Delegate to a DRep

DRep delegation with Anvil API

DRep (Delegation Representative) delegation enables users to participate in Cardano's governance system by assigning their voting power to chosen representatives. By integrating DRep delegation into your application, you empower users to influence the blockchain's future without requiring them to actively participate in every governance decision.

API Endpoint

URL: https://preprod.api.ada-anvil.app/v2/services/transactions/build Method: POST Headers: Content-Type: application/json, x-api-key: YOUR_API_KEY

Request Format

{
  "changeAddress": "addr_test1...",
  "utxos": ["8282...", "8282..."],
  "delegations": [
    {
      "type": "drep",
      "address": "addr_test1...",
      "keyHash": "drep13d6sxkyz6st9h65qqrzd8ukpywhr8swe9f6357qntgjqye0gttd"
    }
  ]
}

Parameter Details

Parameter	Description	Example
type	Must be "drep"	"drep"
address	User's full address	"addr_test1..."
keyHash	DRep ID to delegate to	"drep13d6s..."
utxos	Array of UTXOs in CBOR hex format	["8282...", "8282..."]

Implementation Examples

Using Fetch API:

Deno & Fetch

Using cURL:

Bash & cURL

Transaction Signing

After building the transaction, it must be signed before submission:

https://github.com/Cardano-Forge/anvil-api/blob/main/docs/guides/transaction/signing-transaction.md

User Interface Examples

Eternl's DRep delegation interface provides a good reference