Hello Sir,
Good Day!
I am a full stack developer with 10 years experience , I am also having experience with Bitcoin, Litecoin, and BlockChain.
Kindly confirm do you have registered/approved accounts with Blockchain.
Do you provide BlockChain API?
Also please share more details of the project so I can prepare a detailed proposal and also share my development plan with you.
About the cost this is not the actual price, I need to check all the details then I would be able to give you an exact quote.
Regards,
SH