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db: Move statement expansion into the driver

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It's better to let the driver decide when and how to expand. It can then
report the expanded statement back to the dispatch through the
`db_changes_add` function.

Signed-off-by: Christian Decker <decker.christian@gmail.com>
This commit is contained in:
Christian Decker
2019-08-28 16:25:42 +02:00
committed by Rusty Russell
parent b6d583c26a
commit 742bcdb2bc
3 changed files with 50 additions and 52 deletions
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14
wallet/db_common.h
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@@ -93,10 +93,6 @@ struct db_config {
struct db_query *queries;
size_t num_queries;
/* Function used to get a string representation of the executed query
* for the `db_write` plugin hook. */
const char *(*expand_fn)(struct db_stmt *stmt);
/* Function used to execute a statement that doesn't result in a
* response. */
bool (*exec_fn)(struct db_stmt *stmt);
@@ -139,4 +135,14 @@ struct db_config {
/* Provide a way for DB backends to register themselves */
AUTODATA_TYPE(db_backends, struct db_config);
/**
* Report a statement that changes the wallet
*
* Allows the DB driver to report an expanded statement during
* execution. Changes are queued up and reported to the `db_write` plugin hook
* upon committing.
*/
void db_changes_add(struct db_stmt *db_stmt, const char * expanded);
#endif /* LIGHTNING_WALLET_DB_COMMON_H */