Batch Auctions & Dutch Auctions

Not All Trades Settle the Same Way

Most people picture trading as continuous: orders match one at a time, instantly, at whatever the current price is. But that continuous model is exactly what enables a lot of predatory behaviour on blockchains — because bots can see and react to individual pending trades (front-running, sandwiching). Auction-based settlement offers alternatives. A batch auction collects many orders over a short window and settles them together at a single, shared price, rather than one by one. A Dutch auction starts at a high price and lowers it over time until buyers step in, discovering the price by descent rather than by bidding up. Both are old, well-understood auction designs that crypto has adopted to solve specific problems that continuous trading handles poorly.

Why Crypto Reached for Auctions

Auctions solve two crypto pain points especially well. First, fairness against front-running: if many orders settle together at one price (batch auction), there's no advantage to being milliseconds earlier or reordering trades, which neutralises the sandwiching and ordering games that plague continuous on-chain trading. Second, fair price discovery for launches and liquidations: Dutch auctions let a token sale or an asset liquidation find a market-clearing price without needing to guess it upfront, and without the 'gas war' scramble that fixed-price launches trigger. So auctions aren't a nostalgic detour — they're targeted tools that address MEV/front-running and price-discovery problems that continuous mechanisms make worse in a transparent, bot-heavy environment.

• Continuous trading (order-by-order) enables front-running and sandwiching on-chain
• A batch auction settles many orders together at one shared clearing price
• A Dutch auction starts high and lowers the price until buyers accept
• Crypto uses both to fight front-running and to discover fair prices