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257ecf6222
Not the nicest code, but it allows us to store the bip32_max_index so that we don't forget our addresses upon restart. We could have done the same by retrieving the max index from our index, but then we'd forget addresses that don't have an associated output. Conversion to/from string is so that we can store arbitrary one off values in the DB in the future, independent of type.
77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
#ifndef WALLET_DB_H
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#define WALLET_DB_H
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#include "config.h"
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#include "daemon/log.h"
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#include <sqlite3.h>
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#include <stdbool.h>
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struct db {
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char *filename;
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bool in_transaction;
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const char *err;
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sqlite3 *sql;
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};
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/**
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* db_setup - Open a the lightningd database and update the schema
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*
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* Opens the database, creating it if necessary, and applying
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* migrations until the schema is updated to the current state.
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*
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* Params:
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* @ctx: the tal_t context to allocate from
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* @log: where to log messages to
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*/
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struct db *db_setup(const tal_t *ctx);
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/**
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* db_query - Prepare and execute a query, and return the result
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*/
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sqlite3_stmt *PRINTF_FMT(3, 4)
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db_query(const char *caller, struct db *db, const char *fmt, ...);
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bool PRINTF_FMT(3, 4)
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db_exec(const char *caller, struct db *db, const char *fmt, ...);
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/**
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* db_begin_transaction - Begin a transaction
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*
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* We do not support nesting multiple transactions, so make sure that
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* we are not in a transaction when calling this. Returns true if we
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* succeeded in starting a transaction.
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*/
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bool db_begin_transaction(struct db *db);
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/**
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* db_commit_transaction - Commit a running transaction
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*
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* Requires that we are currently in a transaction. Returns whether
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* the commit was successful.
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*/
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bool db_commit_transaction(struct db *db);
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/**
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* db_rollback_transaction - Whoops... undo! undo!
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*/
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bool db_rollback_transaction(struct db *db);
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/**
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* db_set_intvar - Set an integer variable in the database
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*
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* Utility function to store generic integer values in the
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* database.
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*/
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bool db_set_intvar(struct db *db, char *varname, s64 val);
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/**
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* db_get_intvar - Retrieve an integer variable from the database
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*
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* Either returns the value in the database, or @defval if
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* the query failed or no such variable exists.
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*/
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s64 db_get_intvar(struct db *db, char *varname, s64 defval);
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#endif /* WALLET_DB_H */
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