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# Request: GET_XTHIN
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2020-11-04 10:28:50 -05:00
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Request the [`XTHINBLOCK`](xthinblock) from the peer that was anoounced via the previous [`INV`](..\network\messages\inv) message.
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The message should start with an inventory message that indicates the `XTHINBLOCK` requested, followed by the Bloom filter generated from the mempool.
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Upon receipt of this request, the peer should loads the attached Bloom filter, creates and responds with `XTHINBLOCK`.
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If the `XTHINBLOCK` cannot be created without hash collisions, the peer may repond with `THINBLOCK` or full blocks.
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2020-10-27 16:27:35 -04:00
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2021-02-24 17:53:28 +01:00
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## Format
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2020-10-27 16:27:35 -04:00
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| Field | Length | Format | Description |
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|--|--|--|--|
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2020-11-04 10:28:50 -05:00
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| inventory message | variable | inventory message | An inventory message of type MSG_XTHINBLOCK.|
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| Bloom filter | varaible | serialized object | A serialized Bloom filter seeded with contents of the mempool.|
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