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, 104 insertions, 0 deletions

diff --git a/impls/monero.ts/src/transaction_info.ts b/impls/monero.ts/src/transaction_info.ts
new file mode 100644
index 0000000..7db45f5
--- /dev/null
+++ b/impls/monero.ts/src/transaction_info.ts
@@ -0,0 +1,104 @@
+import { dylib } from "./bindings.ts";
+import { readCString, Sanitizer } from "./utils.ts";
+
+export type TransactionInfoPtr = Deno.PointerObject<"transactionInfo">;
+
+export class TransactionInfo {
+  #txInfoPtr: TransactionInfoPtr;
+  sanitizer?: Sanitizer;
+
+  constructor(txInfoPtr: TransactionInfoPtr, sanitizer?: Sanitizer) {
+    this.#txInfoPtr = txInfoPtr;
+    this.sanitizer = sanitizer;
+  }
+
+  async direction(): Promise<"in" | "out"> {
+    switch (await dylib.symbols.MONERO_TransactionInfo_direction(this.#txInfoPtr)) {
+      case 0:
+        return "in";
+      case 1:
+        return "out";
+      default:
+        await this.sanitizer?.();
+        throw new Error("Invalid TransactionInfo direction");
+    }
+  }
+
+  async isPending(): Promise<boolean> {
+    return await dylib.symbols.MONERO_TransactionInfo_isPending(this.#txInfoPtr);
+  }
+
+  async isFailed(): Promise<boolean> {
+    return await dylib.symbols.MONERO_TransactionInfo_isFailed(this.#txInfoPtr);
+  }
+
+  async isCoinbase(): Promise<boolean> {
+    return await dylib.symbols.MONERO_TransactionInfo_isCoinbase(this.#txInfoPtr);
+  }
+
+  async amount(): Promise<bigint> {
+    return await dylib.symbols.MONERO_TransactionInfo_amount(this.#txInfoPtr);
+  }
+
+  async fee(): Promise<bigint> {
+    return await dylib.symbols.MONERO_TransactionInfo_fee(this.#txInfoPtr);
+  }
+
+  async blockHeight(): Promise<bigint> {
+    return await dylib.symbols.MONERO_TransactionInfo_blockHeight(this.#txInfoPtr);
+  }
+
+  async description(): Promise<string> {
+    const description = await dylib.symbols.MONERO_TransactionInfo_description(this.#txInfoPtr);
+    return await readCString(description) || "";
+  }
+
+  async subaddrIndex(): Promise<string> {
+    const subaddrIndex = await dylib.symbols.MONERO_TransactionInfo_subaddrIndex(this.#txInfoPtr);
+    return await readCString(subaddrIndex) || "";
+  }
+
+  async subaddrAccount(): Promise<number> {
+    return await dylib.symbols.MONERO_TransactionInfo_subaddrAccount(this.#txInfoPtr);
+  }
+
+  async label(): Promise<string> {
+    const label = await dylib.symbols.MONERO_TransactionInfo_label(this.#txInfoPtr);
+    return await readCString(label) || "";
+  }
+
+  async confirmations(): Promise<bigint> {
+    return await dylib.symbols.MONERO_TransactionInfo_confirmations(this.#txInfoPtr);
+  }
+
+  async unlockTime(): Promise<bigint> {
+    return await dylib.symbols.MONERO_TransactionInfo_unlockTime(this.#txInfoPtr);
+  }
+
+  async hash(): Promise<string> {
+    const hash = await dylib.symbols.MONERO_TransactionInfo_hash(this.#txInfoPtr);
+    return await readCString(hash) || "";
+  }
+
+  async timestamp(): Promise<bigint> {
+    return await dylib.symbols.MONERO_TransactionInfo_timestamp(this.#txInfoPtr);
+  }
+
+  async paymentId(): Promise<string> {
+    const paymentId = await dylib.symbols.MONERO_TransactionInfo_paymentId(this.#txInfoPtr);
+    return await readCString(paymentId) || "";
+  }
+
+  async transfersCount(): Promise<number> {
+    return await dylib.symbols.MONERO_TransactionInfo_transfers_count(this.#txInfoPtr);
+  }
+
+  async transfersAmount(index: number): Promise<bigint> {
+    return await dylib.symbols.MONERO_TransactionInfo_transfers_amount(this.#txInfoPtr, index);
+  }
+
+  async transfersAddress(index: number): Promise<string> {
+    const transfersAddress = await dylib.symbols.MONERO_TransactionInfo_transfers_address(this.#txInfoPtr, index);
+    return await readCString(transfersAddress) || "";
+  }
+}