Is there a way to upload the Image or the PDF of the Screenshot document mentioned?

[pratiksharma1619]

Is there a way to upload the scanned image or the PDF into the blockchain network? Or we could probably make a hash (like IPFS or so) of the file and put the hash into the blockchain network.

What I saw in submitFairTradeData is that you are inserting the data from your side

[horeaporutiu]

@pratiksharma1619 Thanks for opening this. I will look into this and get back to you.

[pratiksharma1619]

@horeaporutiu Can Base64 encoding of the image file be a solution for it? What would be its pros and cons if implemented?

[0xthreebody]

@pratiksharma1619 upload the image to IPFS, post the Hash to blockchain. Note: need to let the IPFS dont delete the file, such as use the "pin" method.

[horeaporutiu]

@jiangfuyao Thanks for the comment. Really good solution.

@pratiksharma1619 Don't think you should use Base64 encoding since you can decode the image. With hashing, you can preserve the integrity of the data, and nobody will know what sort of data is behind the hash.

I have never used IPFS, but seems like it could be a nice solution. Just simply create a field within /submitFairTradeData for documentHash and then just get the hash of the document, and update that field :)

[horeaporutiu]

@pratiksharma1619 This is a good post about the difference between base64 encoding and hashing: https://stackoverflow.com/questions/25058207/what-is-the-main-difference-between-base64-encode-hashing-and-sha1-md5