From 29e4db3a1dd0fedb67731c9df5ca1edb4b5869b5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matheus=20L=C3=A1zaro?= <matheus.lazaro@discente.ufg.br>
Date: Thu, 4 Jul 2024 20:23:48 -0300
Subject: [PATCH 1/2] Correction of the getBlockByHash function - QueryQSCC
 Handler: hashBytes, err := hex.DecodeString(hash), passed as a parameter to
 the chaincode.QueryGateway function, assigned to result.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Matheus Lázaro <matheus.lazaro@discente.ufg.br>
---
 ccapi/handlers/qscc.go | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/ccapi/handlers/qscc.go b/ccapi/handlers/qscc.go
index 22a486d..d999d39 100644
--- a/ccapi/handlers/qscc.go
+++ b/ccapi/handlers/qscc.go
@@ -4,7 +4,7 @@ import (
 	"encoding/hex"
 	"fmt"
 	"net/http"
-
+	
 	"github.com/gin-gonic/gin"
 	"github.com/hyperledger-labs/ccapi/chaincode"
 	"github.com/hyperledger-labs/ccapi/common"
@@ -24,8 +24,8 @@ func QueryQSCC(c *gin.Context) {
 	switch txname {
 	case "getBlockByNumber":
 		getBlockByNumber(c, channelName)
-	// case "getBlockByHash":
-	// 	getBlockByHash(c, channelName)
+	case "getBlockByHash":
+	getBlockByHash(c, channelName)
 	case "getTransactionByID":
 		getTransactionByID(c, channelName)
 	case "getChainInfo":
@@ -139,7 +139,15 @@ func getBlockByHash(c *gin.Context, channelName string) {
 		return
 	}
 
-	result, err := chaincode.QueryGateway(channelName, "qscc", "GetBlockByHash", user, []string{channelName, hash})
+	hashBytes, err := hex.DecodeString(hash)
+
+	if err != nil {
+		common.Abort(c, http.StatusBadRequest, fmt.Errorf("invalid hash format: %s", hash))
+		return
+	}
+
+	result, err := chaincode.QueryGateway(channelName, "qscc", "GetBlockByHash", user, []string{channelName, string(hashBytes)})
+	
 	if err != nil {
 		err, status := common.ParseError(err)
 		common.Abort(c, status, err)
@@ -440,4 +448,4 @@ func decodeProcessedTransaction(t []byte) (map[string]interface{}, error) {
 	}
 
 	return processedTransactionMap, nil
-}
+}
\ No newline at end of file

From dc740e5a7d1866b44ba8ce971b9447e97436d014 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matheus=20L=C3=A1zaro?= <matheus.lazaro@discente.ufg.br>
Date: Sun, 7 Jul 2024 18:57:58 -0300
Subject: [PATCH 2/2] Correction in the Swagger documentation for the
 getBlockByHash function - QueryQSCC Handler: hashBytes, err :=
 hex.DecodeString(hash), passed as a parameter to the chaincode.QueryGateway
 function, assigned to the result.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Matheus Lázaro <matheus.lazaro@discente.ufg.br>
---
 ccapi/docs/swagger.yaml | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/ccapi/docs/swagger.yaml b/ccapi/docs/swagger.yaml
index 074cb7b..ca2113b 100644
--- a/ccapi/docs/swagger.yaml
+++ b/ccapi/docs/swagger.yaml
@@ -947,6 +947,42 @@ paths:
         - application/json
       produces:
         - application/json
+  /{channelName}/qscc/getBlockByHash:
+    get:
+      summary: Get block by hash
+      description: Retrieves a block by its hash from the specified channel.
+      tags:
+        - Blockchain
+      security:
+        - basicAuth: []
+      parameters:
+        - name: channelName
+          in: path
+          required: true
+          schema:
+            type: string
+            example: mainchannel
+          description: Name of the channel.
+        - name: hash
+          in: query
+          required: true
+          schema:
+            type: string
+            example: dbd2b14fb3d61b7aeac3add76f99cd9b47850c7c95ca5e489696a6b543fc6b2d
+          description: The hash of the block to be retrieved.
+      responses:
+        "200":
+          description: Successful response
+          content:
+            application/json:
+              schema:
+                type: object
+        "400":
+          description: Bad request
+        "404":
+          description: Block not found
+        "500":
+          description: Internal server error
   /{channelName}/qscc/getChainInfo:
     get:
       summary: Get chain info