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import { Database, QueryResult } from "duckdb"; | ||
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export class DatasetStore { | ||
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private readonly db; | ||
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constructor() { | ||
this.db = new Database(':memory:'); | ||
}; | ||
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static async connect(): Promise<DatasetStore> { | ||
return new DatasetStore(); | ||
}; | ||
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newBlockEventsIds = () => { | ||
var con = this.db.connect(); | ||
return new Promise((resolve) => { | ||
con.all( | ||
"SELECT ID FROM READ_PARQUET('events/new_block/canonical/*.parquet')", | ||
(err: any, result: any) => { | ||
if (err) { | ||
throw err; | ||
} | ||
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let res = result.map((a: any) => a.id); // extract IDs as an Array | ||
resolve(res); | ||
} | ||
); | ||
}); | ||
}; | ||
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newBlockEventsOrderedPayloadStream = (): Promise<QueryResult> => { | ||
return new Promise(async (resolve) => { | ||
var con = this.db.connect(); | ||
const res = con.stream( | ||
"SELECT payload FROM READ_PARQUET('events/new_block/canonical/*.parquet') ORDER BY id", | ||
); | ||
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resolve(res); | ||
}); | ||
}; | ||
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newBurnBlockEventsOrdered = () => { | ||
return new Promise((resolve) => { | ||
var con = this.db.connect(); | ||
con.all( | ||
"SELECT * FROM READ_PARQUET('events/new_burn_block/canonical/*.parquet') ORDER BY id", | ||
(err: any, result: any) => { | ||
if (err) { | ||
throw err; | ||
} | ||
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resolve(result); | ||
} | ||
); | ||
}); | ||
}; | ||
}; |