---
title: "Stellar Deploys Bell Upgrade to Testnet Ahead of Mainnet Vote"
description: "The testnet release requires wallet and indexer updates while introducing optional post-quantum signature verification for smart contracts."
url: https://basisdesk.news/news/stellar-bell-upgrade-testnet-launch
published: 2026-11-03T19:46:46.455Z
modified: 2026-11-03T19:46:46.455Z
section: Tech & Protocols
author: Basis Desk Newsroom (AI-generated, source-verified)
sentiment: neutral
tickers: [XLM]
tags: [stellar, testnet, smart-contracts, upgrades, cryptography]
license: Quote with attribution to Basis Desk (basisdesk.news). Not financial advice.
---

# Stellar Deploys Bell Upgrade to Testnet Ahead of Mainnet Vote

The testnet release requires wallet and indexer updates while introducing optional post-quantum signature verification for smart contracts.

## At a glance

- **What happened:** Stellar deployed the Bell upgrade to its testnet ahead of a mainnet validator vote.
- **Why it matters:** Smart contracts gain optional post-quantum signature verification, while node tools, wallets, and indexers must update.
- **Who is affected:** Stellar wallet providers, indexer operators, and smart contract developers.
- **What's next:** A validator vote on whether to activate the Bell upgrade on the mainnet.
- **Status:** announced
- **Primary source:** [Stellar's Bell Upgrade Goes Live on Testnet Ahead of Mainnet Vote](https://thedefiant.io/news/blockchains/stellar-s-bell-upgrade-goes-live-on-testnet-ahead-of-mainnet-vote) — thedefiant.io

## Key points

- Stellar launched the Bell protocol upgrade on its testnet ahead of an upcoming mainnet vote.
- Smart contracts on the network gain optional post-quantum signature verification capabilities.
- Wallet providers and indexer operators must upgrade their software to maintain compatibility.

## Editorial remark

- **Context:** Stellar is preparing its protocol infrastructure for advanced cryptographic standards through a scheduled network upgrade cycle [1].
- **Impact:** Wallet operators, indexers, and smart contract developers must update dependencies to remain compatible with Bell protocol rules [1].
- **Watch:** Network participants await the mainnet governance vote to determine if and when the upgrade transitions to production [1].

Stellar has launched its Bell protocol upgrade on the network's testnet ahead of an upcoming governance vote by mainnet validators [1].

The upgrade introduces optional post-quantum signature verification support for smart contracts deployed on the network [1]. To prepare for the network transition, ecosystem wallet providers and data indexers must update their client software to ensure compatibility with the updated protocol environment [1].

## Post-Quantum Preparations

Integrating quantum-resistant cryptographic primitives allows smart contract developers to implement defenses against emerging computing architectures [1]. The testnet environment serves as the trial phase before node operators and validators participate in a formal vote on whether to activate the Bell upgrade on the primary Stellar ledger [1].

At the time of writing, native token $XLM traded at $0.1632.

## Sources

1. [Stellar's Bell Upgrade Goes Live on Testnet Ahead of Mainnet Vote](https://thedefiant.io/news/blockchains/stellar-s-bell-upgrade-goes-live-on-testnet-ahead-of-mainnet-vote) — thedefiant.io, 2026-11-03

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Basis Desk Newsroom · AI-generated, source-verified · https://basisdesk.news/about/how-we-use-ai