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fix: correctly detect when the DB is empty

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This commit is contained in:
Jude Nelson
2023-01-24 10:46:25 -05:00
parent fb9a08f6ab
commit fd322779aa
1 changed files with 3 additions and 10 deletions
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13
src/burnchains/bitcoin/spv.rs
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@@ -314,7 +314,7 @@ impl SpvClient {
tx.execute_batch(row_text).map_err(db_error::SqliteError)?;
}
SpvClient::db_set_version(&tx, "2")?;
SpvClient::db_set_version(&tx, "3")?;
tx.commit().map_err(db_error::SqliteError)?;
}
SPV_DB_VERSION => {
@@ -660,7 +660,7 @@ impl SpvClient {
pub fn get_highest_header_height(&self) -> Result<u64, btc_error> {
match query_row::<u64, _>(
&self.headers_db,
"SELECT MAX(height) FROM headers",
"SELECT IFNULL(MAX(height),0) FROM headers",
NO_PARAMS,
)? {
Some(max) => Ok(max),
@@ -670,14 +670,7 @@ impl SpvClient {
/// Is the DB devoid of headers? Used during migrations
pub fn is_empty(&self) -> Result<bool, btc_error> {
match query_row::<BlockHeader, _>(
&self.headers_db,
"SELECT * FROM headers LIMIT 1",
NO_PARAMS,
)? {
Some(_) => Ok(true),
None => Ok(false),
}
Ok(self.get_highest_header_height()? == 0)
}
/// Read the block header at a particular height