bor_getCurrentProposer

bor_getCurrentProposer returns a single 0x-prefixed address: the signer of the validator that is the current block proposer on Polygon. This is part of the bor namespace — Polygon's Bor (Proof-of-Stake) consensus extension — and is not exposed by standard EVM/Geth methods.

The proposer rotates every block (Polygon block time is ~2.1s), selected by stake weight within the active validator set. Because the answer changes so frequently, this method is best suited to real-time "who is proposing right now" lookups — for example, MEV pre-confirmation logic or live validator dashboards. Poll it once per block at most; the value is stale almost immediately after it is read.

If you need the full proposer schedule for an epoch rather than the single current proposer, call bor_getSnapshot instead, which returns the validator set together with the recent-signers history. To resolve the proposer (author) of a historic block, use bor_getAuthor.

This is a bor-namespace method available on the Pro tier and above. It is rate limited per tier with a short burst allowance; there is no daily quota.

This method takes no parameters. Pass an empty array.

Response fields

See the shared error envelope reference for the full error object shape and handling guidance.

JavaScript (fetch)

const res = await fetch("https://api.triport.io/polygon", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${process.env.TRIPORT_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    jsonrpc: "2.0",
    id: 1,
    method: "bor_getCurrentProposer",
    params: [],
  }),
});


const { result } = await res.json();
console.log("current proposer:", result);

TypeScript SDK (@triport/sdk)

import { Triport } from "@triport/sdk";


const triport = new Triport({ apiKey: process.env.TRIPORT_API_KEY! });


const proposer = await triport.polygon.request("bor_getCurrentProposer", []);
console.log("current proposer:", proposer);

Python (triport-sdk)

import os
from triport import Triport


triport = Triport(api_key=os.environ["TRIPORT_API_KEY"])


proposer = triport.polygon.request("bor_getCurrentProposer", [])
print("current proposer:", proposer)

• The proposer changes every block (~2.1s). Treat the result as a point-in-time snapshot; do not cache it across blocks.
• For the full epoch proposer schedule (validator set + recent signers), use bor_getSnapshot. For the proposer of a specific historic block, use bor_getAuthor. For the active validator set with stake weights, see bor_getCurrentValidators.
• bor_* methods reflect Polygon Bor consensus state and have no Ethereum equivalent.