The problem InstAd (An advertising platform) solves

Targeted Advertising Allow users to choose specific websites based on their target audience, interests, and demographics. This way, they can ensure that their ad is seen by the right people, increasing the chances of engagement and conversion.

Contract addres that deployed on shardeum network (liberty 1.5) : 0xD60244ABD90e5FFf345c96ffCfB28181C286B3Bf

Challenges we ran into

-> To ensure that both parties are satisfied with the transaction, I have created a smart contract that specify the duration and price of the advertising, as well as the conditions for refunding the payment if the advertisement is not displayed.
-> To accept crypto payments, we integrated a cryptocurrency wallet into our dapp, which allows users to make payments in the form of cryptocurrencies such as SHM (shardeum).
-> In summary, implementing targeted advertising, smart contracts, and crypto payments requires careful planning and execution. By leveraging user profiling, smart contract technology, and cryptocurrency payment. we can created a transparent, secure, and efficient advertising platform that benefits both advertisers and publishers.