feat: deno ffi bindings (#40)

* initial ts commit
* monero.ts improvements
* test on latest, build on debian:bookworm
* feat: upstream changes to bindings
* chore: update checksums
* feat: allow manually loading dylib
* chore: add readme
* fix: free strings after being read to prevent potential memory leaks
* fix: load dylib
* fix: checksum checks segfaulting because of freeing const variables

---------

Co-authored-by: Mateusz Franik <47059999+Im-Beast@users.noreply.github.com>
Co-authored-by: Im-Beast <franik.mateusz@gmail.com>

1 files changed, 81 insertions, 0 deletions

diff --git a/impls/monero.ts/src/pending_transaction.ts b/impls/monero.ts/src/pending_transaction.ts
new file mode 100644
index 0000000..cf48721
--- /dev/null
+++ b/impls/monero.ts/src/pending_transaction.ts
@@ -0,0 +1,81 @@
+import { dylib } from "./bindings.ts";
+import { CString, readCString, type Sanitizer } from "./utils.ts";
+
+export type PendingTransactionPtr = Deno.PointerObject<"transactionInfo">;
+
+export class PendingTransaction {
+  #pendingTxPtr: PendingTransactionPtr;
+  sanitizer?: Sanitizer;
+
+  constructor(pendingTxPtr: PendingTransactionPtr, sanitizer?: Sanitizer) {
+    this.sanitizer = sanitizer;
+    this.#pendingTxPtr = pendingTxPtr;
+  }
+
+  async status(): Promise<number> {
+    return await dylib.symbols.MONERO_PendingTransaction_status(this.#pendingTxPtr);
+  }
+
+  async errorString(): Promise<string | null> {
+    if (!await this.status()) return null;
+
+    const error = await dylib.symbols.MONERO_PendingTransaction_errorString(this.#pendingTxPtr);
+    if (!error) return null;
+
+    return await readCString(error) || null;
+  }
+
+  async throwIfError(sanitize = true): Promise<void> {
+    const maybeError = await this.errorString();
+    if (maybeError) {
+      if (sanitize) this.sanitizer?.();
+      throw new Error(maybeError);
+    }
+  }
+
+  async commit(fileName: string, overwrite: boolean, sanitize = true): Promise<boolean> {
+    const bool = await dylib.symbols.MONERO_PendingTransaction_commit(
+      this.#pendingTxPtr,
+      CString(fileName),
+      overwrite,
+    );
+    await this.throwIfError(sanitize);
+    return bool;
+  }
+
+  async commitUR(maxFragmentLength: number): Promise<string | null> {
+    const result = await dylib.symbols.MONERO_PendingTransaction_commitUR(
+      this.#pendingTxPtr,
+      maxFragmentLength,
+    );
+    if (!result) return null;
+    await this.throwIfError();
+    return await readCString(result) || null;
+  }
+
+  async amount(): Promise<bigint> {
+    return await dylib.symbols.MONERO_PendingTransaction_amount(this.#pendingTxPtr);
+  }
+
+  async dust(): Promise<bigint> {
+    return await dylib.symbols.MONERO_PendingTransaction_dust(this.#pendingTxPtr);
+  }
+
+  async fee(): Promise<bigint> {
+    return await dylib.symbols.MONERO_PendingTransaction_fee(this.#pendingTxPtr);
+  }
+
+  async txid(separator: string, sanitize = true): Promise<string | null> {
+    const result = await dylib.symbols.MONERO_PendingTransaction_txid(
+      this.#pendingTxPtr,
+      CString(separator),
+    );
+    if (!result) return null;
+    await this.throwIfError(sanitize);
+    return await readCString(result) || null;
+  }
+
+  async txCount(): Promise<bigint> {
+    return await dylib.symbols.MONERO_PendingTransaction_txCount(this.#pendingTxPtr);
+  }
+}