From 343c426af10cb6481a01ee8d8c66bdd5f869d4d5 Mon Sep 17 00:00:00 2001
From: Joao Andrade <sousa.andrade.joao@gmail.com>
Date: Thu, 30 May 2024 16:48:48 +0100
Subject: [PATCH] fix: include the cause field

---
 w3-blob.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/w3-blob.md b/w3-blob.md
index aa6f105..6cbeff4 100644
--- a/w3-blob.md
+++ b/w3-blob.md
@@ -823,6 +823,8 @@ Shows an example receipt for the above `/space/content/get/blob` capability invo
     "ran": { "/": "bafy..get" },
     "out": {
       "ok": {
+        // task that caused this invocation
+        "cause": { "/": "bafy..add" }
         "blob": {
           "size": 100,
           "content": { "/": { "bytes": "mEi...sfKg" } },
@@ -867,6 +869,7 @@ type GetBlobReceipt = {
 }
 
 type GetBlobOk = {
+  cause:  Link<Task>
   blob: blob
 }
 
@@ -877,6 +880,10 @@ type GetBlobError = {
 }
 ```
 
+#### Get Cause
+
+The `args.cause` field MUST be set to the [Link] for the task, that caused a get.
+
 ##### Get Blob Effects
 
 Receipt MUST not have any effects.