ethereum’s altcoins, which some have suggested — though it could take demand away from them.

The developer hopes that Bitcoin (BTC) essentially remains the only monetary unit on the Bitcoin network:

“A big property that makes Bitcoin important is maintaining one monetary asset that everyone can agree on instead of having floating exchange rates that are a burden for commerce,” he said.

BitVM could patch up one of Lightning’s flaws

Meanwhile, Super Testnet said BitVM’s intended payment infrastructure will also aim to improve one of the Lightning Network’s shortfalls — payment reliability.

“Lightning is wonderful as a system and it's much faster than probably anything we can make on Bitcoin. But one thing that Lightning doesn't do well is payment reliability.”

River, a Bitcoin-only exchange, revealed its Lightning payments success rate was 99.7% in August across 308,000 transactions.

He hopes BitVM can reach 60% of the transaction speed of the Lightning network.

Related: Coinbase to integrate Bitcoin Lightning Network: CEO Brian Armstrong

The developer has also stressed that BitVM is optional like the Lightning Network and anyone will be able to transfer BTC or Bitcoin-assets out of the virtual machine back into cold storage or wherever they were beforehand.

“No one is forcing you to send your money into a virtual machine. If you want your money safe, keep it safe.”

'Compute anything' misconception

Super Testnet also clarified a possible misunderstanding, explaining that BitVM, in its current state, cannot compute “anything” like its whitepaper suggests.

“We have to build more primitives in order to make it so that anything can run in it.” Implementing SHA-256 and encryption are some of the additions that need to be made, they noted.

However, Super Testnet revealed on Oct. 12 that BitVM is already processing basic functions:

Linus and Super Testnet met at a Bitcoin conference around 18 months ago and have been working to scale Bitcoin at the scripting level almost ever since, he said.

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Bitcoiner drops BitVM paper — bringing Ethereum-like contracts to Bitcoin

The author of the white paper, Robin Linus, based BitVM’s architecture on Ethereum’s optimistic rollups with fraud proofs and recent Merkle tree developments.

A Bitcoin developer has proposed a new way to bring more expressive off-chain smart contracts to Bitcoin (BTC) without needing a soft fork.

Announced in an Oct.9 white paper titled “BitVM: Compute Anything on Bitcoin” by ZeroSync’s project lead Robin Linus, BitVM enables Turing-complete Bitcoin contracts without altering Bitcoin’s consensus rules.

A Turing Complete system is one which can theoretically provide an answer to any computational problem.

With BitVM, the “logic” of Bitcoin contracts would be executed off-chain but verification would be made on Bitcoin — similar to Ethereum’s optimistic rollups.

BitVM’s architecture is based on fraud proofs and a challenge-response model where a “prover” can make claims and a “verifier” can perform a fraud-proof to punish the prover when false claims are made.

Linus explained that Bitcoin, in its current form, is limited to basic operations, such as signatures, timelocks, and hashlocks — but that can now be broadened with BitVM, which Linus says can compute a host of interesting applications.

“Potential applications include games like Chess, Go, or Poker, and particularly, verification of validity proofs in Bitcoin contracts.”

“Additionally, it might be possible to bridge BTC to foreign chains, build a prediction market, or emulate novel opcodes,” said Linus.

Linus said a limitation of the model is that it is limited to a two-party setting with a prover and a verifier and that a significant amount of off-chain computation and communication is needed to execute programs.

Linus said the next “milestone” is to fully implement the BitVM in addition to Tree++ — a high-level programming language to write and debug Bitcoin contracts.

BitVM is enabled by the Taproot soft fork which took place in November 2021.

Linus cited Ethereum research into optimistic rollups and a study on Merkle Trees in contributing to the eight-page white paper.

Bitcoiners respond to BitVM

Prominent Bitcoiner Eric Wall posted on X (Twitter) that the concepts outlined in the BitVM white paper “check out” and is “cautiously excited” to see what real-world experiments stem from it.

Bitcoin analyst Dylan LeClair is also impressed with BitVM’s white paper. But Adam Back, a Bitcoin Core contributor suggested that people shouldn’t get too excited about the development just yet.

Related: BIP-300 biff: Debate reignites over years-old Bitcoin Drivechain proposal

One builder in the blockchain space, “dotta,” noted that there is already a proof-of-concept on GitHub.

Another X user, Sam Parker, attempted to resolve a common fear among Bitcoin maximalists by explaining that BitVM won’t force Bitcoin’s to be “locked” into these contracts.

“Finally, this is opt-in. If you don’t trust your coins being locked to some Turing complete contract (totally reasonable) then don’t lock them to a Turing complete smart contract. One of [the] beauties of the UTXO system is security sandboxing.”

Others, such as “psage” say BitVM adds to the list of things that will push Bitcoin’s price forward in the next bull market.

Cointelegraph contacted Linus for comment but did not receive an immediate response.

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