Protocol Upgrades

An ever-evolving network

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Stellar Development Foundation

Protocol 22 Upgrade Guide

Protocol upgrade

Soroban

Your go-to guide for upgrading to Protocol 22, which introduces constructors and host functions for BLS12-381 to the Stellar network.

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Article

Nicole Adair

Protocol 21 Upgrade Guide

Your go-to guide for upgrading to Protocol 21, which introduces secp256r1, improvements to state archival, and fee optimizations to the Stellar…

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Article

Stellar Development Foundation

Protocol 20 Upgrade Guide

Protocol upgrade

Soroban

Your go-to guide for upgrading to Protocol 20, which introduces support for Soroban smart contracts to Stellar.

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Article

Justin Rice

Protocol 19 Upgrade Complete!

Today, June 8, 2022 at 15:00 UTC, the Stellar public network successfully upgraded to Protocol 19! If you're having trouble with your Stellar…

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Article

Justin Rice

Protocol 19 Upgrade Guide

A dev guide to upgrading to Protocol 19.

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Article

Justin Rice

Protocol 18 Upgrade Complete!

Protocol upgrade

AMM

Liquidity

Today, November 3, 2021 at 15:00 UTC, the Stellar public network successfully upgraded to Protocol 18. It's a big day and a big upgrade because it…

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Article

Justin Rice

Protocol 18 Upgrade Guide

Protocol upgrade

AMM

Liquidity

Protocol 18, which enables the creation of AMMs on Stellar, is coming! If you develop on Stellar, you need to install up-to-date versions of all…

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Article

Justin Rice

Protocol 17 Upgrade Complete!

Protocol upgrade

Asset clawback

Regulation

Today, June 1, 2021 at 1500 UTC, the Stellar public network successfully upgraded to Protocol 17, which introduces a new feature designed to make it…

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Article

Justin Rice

Protocol 17 Upgrade Guide

Protocol upgrade

Asset clawback

Regulation

If you develop on Stellar, you need to prepare for the June 1, 2021 Protocol 17 network upgrade by installing up-to-date versions of all…

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Article

Justin Rice

Protocol 16 Upgrade Complete!

Protocol upgrade

Network halt

Today, April 10, 20201 at 1500 UTC, Stellar public network validators voted to upgrade the network to Protocol 16. This special network upgrade was…

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Article

Stellar Development Foundation

Protocol 16 Upgrade Guide

Protocol upgrade

Network halt

We just released a new version of Stellar Core that will resolve the issues many nodes experienced this week. If you run a Stellar node of any kind,…

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Article

Justin Rice

Protocol 15 Upgrade Complete!

Protocol upgrade

Sponsored reserves

Claimable balances

On 11/23/2020 at 1600 UTC, Stellar validators voted to upgrade the public network to Protocol 15. Two new features — Claimable Balances and Sponsored…

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Article

Justin Rice

Announcing...Stellar Protocol 15

Protocol upgrade

Claimable balances

Sponsored reserves

It turns out we're skipping the public network upgrade to Protocol 14. Instead, we're going straight to Protocol 15, and rescheduling the vote to…

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Developer Blogs

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Bri Wylde

Announcing the Deep Dive Docs Bounty

Starting May 29th through August 7th, 2024 get awarded for contributing to the Stellar Developer Docs as part of the Deep Dive Docs Bounty (it’s…

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Garand Tyson

Upcoming Database Changes in Protocol 21

In Protocol 21, Soroban is getting its first big upgrade with the implementation of five new CAPs that introduce some exciting features, such as…

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Nicole Adair

Protocol 21 Upgrade Guide

Your go-to guide for upgrading to Protocol 21, which introduces secp256r1, improvements to state archival, and fee optimizations to the Stellar…

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Bri Wylde

Announcing Protocol 21

Soroban, the smart contract platform on Stellar, launched on Mainnet following a successful validator vote on February 20, 2024. And after almost…

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Stellar Development Foundation

The Soroban Audit Bank: Fostering a Secure Smart Contract Ecosystem

The Stellar Development Foundation Security Audit Bank will distribute up to $1M in security audit credits in coordination with six top-tier audit…

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Nicole Adair

Smart Contracts Made Simple: Dogfooding Soroban at the SDF

Last month, the Stellar Development Foundation (SDF) ran a dogfooding experiment with a core question: can we get every single employee, no matter…

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