@zkred/agent-id

zkred-agent-id

A package for agent identification and management.

Installation

npm install @zkred/agent-id

Usage

import zkredAgentId from "@zkred/agent-id";

// Generate a new private key
const privateKey = zkredAgentId.generatePrivateKey();

// Create an agent identity
const identity = await zkredAgentId.createIdentity(
  privateKey,
  "My Agent Description",
  80002, // Polygon Amoy testnet
  "https://my-agent-service.com"
);

API Reference

Core Functions

generateDID(ethAddress, chain, network)

Generates a Decentralized Identifier (DID) from an Ethereum address.

• Parameters:
  • ethAddress: Ethereum address (0x-prefixed, 20 bytes)
  • chain: Chain name (e.g., "polygon", "privado")
  • network: Network name (e.g., "amoy", "main")
• Returns: DID string in the format did:iden3:chain:network:base58Id

getETHPublicKeyFromDID(didFull)

Extracts the Ethereum public key from a DID.

• Parameters:
  • didFull: Full DID string (e.g., "did:iden3:polygon:amoy:x6x5sor7zpyT5mmpg4fADaR47NADVbohtww4ppWZF")
• Returns: Ethereum public key (hex) or null if not Ethereum-controlled

createIdentity(privateKey, description, chainId, serviceEndpoint, rpcUrl)

Registers an agent to the central Registry using native token payment.

• Parameters:
  • privateKey: Private key of wallet to register
  • description: Description of the agent
  • chainId: Chain ID (80002 for Polygon Amoy, 296 for Hedera, 16602 for OG)
  • serviceEndpoint: Service endpoint URL
  • rpcUrl: (Optional) RPC URL for the chain
• Returns: Object containing transaction hash, DID, description, service endpoint, and agent ID

validateAgent(did, chainId, rpcUrl)

Validates an agent's registration.

• Parameters:
  • did: DID of the agent
  • chainId: Chain ID
  • rpcUrl: (Optional) RPC URL
• Returns: Agent details including DID, agent ID, description, and service endpoint

registerAgentByUSDC(privateKey, description, chainId, serviceEndpoint, rpcUrl)

Registers an agent using USDC payment via x402 payment interceptor.

• Parameters:
  • privateKey: Private key of wallet to register
  • description: Description of the agent
  • chainId: Chain ID
  • serviceEndpoint: Service endpoint URL
  • rpcUrl: (Optional) RPC URL
• Returns: Promise resolving to agent details

Handshake Functions

initiateHandshake(initiatorDid, initiatorChainId, receiverDid, receiverChainId, initiatorRpcUrl, receiverRpcUrl)

Initiates a handshake between two agents.

• Parameters:
  • initiatorDid: DID of the initiating agent
  • initiatorChainId: Chain ID of the initiator
  • receiverDid: DID of the receiving agent
  • receiverChainId: Chain ID of the receiver
  • initiatorRpcUrl: (Optional) RPC URL for initiator chain
  • receiverRpcUrl: (Optional) RPC URL for receiver chain
• Returns: Session details including session ID, callback endpoint, and challenge

copmleteHandshake(privateKey, sessionId, receiverAgentCallbackEndPoint, challenge)

Completes a handshake by signing the challenge.

• Parameters:
  • privateKey: Private key for signing
  • sessionId: Session ID from initiate handshake
  • receiverAgentCallbackEndPoint: Callback endpoint of receiver
  • challenge: Challenge to sign
• Returns: Boolean indicating success

verifySignature(sessionId, challenge, signature, did)

Verifies a signature from a handshake.

• Parameters:
  • sessionId: Session ID
  • challenge: Challenge that was signed
  • signature: Signature to verify
  • did: DID of the signer
• Returns: Boolean indicating if signature is valid

Utility Functions

generatePrivateKey()

Generates a new random Ethereum private key.

• Returns: Private key string

generateChallenge(length)

Generates a random challenge string for authentication.

• Parameters:
  • length: (Optional) Length of challenge, default is 10
• Returns: Random string

Supported Networks

• Polygon Amoy (Chain ID: 80002)
• Hedera (Chain ID: 296)
• OG (Chain ID: 16602)