fix: added bigint-buffer-guard to sdk-coin-sol

Ticket: DX-1549

Author: tanjeemh

modules/sdk-coin-sol/src/bigint-buffer-guard.ts

@@ -0,0 +1,28 @@
+try {
+  const mod = require('bigint-buffer');
+  const le = typeof mod.toBigIntLE === 'function' ? mod.toBigIntLE : undefined;
+  const be = typeof mod.toBigIntBE === 'function' ? mod.toBigIntBE : undefined;
+
+  const isBufferLike = (b: unknown) => (typeof Buffer !== 'undefined' && Buffer.isBuffer(b)) || b instanceof Uint8Array;
+
+  const byteLen = (b: any) =>
+    typeof Buffer !== 'undefined' && Buffer.isBuffer(b) ? b.length : (b as Uint8Array).byteLength;
+
+  const assertBuf = (b: unknown) => {
+    if (!isBufferLike(b)) throw new TypeError('toBigInt*: input must be Buffer/Uint8Array');
+    if (byteLen(b as any) > 1_000_000) throw new RangeError('toBigInt*: buffer too large');
+  };
+
+  if (le)
+    mod.toBigIntLE = (buf: Buffer | Uint8Array) => {
+      assertBuf(buf);
+      return le(buf);
+    };
+  if (be)
+    mod.toBigIntBE = (buf: Buffer | Uint8Array) => {
+      assertBuf(buf);
+      return be(buf);
+    };
+} catch {
+  /* noop */
+}

modules/sdk-coin-sol/src/index.ts

@@ -1,3 +1,4 @@
+import './bigint-buffer-guard';
 export * from './lib';
 export * from './sol';
 export * from './solToken';