Use eth-blob-uploader to upload files via blobs

Introduction

In this tutorial, we will demonstrate how to upload an image using the eth-blob-uploader tool. The image will be uploaded to the blockchain using EIP-4844 blob transaction.

Installation

If you have not already done so, you can install eth-blob-uploader using the following command:

npm i -g eth-blob-uploader

Basic Operation

Basically, you can upload the file using the following syntax:

eth-blob-uploader -r <rpc> -p <private-key> -f <file-path> -t <to-address>

In the following example, you will upload the file img.jpeg to the address 0xaa... using the private key 0x...a7 via RPC http://...rpc.io.

eth-blob-uploader -r http://...rpc.io -p 0x...a7 -f /Users/test/img.jpeg -t 0xaa...

More Options

If the to-address is a smart contract, you will need to pass in calldata using -d.

// eth-blob-uploader -r <rpc> -p <private-key> -f <file-path> -t <to-address> -d [data]
eth-blob-uploader -r http://...rpc.io -p 0x...a7 -f /Users/test/img.jpeg -t 0xbb... -d 0x...11

You can specify the number of blobs that come with a transaction using -c, with default value set to 3.

// eth-blob-uploader -r <rpc> -p <private-key> -f <file-path>  -t <to-address> -c [blob-counts]
eth-blob-uploader -r https://...rpc.io -p 0x...a7 -f /Users/test/img.jpeg -t 0xaa... -c 2

You can also override the pending transaction by passing in parameters such as nonce(-n) and gas(-g for transaction gas and -b for blob gas).

// eth-blob-uploader -r <rpc> -p <private-key> -f <file-path> -t <to-address> -n [nonce] -g [gas] -b [blob-gas]
eth-blob-uploader -r http://...rpc.io -p 0x...a7 -f /Users/test/img.jpeg -t 0xaa... -n 1 -g 1000000000 -b 2000000000