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refactor: use SqlDelight for database implementation instead of Exposed
Expose is a JVM only lib. SqlDelight provides KMP support out of the box. This migrates the internal db implementation to SqlDelight. Work towards resolving issue #3.
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44 changes: 0 additions & 44 deletions
44
lib/src/main/kotlin/me/tb/cashuclient/db/DBBolt11Payment.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,43 +1,57 @@ | ||
| package me.tb.cashuclient.db | ||
|
|
||
| import app.cash.sqldelight.db.SqlDriver | ||
| import app.cash.sqldelight.driver.jdbc.sqlite.JdbcSqliteDriver | ||
| import fr.acinq.lightning.utils.getValue | ||
| import me.tb.cashuclient.types.Proof | ||
| import org.jetbrains.exposed.sql.SchemaUtils | ||
| import org.jetbrains.exposed.sql.SqlExpressionBuilder.eq | ||
| import org.jetbrains.exposed.sql.deleteWhere | ||
| import org.jetbrains.exposed.sql.insert | ||
| import org.jetbrains.exposed.sql.selectAll | ||
| import org.jetbrains.exposed.sql.transactions.transaction | ||
| import me.tb.cashulib.Database | ||
|
|
||
| /** | ||
| * The default implementation of the [CashuDB] interface, using SQLite. | ||
| */ | ||
| public class SQLiteDB : CashuDB { | ||
| override fun insertProof(proof: Proof) { | ||
| transaction(DBSettings.db) { | ||
| SchemaUtils.create(DBProof) | ||
|
|
||
| DBProof.insert { | ||
| it[amount] = proof.amount | ||
| it[secret] = proof.secret | ||
| it[C] = proof.C | ||
| it[id] = proof.id | ||
| it[script] = null | ||
| } | ||
| public class SQLiteDB( | ||
| private val sqlDriver: SqlDriver = sqlDriver() | ||
| ) : CashuDB { | ||
|
|
||
| private val database by lazy { | ||
| Database.Schema.create(sqlDriver) | ||
| Database(sqlDriver) | ||
| } | ||
|
|
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| override fun proofsForAmounts(amounts: List<ULong>): List<Proof> { | ||
| return amounts.map { amt -> | ||
| val record = database.proofQueries.selectProofByAmount(amt.toLong()).executeAsOne() | ||
| Proof( | ||
| amount = record.amount.toULong(), | ||
| secret = record.secret, | ||
| C = record.C, | ||
| id = record.id | ||
| ) | ||
| } | ||
| } | ||
|
|
||
| override fun insertProof(proof: Proof) { | ||
| database.proofQueries.insert( | ||
| amount = proof.amount.toLong(), | ||
| secret = proof.secret, | ||
| C = proof.C, | ||
| id = proof.id, | ||
| script = proof.script | ||
| ) | ||
| } | ||
|
|
||
| override fun deleteProof(proof: Proof) { | ||
| transaction(DBSettings.db) { | ||
| SchemaUtils.create(DBProof) | ||
| val secretOfProofToDelete = proof.secret | ||
| DBProof.deleteWhere { secret eq secretOfProofToDelete } | ||
| } | ||
| database.proofQueries.deleteById(proof.id) | ||
| } | ||
|
|
||
| override fun spendableNoteSizes(): List<ULong> { | ||
| return transaction(DBSettings.db) { | ||
| SchemaUtils.create(DBProof) | ||
| DBProof.selectAll().map { it[DBProof.amount] } | ||
| } | ||
| return database.proofQueries.selectAll().executeAsList().map { it.amount.toULong() } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * Creates a new [SqlDriver] instance that connects to the SQLite database. | ||
| */ | ||
| private fun sqlDriver(): SqlDriver { | ||
| return JdbcSqliteDriver(url = "jdbc:sqlite:./cashu.sqlite3") | ||
| } |
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12 changes: 12 additions & 0 deletions
12
lib/src/main/sqldelight/me/tb/cashuclient/Bolt11Payment.sq
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| -- A table to store payment requests made by the mint. | ||
| -- Once paid, these will later be used to request tokens. | ||
| CREATE TABLE Bolt11Payment( | ||
| -- The hash here is really just a secret payment ID used to identify the payment between the mint and the client. | ||
| hash TEXT NOT NULL PRIMARY KEY, | ||
| pr TEXT NOT NULL, | ||
| value INTEGER NOT NULL | ||
| ); | ||
|
|
||
| -- Using a hash as the identifier for an amount requested and invoice paid, return said amount | ||
| getAmountByHash: | ||
| SELECT value FROM Bolt11Payment WHERE hash = ?; |
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