I have a smart contract which have a function to allow/disallow user to send ether to my contract. By default all ETH address are allow to send ether to smart contract.
But, if I want to disallow some ETH address not to send ether, I have to write data on to the blockchain.
The same I want to do it from my WEB APP using web3.js
Can anyone provide me with example for the same.
Thanks In Advanced .......