Voting

DReps, Constitutional Committee members, and Stake Pool Operators can vote on governance actions. Evolution SDK's vote operation submits voting procedures in a transaction.

Casting a Vote

Build a VotingProcedures object with a voter, the governance action to vote on, and your vote (yes/no/abstain):

import { , , , , ,  } from "@evolution-sdk/evolution"

const  = .()
  .({
    : "https://cardano-preprod.blockfrost.io/api/v0",
    : ..!
  })
  .({ : ..!, : 0 })

// 1. Create a voter (DRep identified by key hash, script hash, or built-in)
declare const : . // from DRep.fromKeyHash() or DRep.fromScriptHash()
const  = new .({  })

// 2. Identify the governance action to vote on (from chain query or governance explorer)
declare const : .
const  = new .({
  : ,
  : 0n,
})

// 3. Create a voting procedure — yes(), no(), or abstain()
const  = new .({
  : .(),
  : null, // optional metadata URL + hash
})

// 4. Combine into VotingProcedures and submit
const  = .(, , )

const  = await .().({  }).()
const  = await .()
await .()

Vote Options

Function	Meaning
`VotingProcedures.yes()`	Vote in favor
`VotingProcedures.no()`	Vote against
`VotingProcedures.abstain()`	Explicitly abstain

Voter Types

Voter	Credential Type	Script-Controlled?
DRep	Key hash or script hash	Yes
Constitutional Committee	Hot credential (key or script)	Yes
Stake Pool Operator	Pool key hash	No (key-hash only)

Script-Controlled Voting

For DReps or Committee members with script credentials, provide a redeemer:

import { , , ,  } from "@evolution-sdk/evolution"

const  = .()
  .({
    : "https://cardano-preprod.blockfrost.io/api/v0",
    : ..!
  })
  .({ : ..!, : 0 })

declare const : . // built with singleVote() as shown above
declare const : any // compiled Plutus voting script (from Aiken build or Blueprint codegen)

const  = await 
  .()
  .({
    ,
    : .(0n, []), // Vote purpose validator
    : "drep-vote"
  })
  .({ :  })
  .()

const  = await .()
await .()

The builder automatically detects script-controlled voters and will fail if a redeemer is required but not provided.

Next Steps

DRep Registration — Register before voting
Proposals — Submit governance actions to vote on
Vote Delegation — Delegate voting power

Voting

Voting

Casting a Vote

Vote Options

Voter Types

Script-Controlled Voting

Next Steps

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