The Identity Factory is a suite of smart contracts that together make a complete blockchain based identity solution. Through the factory individuals can create identities for themselves, while event organizers/institutions etc. can create Souls, that are able to issue soulbound tokens (SBT) to the identity contracts.

The Identity.sol contract is an ERC725 contract that is able to hold SBTs, and can contain any information about the identity. We are using the setData function of ERC725 to store some arbitrary bytes that represent the profile information of the identity. This can be an IPFS hash that refers to a JSON file for example. This profile data is stored under the key PROFILE_IDENTIFIER which is set to keccak256("Profile").

The Soul.sol contract is an Identity that owns an SBT an has minting capability. Upon the initialization of the contract an SBT contract is deployed and the Soul is set as it's owner.

Implementation of a soulbound token. Soulbound tokens are non-transferrable, non-financializable tokens proposed by Vitalik Buterin. Our implementation shares most of its functionality with the ERC721 standard, except that the transfer functions are taken out, thereby making the SBTs non-transferrable.

Contract for deploying identities and souls. It relies on the Clones library from OpenZeppelin to create many instances of the same contract. An important limitation is that only one identity and soul can be created per wallet.