Nomadic Labs
Nomadic Labs
Announcing the report “Possible evolutions of the voting system in Tezos”

Announcing a report on possible evolutions of the voting system in Tezos

Nomadic labs has an ongoing research relationship with INRIA (a French national technology research agency).

In the context of this relationship, Nomadic Labs commissioned a short report to explore what a privacy-preserving amendment procedure might look like on Tezos, authored by three experts in voting protocols and cryptography: Véronique Cortier, Pierrick Gaudry and Stéphane Glondu.

There is no plan to implement the contents of the report for now, but we welcome and encourage feedback on its findings: from regular Tezos users, and from research and industry experts.

The report is here and we encourage you to leave comments in this agora post. Thank you.


Meanwhile at Nomadic Labs #11

A summary of Nomadic Labs activities in the first quarter of 2021

Welcome to our meanwhile series, the ongoing story of Nomadic Labs’ amazing adventures in the Tezos blockchain space. This post is a recap of our activities in the first quarter of 2021, following on from our 2020 recap. As always, you can find out more about us here: Twitter @LabosNomades ~ Website ~ LinkedIn ~ Technical blog ~ GitLab repo So here’s what we’ve been up to these past three months: Edo protocol upgrade and Florence...

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Sound and fast gas monitoring with saturation arithmetic

Fast calculation of gas costs using saturation arithmetic. With speed comes some theoretical loss of safety, but in practice it works well.

Sound and fast gas monitoring? Let’s use saturation arithmetic! Introduction: we got gas In Tezos, as with most smart contract platforms, on-chain operations cost gas — a theoretical resource intended to reflect (and so limit) the on-chain computational cost of running a smart contract. The gas model allocates gas costs to atomic computation steps. When a computation starts it receives some finite allocation of gas, from which the gas cost of each of its atomic computations is deducted...

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Tezos calling convention migrating from Breadth-First to Depth-First Order (BFS to DFS)

Summary: If the Florence proposal is adopted, we recommend you do not deploy new Michelson contracts that are dependent on the BFS calling convention. We do not expect this to be a problem in practice. However, those planning on deploying contracts in the near term should check that their contract’s correctness is unaffected by the change in calling convention. The current calling convention for intercontract calls in Tezos is that they are added to a “first-in,...

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Baking Accounts proposal contains unexpected breaking changes

Summary Ongoing testing and review of baking accounts has uncovered some important and previously undocumented breaking changes (see the section on breaking changes in the TZIP for Baking Accounts) in the baking account proposal. These issues are significant, and affect the functionality of both existing and future smart contracts; they are detailed below. Bakers should please these carefully when casting their vote. We believe Baking Accounts should be postponed until a thorough audit of functionality is...

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Florence: Our Next Protocol Upgrade Proposal

Announcing Florence Proposal

UPDATE: We believe that the baking accounts implementation is significantly flawed. See: Baking Accounts proposal contains unexpected breaking changes This is a joint announcement from Nomadic Labs, Marigold, DaiLambda, and Tarides. As we described in this post, several development organizations in the Tezos ecosystem are now collaborating to submit protocol upgrade proposals every few months, which is the interval permitted by the Tezos on-chain governance process. When the Edo upgrade went live on February 13,...

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A technical description of the Dexter flaw

In this technical blog post, we detail the flaw found in the Dexter contract and the exploit used to “white-knight” the funds in those contracts. Background The Dexter contract contains several entrypoints allowing users to perform various operations, such as adding and removing liquidity, or converting tokens to tez back and forth. The exact interface is given by the type of the contract’s parameter: parameter (or...

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Dexter Flaw Discovered; Funds are Safe

TL;DR: A flaw was found in the camlCase’s Dexter contract. The funds have been removed from the contract and returned to their original holders. A high level explanation follows; technical details of the Dexter flaw will be described in a separate post to come. As many of you know, we have been working on a new Tezos upgrade proposal. This proposal, if accepted, will change the calling convention from breadth first ordering to depth first ordering. In...

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The Protocol: from High-level Command Line to Low-level Operations

Understanding the source code of Tezos may take much time for fresh contributors. This gentle note gives a global presentation of the control flow of a simple transaction example, going from the high-level command line call to the low-level account operations.

This note explains and illustrates flow of control in Tezos using the example of carrying out a simple transaction. We will go from the high-level command line call to the low-level account operations. To guide you through the codebase, we give line numbers based on release 8.2 (commit 6102c808). Where do I start? Our scenario. Imagine that Alice and Bob have one account each, and Alice wants to send ꜩ10 from her account...

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Edo, the latest Tezos upgrade, is LIVE

This is a joint announcement from Nomadic Labs, Marigold, and DaiLambda. On 13 February 2021, the Tezos blockchain successfully upgraded by adopting Edo at block 1,343,489. Jointly developed by Nomadic Labs, Marigold, DaiLambda, and Metastate, Edo is the fifth Tezos upgrade in the span of two years, and follows the Delphi upgrade of three months ago. The Tezos blockchain currently allows protocol upgrades every several months, and we intend for the foreseeable future to take advantage of...

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