Smart contracts frequently require real-world data to conduct transactions, which necessitates interfacing with off-chain services that are not part of a blockchain. Smart contracts may now receive messages from the off-chain web but cannot send messages to internet servers.
Smart contracts, for instance, are unable to send emails, SMSes, or any other kind of HTTP request to a website. This has been the biggest roadblock to Web3 development thus far. However, one of the Internet Computer's most recent innovations, the "HTTPS outcall" feature, tries to get rid of this obstacle.
ICP developed a customized type of smart contract called "canisters" to provide HTTPS outcalls. When used to interface with off-chain web 2.0 apps, canister smart contracts have all the advantages of standard smart contracts plus extra memory for program and user data storage.
Canister smart contracts on the Internet Computer blockchain provide HTTP outcalls to web URLs in order to communicate directly with Web 2.0 services or business IT infrastructures. An HTTPS outcall, for instance, can be used to retrieve a cryptocurrency's most recent price information from a controlled exchange like CEX.IO.
Oracles and bridges are not required because HTTPS outcalls are processed by consensus, which eliminates their need. If the Internet Computer is widely used, this might represent a significant technical consolidation.
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