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Blockchain LabVENTURE STUDIO

whitepaperConsensus2020

The Diem Blockchain

Diem. Diem Association engineering group.

The technical paper for the Libra, later Diem, payment chain: a permissioned BFT ledger, a Move language for resources, and a reserve-backed currency proposal. The project was wound down in 2022. The paper still matters because Move, and the account model Aptos and Sui started from, was specified here.

The Diem Association wound the project down in 2022. This page is a reading of the paper, not a claim that the network operates.

The problem the paper names

A global payment system that puts every transfer on an anonymous proof-of-work chain inherits that chain's fee market, finality profile and open membership. Diem's paper proposes the opposite defaults: identified validators, a BFT commit, and a programming model where a coin cannot be copied.

What the design proposes

  • Validators are members. Safety is a BFT assumption about that set.
  • Move treats assets as resources. The type system is supposed to stop a module from duplicating them.
  • The currency section describes a basket reserve. That is a legal and custody design, not a consensus theorem.

How the mechanism is specified

  • The consensus chapter specifies a HotStuff-style commit pipeline among the members.
  • Transactions are scripts that call published modules. The paper separates the language from the ledger.
  • On-chain accounts, gas and events are specified as part of one system.

What this page does not treat as proven

  • The association wound the project down in 2022. There is no Diem network to 'use' on the back of this paper.
  • A reserve and a validator set are institutions. The paper does not create the licences they would have needed.
  • Aptos and Sui are not Diem with a new logo. Read their papers for what they changed, including open membership.

Why a venture studio still reads it

Still the right primary source when a venture says 'Move-based' or 'reserve-backed settlement' and cannot name the document those phrases come from. Read it as a design that did not ship, which is information, not a reason to ignore the specification.

This is Blockchain Lab's reading of a public design paper. It is not the paper, not a copy of it, and not an offer of tokens, equity, custody or a partnership. Later network behaviour can diverge from the text. Nothing here is investment, legal or technical advice.