Update #46 - Week 4 - October 2019


Spacemesh CEO Tomer Afek speaking at meetup in Beijing


  • We are finalizing the first release of the Spacemesh open testnet. We call it Spacemesh 0.1. Anyone with a PC, an Internet connection and some free disk space should be able to join. We are working hard to release Spacemesh 0.1 this December.
  • finished revamping most guide content to reflect sm 0.1 functionality
  • added guide page about s0.1 to clarify the final feature set
  • Merged issues


Update #45 - Week 3 - October 2019


  • Meetup in Beijing, China on October 15 - join us
Spacemesh CEO Tomer Afek at Dragonfly Crypto Summit Panel in Beijing, China
Lane Rettig at meetup in Osaka, Japan



  • We are writing documentation and adding comments to code in preparation for open testnet.
  • Merged issues

Update #44 - Week 2 - October 2019


Lane engaging the Tokyo Crypto Dev community
  • we’re organizing a meetup here in Osaka this weekend - join us
  • Crypt-O-Mesh Technology Room Session with Tal Moran watch
  • "A New Human Chain" blog by Lane Rettig about why he joined Spacemesh


Spacemesh Virtual Machine (SVM):

Go-Spacemesh client:

  • Added signatures to activation transactions and NIPoST persistency as part of our node reboot tolerance.
  • We are running tests and defining the protocol parameters and specs that we will run the test net with.
  • Merged issues

Update #43 - Week 1 - October 2019


Spacemesh goes to China

SVM (Spacemesh Virtual Machine)


  • Various bug fixes. See
  • Defined end-user labeling of TXs here

Go-Spacemesh Client

  • Shifting our focus to start large scale cloud testing for testnet readiness.
  • We are also starting a process of documenting our code and updating our wikis as preparation for test net launch.
  • Merged issues

Update #42 - Week 4 - September 2019


Crypt-O-Mesh Recap


  • Getting app functional on Windows and Linux (Ubuntu) in addition to MacOs
  • app testing on five-node local network, initial sandbox integration
  • Merged fixes

Go-Spacemesh Client

Spacemesh Virtual Machine (SVM)

  • Stabilization efforts continue.

Update #41 - Week 3 - September 2019


  • Friday the 13th Crypt-O-Mesh event was highly successful, with over 250 people attending including the most disruptive minds of our time. Thanks for a great night everyone.
  • In NYC, we had another Core Devs meetup last week, where Emin Gün Sirer spoke about AVA Labs and Ryan John King spoke about FOAM Protocol It’s quickly developing into a respected, small-but-focused and high quality group of people coming together monthly to do a tech deep dive.
Emin Gün Sirer


  • Fixes and improvements after 2 rounds of reviews and QA, moving forward to full integration with node. Fixed bugs

Go-Spacemesh Client

  • Implemented a safe node shutdown
  • Added fetch queue to avoid double requests on same data when syncing
  • Added some fixes and memory optimizations to the Hare Protocol
  • Merged issues

Spacemesh Virtual Machine (SVM)

  • We are continuing to stabilize the codebase before moving towards the next milestone, which is a standalone smart contracts vm based on wasmer with fixed storage / no gas metering.


Update #40 - Week 2 - September 2019

We apologize for the break in weekly updates and are recommitting to ensuring that they are published regularly moving forward.


Lane Rettig at NYC Core Developer Meetup
Lane Rettig at NYC Core Developer Meetup


  • The App team is completing the first round of QA and design review for the new visual look. We are preparing to publish version 0.0.1.

Go-Spacemesh Client

  • Added an event infrastructure and event collector sidecar for future statistics and blockmesh analysis. Wallets could also derive account-specific data from collector DB.
  • Alongside many bug fixes, we’ve introduced fetch queues to optimize data fetching from peers, added abstain votes for blocks and limited the number of atxs included in each block.
  • We’ve upgraded our testing infrastructure to use Jenkins pipelines to give us better automated testing and task monitoring. Merged issues.

Spacemesh Virtual Machine (SVM)

  • We are stabilizing the codebase before moving towards the next milestone, which is a standalone smart contracts vm based on wasmer with fixed storage / no gas metering.

Update #39 - Week 1 - August 2019


  • Published new blog post by Spacemesh co-founder Tomer Afek. Spacemesh Manifesto
  • We are organizing a new kind of monthly developer-focused meetup in NYC. First meetup is on 8/12. In NYC? Join us!

Open Source


  • The App team is focused on implementing the new visual look for the App for the open testnet milestone

go-spacemesh Client

  • The go-spacemesh team has been working hard on fixing bugs and preparing the client for our upcoming open testnet. Merged issues

Spacemesh Virtual Machine (SVM)

  • Good progress on the Spacemesh virtual machine project - the runtime for execution of smart contracts in the Spacemesh platform

Update #38 - Week 4 - July 2019

  • Go-spacemesh: focus is on stabilizing a 300 nodes closed testnet and fixing bugs.
  • App: implementing new visual designs. Here's a sneak peek at what's coming:



Update #37 - Week 3 - July 2019

Update #36 - Week 2 - July 2019

Localnet is coming!

  • Getting the Spacemesh local testnet ready for devs to hack on! We are improving the scripts a bit and hope to be able to support Win 10 Pro. Currently OS X and Linux are supported.
  • Usability testing and finalization of the Spacemesh App UX for the open testnet release.

Sneak peek - Spacemesh App new look is coming!

Update #35 - Week 1 - July 2019

Full Node

This week we’ve introduced sending poet proofs by gossip and added Block and ATX syntactic validation checks on data received from gossip network. We are moving forward towards a local test net able to run few instances on a local environment. We are also moving ahead with our scaling efforts, testing out different number of participating nodes, fixing bugs as we go on.


Update #34 - Week 4 - June 2019

This week the core dev team was focused on getting the platform ready for the local testnet milestone. The goal is to have a working dockerized local testnet running on a dev box. For details see https://testnet.spacemesh.io/#/local . The app dev team has been working on integrating the full node process into the app on node transactions integration.

Update #33 - Week 3 - June 2019

  • Full node: Added ed21599 signatures to transactions and made the p2p addressbook persistent to store, and configurable from store. we've added numerous improvements to our automations tests and to the framework itself, as a preparation for more rigorous tests.
  • App: focus is on node integration for getting transactions and statuses and on error handling across the app.
  • Community: Made available Wasm 2019 Berlin Workshop videos.

Update #32 - Week 2 - June 2019


Full Node

  • Eligibility oracle but fixes and work on stabilizing and refining mining and p2p tests


Update #31 - Week 1 - June 2019


Full Node / Client

  • Merged the new VRF eligibility oracle that relies on previously merged bls signature schemes
  • Merged the activation transaction sync flow
  • Added a network on-the-wire and in-memory deduplication to reduce bandwidth
  • Track our progress by browsing go-spacmesh merged PRs


Yaron Wittenstein from team Spacemesh talks about WASM smart contracts

  • We co-hosted and participated in WASM on the Blockchain 2019 Berlin workshop. The weekend workshop at Full Node Berlin was jam-packed with excellent sessions and discussions. Videos and decks will be published soon. WASM smart contracts are coming to your favorite blockchain, but we have several big challenges to overcome first...

Update #30 - Week 4 - May 2019

Full Node

The team is working hard on stabilizing the full node for our upcoming testnet milestone. We are running mining flows and handling bugs related to data availability, p2p and various memory performance issues.




  • Whiteboard sessions podcast from NY blockchain week is now available on Youtube. Please watch to get an overview of the consensus protocol.
  • If you prefer reading than watching videos then please check out our new blog post - Spacemesh protocol motivation

Update #29 - Week 3 - May 2019

After finishing to implement most of the Spacemesh Protocol major flows, we are now focused on testing and benchmarking to verify our network is tuned up to work with many nodes at scale on the cloud using our automation framework.

We are doing tests and benchmarks for gossip, mining, sync and consensus protocols. Another on-going effort is integration of the BLS signature scheme into the platform.

On the App front, this week we integrated our Edwards25519 WASM library into the App and worked on the App's desktop notifications feature.

For more details check out our pulse.

Update #28 - Week 2 - May 2019



  • We recorded a whiteboard session videocast with Tal Moran in NYC - episode coming online soon!


  • Thanks for coming to listen to Tal Moran and Iddo Bentov from team Spacemesh at our NYC blockchain week meetup.


Update #27 - Week 1 - May 2019

App & Full Node

Update #26 - Week 4 - April 2019


  • Finalized blockchain projects participation for our tech-focused meetup in NYC blockchain week. there's still some open spots. RSVP soon :-)
  • Finalized participation from awesome wasm people for WASM on the blockchain workshop we are helping to put together in Berlin in June. If you care about WASM on the blockchain then you should apply to participate! https://avive.github.io/wasm_on_the_blockchain/#/



Spacemesh Full Node

Spacemesh App

ED25519 Public Key Extraction Go Library


  • An open-source drop-in replacement to golang/crypto/ed25519 with additional functionality.

  • We have developed this for the Spacemesh protocol since we could not find a good open source alternative. We hope that the open source blockchain dev community will find these capabilities useful in other scenarios and platforms.

  • In the ed25519 signature scheme, in order to verify the validity of a given signature, the validator should posses the public key of the signer. It can be sent along with the message and its signature, which means that the overall data being sent includes 256 bits of the public key. Our function allows to extract the public key from the signature (and the message), thus the public key may not be sent, resulting in a smaller transferred data.

Update #25 - Week 3 - April 2019



Update #24 - Week 2 - April 2019

Spacemesh App (Wallet + Full Node)

Spacemesh Core (Full Node + POET Service)

Update #23 - Week 1 - April 2019

Spacemesh Core (Full Node + POET Service)

Spacemesh App (Wallet + Full Node)

Lots of merged PRs for the core App screens


We just announced our this free community 2 days workshop for blockchain and layer-2 projects that are working on wasm tech for their programmability features. Join us in Berlin this June for this special event. Participants include builders from ewasm, parity, mozilla, wasm and wasmer.io. People from Spacemesh have been working on putting together this event with great people from ewasm, 1kx and Parity.

Update #22 - Week 4 - March 2019

Spacemesh p2p full node

Spacemesh POET Service

Spacemesh App (Wallet + Full Node GUI)

Update #21 - Week 3 - March 2019

Update #20 - Week 2 - March 2019


Spacemesh’s Co-Founder Tomer Afek leading a panel in Token 2049 discussing the challenges and potential opportunities of Web 3.0

Core Dev Team

Update #19 - Week 1 - March 2019

Update #18 - Week 4 - Feb 2019

Update #17 - Week 3 - Feb 2019

Update #16 - Week 2 - Feb 2019

  • Merged first implementation of a running full node with Hare consensus protocol and unoptimized tortoise
  • Merged a new system-wide logging service that supports sending and events and metrics to a global test network orchestrator
  • Merged a fixed size pseudo-random Oracle for role and block validation as preparation for system testing
  • Implemented rudimentary CLI wallet
  • Added definitions and flow charts for the Hare protocol
  • Merged basic POET server infrastructure
  • Announced our next upcoming live dev community sync on Youtube. Set a reminder and ask us anything
  • Merged the first test of a complete network running hare and tortoise consensus protocols, agreeing on the state of the networks shared ledger
  • Merged optimal Tortoise protocol implementation
  • Added node events for improved test networks debugging
  • Added genesis state configuration

Update #15 - Week 1 - Feb 2019

Update #14 - Week 4 - Jan 2019

  • Easier go-spacemesh dev environment setup. This will help the core dev team and open source contributors to work more efficiently
  • Extended and improved the Hare protocol test suite
  • Switched to NaCL authentication and encryption in P2P layer. PR merged
  • Fixed some tests that failed on local machines. #469 and #466
  • Added POET prover-verifier integration tests for benchmarking the protocol
  • Announcing our #2 core dev community sync - live on Youtube on Feb 3rd https://youtu.be/85eazslNWqU - The core dev team will answer any technical question about Spacemesh asked in our Gitter dev talk as well as live questions on the Youtube stream via the chat feature
  • We made public our Proofs of Elapsed Time service reference repo
  • New post on / - Proofs of Space Time and Decentralization - video recording and slides of Iddo Bentov’s presentation in Amsterdam Bitcoin Wednesday /iddo-bitcoin-wednesday/
  • Finished our first UX design iteration for the Spacemesh Full Node and Wallet App for desktop computers, and published our learnings from 2 usability testing sessions

Update #13 - Week 3 - Jan 2019

We are getting closer to run our first nodes test network, currently without mining capabilities.

Created a rudimentary wallet grpc and HTTP API for use in the test network

Created a test Rolacle (Roles oracle) for testing our hare protocol

Update #12 - Week 2 - Jan 2019



  • Finalized an iteration of the Spacemesh Wallet App desktop UX for another round of usability tests

Update #11 - Week 1 - Jan 2019

Update #10 - Week 4 - December 2018

Update #9 - Week 3 - December 2018

Update #8 - Weeek 1 & 2 - December 2018

Spacemesh Full Node


Spacemesh App (Wallet + Dashboard)

  • Published revision 0.2 of the Spacemesh App design for desktop class screens

  • Published tests implementing the core Spacemesh Wallet security design - Basic BLS key derivation from random seed, 12 words mnemonic for paper backups and wallet file user pin protection via KDF2 and AES

  • Integrated a high-performance WASM BLS signatures library and put together some tests to demonstrating usage pattern

  • Published draft of the Spacemesh API for connecting the Wallet with the Spacemesh blockmesh

POET Service

Update #7 - Week 3 - November 2018

  • Initial version POET GO prover and verifier merged

  • First version of the Tortoise protocol merged

  • A first commit of the new Hare protocol message structure

  • First version of the gossip protocol merged

  • Preliminary design of Spacemesh global state and transaction processor

  • Sync protocol implementation PR

Update #6 - Week 1 and 2 - November 2018


Update #5 - Week 4 - October 2018

  • Fewer PR merges and more devcon4 learnings and community engagement for the core dev team this week.

  • Devnet: Implemented the bootstrap scenario. Improved infra and refactoring some of its interfaces. Merged #46 .

  • Poet (VDF) black-box reference go prover: Added support for pluggable hash functions and for scrypt-based hashing. Pref optimization based on profiling and benchmarking. Open source go prover: #9 code review in progress. Come build VDFs with us.

Update #4 - Week 3 - October 2018



  • Merged PR: listening port is now sent in handshake
  • Gossip is in testing phase in branch p2p-gossip
  • Published gossip protocol design doc
  • Testing RPC api functionality in the TLV hackathon branch
  • Work in progress on the core proofs of elapsed time (POET) server go implementation by open source contributors
  • Code completed and heavily testing new black-box POET prover and verifier GO implementation based on the shared spec
  • Work started on the POET protocol spec implementation. Spec draft updated with more details
  • Work started on many Spacemesh App feature tasks by open source contributors. Join us here
  • Gitcoin funded several dev tasks to tip open source contributors with cryptocurrency
  • Extensive work on the DEVNET, that could test system scenarios on our decentralized network is gaining momentum. This week we managed to create some basic scenarios that included interaction between several P2P nodes. PR #42 merged plus 8 additional merged PRs


Update #3 - Week 1 and 2 - October 2018



  • Core dev team go-spacemesh project updates:

    • On-going dev work at full steam ahead on p2p and the consensus protocol
    • Set requirements for the Transaction processor and Account DB - two components that are representing the node's internal view of the mesh
    • Set requirements for the mesh sync protocol that will allow a node to get the current mesh state for which a consensus can be proved
    • Fixed a bug in the connection cache where in case two node's tried to simultaneously connect to each other they ended up with both connections getting closed
    • Fixed a bug in the secured session where due to the nature of the crypto package that we are using, the decryption of messages that got encrypted and sent on the wire in different order failed.
    • Made the listening port configurable and allowing nodes to discover other node's listening port using dht's discovery protocol
    • The Spacemesh devnet cloud testing environment is getting into shape currently it supports spawning full nodes with agents that poll commands from the automation server that sets off node's api calls. Soon it will support testing bootstrap scenarios
  • Join our upcoming Tel Aviv Hackathon - Hack the future of nations The first hackathon for reinventing the way countries work using P2P decentralized technologies

  • We are hiring full time blockchain developers in New York and in Tel Aviv! New positions here

  • Proofs of Elapsed Time (POET) MVP spec published and reviewed by our research team and dev work started by open source collaborators. We are actively looking for additional open source contributors for this project

  • Product work completed for the first version of the Spacemesh Wallet including detailed use cases and UX. Dev work started by open source developers. Join gitter our dev talk here. Good progress with contributors breaking down spec to good github dev tasks.

  • We are proud to be able to tip open source contributors with cryptocurrency via Gitcoin and to appear at a nice spot among great other blockchain projects on this leaderboard. Watch this space for additional bounties

  • Launched new public product repo for all Spacemesh high-level product work and published a draft of the high-level product plan

Update #2 - Week 1 - September 2018


  • Dev and research teams update: work in progress on tasks mentioned in last week's update
  • Published protocol stack - a series of personal blog posts from developers about interesting technical challenges involved in their work on the Spacemesh protocol. You can see these on our community page by filtering on the "protocol stack" tag.
  • Published a new welcome to Spacemesh video to explain some of the project’s core ideas and concepts /
  • Hosted a “blockchain reality check” panel in SpacemeshTLV rooftop with great panelists including @hosseeb, @heatherharde ,@cryptomanran, @tomerafek and @yaronsamid MCing
  • Announced new funding and partnerships with Metastable, Polychain, Coinbase, 1kx, Dekrypt, Slow Ventures and others. See: /funding/
  • Talked about fair protocols beyond POW and PoStake at https://www.dezentral.io/ in Berlin and @avive from the team participated in the Beyond Ethereum panel

Update #1 - Week 4 - August 2018

  • Our dev and research teams are working on the Gossip p2p protocol and the Tortoise & Hare consensus algorithms. This is a multi-week ongoing effort as these tasks are at the heart of the Spacemesh protocol
  • 2 new full-time developers have joined our growing core dev team. We are actively hiring strong crypto developers who make quality contributions to one of our open source projects
  • We published a draft requirements and design for the Spacemesh public proof of elapsed time (POET) service. We fully work in the open on this (and all other projects) so you are welcome to join and participate in the api design phase
  • Some good product and UX work on the Spacemesh Wallet and Dashboard App. We have finalized the requirements and the initial user experience and posted everything to the repo
  • We reached the alpha milestone for Spacemesh Cosmic - our open source seed project for building hyper-universal apps (desktop/mobile native/web). You can use Cosmic to build your own universal apps. We are using Cosmic ourselves as the base app scaffolding for the Spacemesh App. We also tipped major contributors for their voluntary work on this project using gitcoin bounties
  • Next week... we are speaking about race-free and asic-resistant consensus in dezentral.ion . Come see us if you are coming to Blockchain week Berlin!