Based on ETH public chain, Raiden's sidechain and IPFS distributed storage technologies, ProChain aims to build a big data-based precision advertising distribution system. Advertisers can create advertising tasks through smart contracts, and reward users and media who trigger the ads
with PRA tokens in real time.
PRA, the token on the ProChain platform, conforms to the Ethereum ERC-20 token standard and can be traded freely on the ETH public chain. Advertisers purchase PRA tokens from Digital Currency Exchange and release advertising tasks, and publishers that have downloaded ProChain SDK and users who complete those tasks will be rewarded with an appropriate number of tokens.