fix(core): Serialize BigInts (n8n-io#6805)

* workaround for non-serializable BigInt * refactor
cg9x11 · Jul 31, 2023 · 7b27fa5 · 7b27fa5
1 parent 651cf34
commit 7b27fa5
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diff --git a/packages/workflow/src/types.d.ts b/packages/workflow/src/types.d.ts
@@ -12,3 +12,7 @@ declare module '@n8n_io/riot-tmpl' {
 	let brackets: Brackets;
 	let tmpl: Tmpl;
 }
+
+interface BigInt {
+	toJSON(): string;
+}
diff --git a/packages/workflow/src/utils.ts b/packages/workflow/src/utils.ts
@@ -3,6 +3,12 @@ import type { BinaryFileType, JsonObject } from './Interfaces';
 
 const readStreamClasses = new Set(['ReadStream', 'Readable', 'ReadableStream']);
 
+// NOTE: BigInt.prototype.toJSON is not available, which causes JSON.stringify to throw an error
+// as well as the flatted stringify method. This is a workaround for that.
+BigInt.prototype.toJSON = function () {
+	return this.toString();
+};
+
 export const isObjectEmpty = (obj: object | null | undefined): boolean => {
 	if (obj === undefined || obj === null) return true;
 	if (typeof obj === 'object') {