medium10 pts · first answer countsdapp-frontendthe-graph

Showing a user's history

A dApp needs a fast, searchable list of every trade a user made across a year. What is the usual approach?

A.Loop over all blocks from the browser and read each transactionB.Store the history in a contract array and read it with a view functionC.Ask Etherscan to email the dataD.Index the contract's events with a subgraph (The Graph) or a custom indexer, and query that from the frontend

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Showing a user's history

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