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Identifier

Each identity has a unique identifier. ID is:

  • Permanent: it remains the same for the entire existence of an identity.
  • Unique: No two identities can have the same ID.

The ID is deterministically calculated from the Genesis State.

Retrieve the Identifier ID

package main

import (
"fmt"

core "github.com/iden3/go-iden3-core"
)

// Retrieve ID
func main() {

    id, _ := core.IdGenesisFromIdenState(core.TypeDefault, state.BigInt())

    fmt.Println("ID:", id)

}

Here is what the output would look like: 

ID:
11AbuG9EKnWVXK1tooT2NyStQod2EnLhfccSajkwJA

Hereafter, this identity is represented as a mapping: ID => IdS. This gets published, together with all other identities, inside the identities mapping, which is part of the State.sol contract. While the ID remains constant, the Identity State will get updated as soon as the identity adds or revokes claims in its trees.

No Personal Identifiable Information (PPI) is stored on-chain. From the IdS is impossible to retrieve any information (represented as claim) stored inside the Identity Claims Tree

The Identity State hasn't been published on-chain yet. For this you have to go through the Identity State Transition, which is the subject of the next section.

The executable code can be found here