Sealed auctions are a well-established method for trading and selling goods and services. With the advent of blockchain technology, sealed auctions can now be implemented on-chain, offering a number of advantages over traditional auctions. In this article, we will implement of a collateralized sealed auction on UTXO-based smart contract blockchains…

Smart contract-based financial instrument — Blockchain technology has the potential to revolutionize the financial markets, and catastrophe bonds are one area where this potential is being realized. Catastrophe bonds are a type of financial instrument that allows investors to hedge against the risk of natural disasters. They work by issuing bonds that pay out to…

Control Distribution of BSV-20 Tokens — In our last article, we have shown smart contracts can control transfers of BSV-20 tokens after minting. Today, we demonstrate how to control distribution/issuance of such tokens. Tickerless mode BSV-20 introduces a tickerless mode in V2 and takes a different approach from V1. Deploy To deploy and mint a token with a supply…

Fungible BSV-20 Tokens based on Ordinals — Previously, we have shown how to integrate Bitcoin smart contracts with Ordinals, which can be regarded as NFTs on chain. In this article, we show how to integrate them with the fungible version, i.e., BSV-20 tokens. We use auction as an example as before, which works the same as the…

Using Hash Time-Locked Contracts — As we have shown before, Ordinals can be seamlessly combined with bitcoin smart contracts. To further demonstrate the power and flexibility of combining them, we lock up an ordinal into a Hash Time-Locked Contract (HTLC) and atomically swap it with bitcoins, allowing trustless trading. Atomic Swap To swap Ordinals and BSV, we…

In our previous article, we showed a way to integrate ordinals with smart contract, by placing an ordinal satoshi and a contract in the same UTXO. Today we introduce an alternative to integrate them, where they are in separate UTXOs. As a showcase, we developed a smart contract that enables…

Lately, Bitcoin Ordinals have garnered significant attention within the blockchain space. One alleged major drawback of Ordinals is its lack of support for smart contracts, compared to other token standards such as the Ethereum’s ERC-721. We show how to add smart contract capabilities to Ordinals, broadening the spectrum of its…

In our previous article, we presented a cross-chain atomic swap implementation using Hash Time Locked Contracts (HTLCs). Today, we introduce an alternative approach for implementing it without HTLCs. This extends atomic swaps to blockchains lacking hash locks and time locks. Using SPV to Prove a Transaction is Mined Let us swap Alice’s BTC coins with Bob’s BSV coins…

We have executed the first atomic swap between Bitcoin SV and Bitcoin Core. This achievement represents a major advancement for Bitcoin SV, fostering seamless interoperability with other blockchains in a trustless manner. In a previous article, we have explained the high-level theory of atomic swaps. We delve into a practical…