Crypto Sportsbooks' 'On-Chain' Claims Exposed: Separating Fact from Hype

Crypto sportsbooks claim to offer on-chain settlement and odds, but what does this really mean? When a crypto sportsbook says it's 'on-chain', it usually refers to recording the resolved outcome and payout on a public ledger. However, the price of the bet was often determined off-chain by the operator.

Deriving live sports odds from contract logic is not feasible at scale due to practical constraints. Three main reasons contribute to this: continuous data requirements, trader judgment, and proprietary models. Operators need access to real-time data feeds, which are too expensive and time-consuming to process through a public chain. Traders also add value by adjusting for information that may not be reflected in the model, setting margins against expected exposure.

Most platforms use a hybrid architecture: recording settlement on-chain while pricing odds off-chain. Dexsport is an example of this approach. On-chain settlement provides several benefits, including an independent record, dispute resolution, and external measurability. However, it's essential to note that on-chain settlement does not guarantee fair prices or prove the price you accepted was reasonable.

Bettors can use the settlement record as a tool for verification. It's recommended to retrieve a settlement early on, learn where the record lives, and compare odds with other books on the same market. Responsible gambling practices remain unchanged regardless of whether a platform records settlement on-chain or not.