# Refund Snapshot

The chain creates a refund snapshot before every unlock of a fragment to be included in the outputs. The judge queries the refund snapshot to create the refund tx.

```protobuf
message RefundTxSnapshot {
    uint64 ReserveId = 1;
    uint64 RoundId = 2;
    repeated RefundTxAccountSnap refundAccounts = 3;
    int64 EndBlockerHeightTwilight = 4;
    
message RefundTxAccountSnap {
    uint64 Amount = 1;
    string BtcDepositAddress = 2;
    uint32 BtcDepositAddressIdentifier = 3; 
```


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.twilight.org/boomerang/refund-snapshot.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.