From 7538d6f2463ff95838e1104a75fbbadd78ef362e Mon Sep 17 00:00:00 2001
From: David Duong <david@duong.cz>
Date: Thu, 16 Nov 2023 23:52:56 +0100
Subject: [PATCH] Fix broken fetch usage for CFW (#3302)

Fixes #3187
---
 langchain/src/chat_models/bedrock/web.ts | 2 +-
 langchain/src/llms/bedrock/web.ts        | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/langchain/src/chat_models/bedrock/web.ts b/langchain/src/chat_models/bedrock/web.ts
index 9c530adfbdd2..849bc25c2dc3 100644
--- a/langchain/src/chat_models/bedrock/web.ts
+++ b/langchain/src/chat_models/bedrock/web.ts
@@ -167,7 +167,7 @@ export class BedrockChat extends SimpleChatModel implements BaseBedrockInput {
 
     this.temperature = fields?.temperature ?? this.temperature;
     this.maxTokens = fields?.maxTokens ?? this.maxTokens;
-    this.fetchFn = fields?.fetchFn ?? fetch;
+    this.fetchFn = fields?.fetchFn ?? fetch.bind(globalThis);
     this.endpointHost = fields?.endpointHost ?? fields?.endpointUrl;
     this.stopSequences = fields?.stopSequences;
     this.modelKwargs = fields?.modelKwargs;
diff --git a/langchain/src/llms/bedrock/web.ts b/langchain/src/llms/bedrock/web.ts
index 36f010216415..f20379c8eea7 100644
--- a/langchain/src/llms/bedrock/web.ts
+++ b/langchain/src/llms/bedrock/web.ts
@@ -106,7 +106,7 @@ export class Bedrock extends LLM implements BaseBedrockInput {
 
     this.temperature = fields?.temperature ?? this.temperature;
     this.maxTokens = fields?.maxTokens ?? this.maxTokens;
-    this.fetchFn = fields?.fetchFn ?? fetch;
+    this.fetchFn = fields?.fetchFn ?? fetch.bind(globalThis);
     this.endpointHost = fields?.endpointHost ?? fields?.endpointUrl;
     this.stopSequences = fields?.stopSequences;
     this.modelKwargs = fields?.modelKwargs;