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An odds response can contain useful prices and missing coverage at the same time. Inspect both before treating a market as complete.

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Partial results are meaningful

An application might receive home and away prices while the draw is unavailable. A list of prices alone does not tell the caller whether this is a two-outcome market or an incomplete three-outcome offer.

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Preserve the reason

A source can be uncollected, unavailable, stale, suspended, denied, or incompatible with a reviewed comparison. These states call for different decisions. Display missing coverage explicitly and withhold calculations that require a complete vector.

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Keep control reads separate

Read coverage and entitlement information before issuing a large data query. On the current contract, account/control reads and errors are free. A successfully delivered metered data page uses one credit, including an empty result. Follow the credit and error rules.

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Check your implementation

Exercise empty and partial responses, expired quotes, and suspended markets. Use the documented native identity fields and retain missing reasons through your own interface. Read the odds reference, settlement guide, and freshness article.