Skip to content

Hyperledger fabric as a ledger support for aries.

Notifications You must be signed in to change notification settings

trential/fabric-aries

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

9 Commits
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

Fabric Aries

This is a design docs for integrating aries with hyperledger fabric blockchain. Doc will be almost common for other general purpose blockchain (like ethereum, solana, hedera hashgraph) which supports smart contracts.

Flow

Chaincode request flow

Aries Agent Authentication

authentication for aries agent making request to ledger.

  • Aries agent sends SignedLedgerRequest to Ledger (chaincode)
export interface SignedLedgerRequest {
    reqId: number;
    identifier: string; // did of transaction caller
    operation:  {[key: string] : any};
    protocolVersion: number;
    signature: string; // signature of caller with it's private key corresponding to verkey of did caller.
}
  • Chaincode authenticates caller by verifying signature, flow of signature verification should be:
    • get did from worldstate : getDID(request.identifier)
    • convert verkey to public key pub = ed25519.PublicKey(base58.Decode(did.verkey))
    • decode signature from base58 sign = base58.Decode(request.signature)
    • serialize message serialized_message = serialize(request)
    • verify signature valid = ed25519.Verify(pub, serialized_message, sign)

Chaincode initialization

Chaincode should be initialize with list of TRUSTEE :

[
   {
    "alias" : "",
    "dest" : "",
    "verkey" : "",
   } 
]

Registered TRUSTEE make nymTransaction

  • Fabric Client Authentication
  • Aries Agent Authentication
  • Create new NYM if not existing

Create Schema

  • Fabric Client Authentication
  • Aries Agent Authentication, role >= ENDORSER
  • Create new NYM if not existing
  • ID = ${identifier}:2:${schema.name}:${schema.version}

Create Credential Definition

  • Fabric Client Authentication
  • Aries Agent Authentication, role >= ENDORSER
  • Create new NYM if not existing
  • ID = ${identifier}:3:${credDef.signature_type}:${hash64(schemaID)}:${credDef.tag}

Chaincode response

Success

{
    "op" : "READ" || "WRITE",
    "type" : "1" || "101" || "102", // transaction type
    "identifier" : "7jUk7gMNzBXgZvVGPdDVnx", // did of caller
    "data" : {
        // op and type specific data
    }
}

Error

{
    "op" : "READ" || "WRITE",
    "type" : "1" || "101" || "102", // transaction type
    "identifier" : "7jUk7gMNzBXgZvVGPdDVnx", // did of caller
    "reason" : "error message"  
}

About

Hyperledger fabric as a ledger support for aries.

Resources

Stars

Watchers

Forks

Releases

No releases published

Packages

No packages published