STACK

The Platform architecture is:

Standards and protocols

Our platform and applications support Ethereum and ERC-721 token standards.

• Ethereum is a decentralized platform that runs smart contracts: applications that run exactly as programmed without any possibility of downtime, censorship, fraud or third-party interference. These apps run on a custom-built blockchain, an enormously powerful shared global infrastructure that can move value around and represent the ownership of property.

• ERC-721 is a free, open standard that describes how to build nonfungible or unique tokens on the Ethereum blockchain. While most tokens are fungible (every token is the same as every other token), ERC721 tokens are all unique. Think of them like rare, one-of-a-kind collectables.

Smart contracts

• Smart contracts are self-executing contracts with the terms of the contract between buyer and seller directly written into lines of code. They run on the blockchain, so they are stored on a public database and cannot be changed. The transactions that happen in a smart contract are processed by the blockchain, which means they can be sent automatically without a third party

• We use smart contracts for the minting and listing NFTs, also sending questions to other accounts.

Decentralized storage IPFS

IPFS is a file-sharing system that can be leveraged to more efficiently store and share large files. It relies on cryptographic hashes that can easily be stored on a blockchain. Nonetheless, IPFS does not permit users to share files with selected parties.

For connection with metadata, we are using IPFS URI.

• A Uniform Resource Identifier, or URI, is used to specify a particular piece of content in a given context. The context is determined by the URI scheme (appended to the URI as a prefix, followed by ://). The URI scheme for IPFS is simply ipfs.

• IPFS URIs are the canonical representation for an IPFS link since the ipfs scheme makes it clear and unambiguous that the CID (uniquely identify a piece of content) refers to content on IPFS and not some other system.

• We are using an IPFS URI to link from smart contracts to any external data stored using IPFS, including any metadata that describes and contextualizes the token.

• IPFS URIs are also the way to link from within a token's metadata to images and other assets stored on IPFS.

Wallet

We support the web wallets and main mobile Ethereum and Ethereum like platforms. Wallet used for transactions on Eroteme is Metamask. The wallet is the main asset storage tool and also a communicational gateway to the blockchain API.