Fix getBlobs() in Util, remove size limitation in example

Author: holgerd77

packages/util/examples/blobs.ts

@@ -15,10 +15,10 @@ const kzg = new microEthKZG(trustedSetup)
 
 // Use with node ./examples/blobs.ts <file path>
 const filePath = process.argv[2]
-let blobData: string = fs.readFileSync(filePath, 'ascii')
+const blobData: string = fs.readFileSync(filePath, 'ascii')
 console.log(blobData)
 console.log(blobData.length)
-blobData = blobData.substring(0, 100)
+//blobData = blobData.substring(0, 100)
 
 const blobs = [getBlob(hexToBytes(`0x${blobData}`))]
 

packages/util/src/blobs.ts

@@ -40,7 +40,7 @@ export function getBlob(data: Uint8Array): PrefixedHexString {
   const blob = new Uint8Array(BLOB_SIZE)
   for (let i = 0; i < FIELD_ELEMENTS_PER_BLOB; i++) {
     const chunk = new Uint8Array(32)
-    chunk.set(data.subarray(i * 31, (i + 1) * 31), 0)
+    chunk.set(data.subarray(i * 32, (i + 1) * 32), 0)
     blob.set(chunk, i * 32)
   }