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'''Logos Blockchain''' is the blockchain module of the [[Logos]] technology stack. Logos describes it as "Privacy-preserving, decentralised computing and consensus." It was formerly called Nomos. Together with [[Logos Storage]] and [[Logos Messaging]] it makes up the initial Logos stack, and people run it on their own machines through [[Basecamp]]. As of November 2026 it runs on a public [[Testnet]].
'''Logos Blockchain''' is the blockchain module of the [[Logos]] technology stack, providing privacy-preserving, decentralised computing and consensus. It was formerly called Nomos. With [[Logos Storage]] and [[Logos Messaging]] it makes up the initial Logos stack, which people run on their own machines through [[Basecamp]]. As of November 2026 it runs on a public [[Testnet]].


== What it does ==
== What it does ==
The Logos documentation calls the blockchain "the foundational infrastructure of the Logos technology stack". It gives Logos applications a common context for interaction and lets them rely on the consensus guarantees of the whole network. The documentation says nodes "can participate with consumer hardware and any amount of stake."
The blockchain is the foundational infrastructure of the Logos stack. It gives Logos applications a common context for interaction and lets them rely on the consensus guarantees of the whole network. Nodes can take part with consumer hardware and any amount of stake.


The Logos website describes what developers can do on the Logos Execution Zone (LEZ), the first Zone built on the blockchain (see below). It says they can "deploy programs, run AMMs, transfer tokens, and build financial primitives with built-in privacy." AMMs, or automated market makers, are programs that let people trade tokens against a shared pool.
On the Logos Execution Zone (LEZ), the first Zone built on the blockchain, developers can deploy programs, transfer tokens and build financial primitives with built-in privacy. They can also run automated market makers (AMMs), programs that let people trade tokens against a shared pool.


The Logos activist course ''Building a Parallel Society'' (2026) describes what the module enables. It says many independent machines agree on what happened and run shared rules as written, so that no one can rewrite the record afterwards. It lists uses such as "a treasury, a membership roll, a vote, an agreement that executes as agreed", and accounts that can be public or private "so a group's business is not everyone's business." The course says the module removes "the ability to exclude participation and the ability to edit the record."
The Logos activist course ''Building a Parallel Society'' (2026) presents the module as a way to keep a shared record that no one can rewrite afterwards. In its description, many independent machines agree on what happened and run shared rules as written. The course suggests uses such as a treasury, a membership roll, a vote or an agreement that executes as agreed. Accounts, it adds, can be public or private, "so a group's business is not everyone's business." On this account the module takes away two powers: the power to exclude people from taking part and the power to edit the record.


The documentation describes two building blocks for shared records of this kind.
Two building blocks support shared records of this kind.
* '''Logos SQL''' is a library that gives each participant a local SQLite database and shares the history of writes through the blockchain. The documentation says it suits "participants who need shared data without relying on one organisation to host the database for everyone."
* '''Logos SQL''' is a library that gives each participant a local SQLite database and shares the history of writes through the blockchain. It is meant for participants who need shared data without relying on one organisation to host the database for everyone.
* '''Shared private accounts''' on the LEZ let every member of a group derive the same keys from one group master secret (GMS). The documentation warns that "any GMS holder can derive every key and spend the account." A rule that needs several members to approve has to be written into the program.
* '''Shared private accounts''' on the LEZ let every member of a group derive the same keys from one group master secret (GMS). Any GMS holder can therefore derive every key and spend from the account, so a rule that needs several members to approve has to be written into the program.


== How it works ==
== How it works ==
The documentation describes two layers.
The blockchain has two layers.
* '''Bedrock''' is the base layer. It is "a large-scale validator network" that provides consensus, data availability and lightweight verification. Consensus is the process by which nodes agree on one record. Data availability means that the data behind each block can be fetched by anyone who needs to check it. Bedrock's consensus protocol, Cryptarchia, is a form of Private Proof of Stake, in which nodes take part in proportion to the tokens they hold. The Logos website says this is a mechanism "where validator identities and stake amounts remain hidden."
* '''Bedrock''' is the base layer, a large-scale validator network that provides consensus, the process by which nodes agree on one record. It also provides lightweight verification and data availability, which means anyone who needs to check a block can fetch the data behind it. Its consensus protocol, Cryptarchia, is a form of Private Proof of Stake in which nodes take part in proportion to the tokens they hold. Logos says it is designed to keep validator identities and stake amounts hidden.
* '''Zones''' are Layer 2 blockchains that sit on Bedrock. A Layer 2 is a chain that runs on top of another and relies on it for consensus and data availability. "Applications do not run directly on Bedrock." Each Zone sets its own rules for how its records change and relies on Bedrock for consensus. The main example is the LEZ, described as "the initial Zone for the messaging and storage applications of the Logos stack, with support for private token transfers and program execution."
* '''Zones''' are Layer 2 blockchains, chains that run on top of Bedrock and rely on it for consensus and data availability. Applications do not run directly on Bedrock. Each Zone sets its own rules for how its records change. The main example is the LEZ, the initial Zone for the messaging and storage applications of the Logos stack, with support for private token transfers and program execution.


A third part, the '''Blend Network''', is a service in which declared Blend nodes "provide network-level privacy for block proposers participating in consensus." Block proposers are the nodes that add new blocks to the chain. The documentation says Blend "virtually eliminates the chance of linking a block proposer or transaction sender to their block or transaction".
A third part, the '''Blend Network''', uses a set of declared Blend nodes to give network-level privacy to block proposers taking part in consensus. Block proposers are the nodes that add new blocks to the chain. The documentation says Blend "virtually eliminates the chance of linking a block proposer or transaction sender to their block or transaction".


=== Two kinds of privacy ===
=== Two kinds of privacy ===
The Blockchain FAQ separates the privacy of the people who run the network from the privacy of transactions. It says Bedrock "is designed primarily to protect the privacy of block proposers." If proposers could be identified, the FAQ says, "they could become targets for coercion or denial of service attacks by hostile actors." Transfers on Bedrock itself are public. The FAQ says "Notes and their transfers are recorded openly on the ledger, similar to Bitcoin". Notes are the token units of Bedrock's ledger. The FAQ leaves transaction privacy to the Zones and says it "is supported natively on the LEZ, in addition to public transactions".
Logos separates two kinds of privacy. Bedrock protects the people who run the network. Its block proposers, the nodes that add new blocks, are meant to stay anonymous, so that hostile actors cannot easily target them with coercion or denial-of-service attacks. Transactions on Bedrock itself are public. Notes, its token units, and their transfers are recorded openly, much as on Bitcoin. Private transactions happen one layer up, in the Zones. The LEZ supports both private and public transactions.


The node software is open source in the logos-blockchain organisation on GitHub. Its README says it "combines zero-knowledge proofs, a mix network for anonymity, and a modular service architecture". A zero-knowledge proof shows that a statement is true without revealing the data behind it. A mix network passes messages through several relays that shuffle them, so that observers cannot easily tell who sent what. The node is "the reference implementation of the Logos Blockchain specifications".
The node software is the reference implementation of the Logos Blockchain specifications and is open source in the logos-blockchain organisation on GitHub. It combines a modular service architecture with zero-knowledge proofs, which show a statement is true without revealing the data behind it. It also uses a mix network, which passes messages through several relays that shuffle them so observers cannot easily tell who sent what.


The documentation notes that its overview describes the blockchain "as it will exist on mainnet", and that some features "may not be available on the current testnet."
The documentation's overview describes the blockchain as it will exist on mainnet, and some features may not be available on the current testnet.


== In Basecamp ==
== In Basecamp ==
Basecamp includes a Blockchain app. The Logos website says it lets a user run a node and track its status, peers, rewards and mining. Basecamp also has an LEZ Wallet that holds LEZ tokens on the user's own machine.
Basecamp includes a Blockchain app for running a node and tracking its status, peers, rewards and mining. It also has an LEZ Wallet that holds LEZ tokens on the user's own machine.


The Logos procedure for running a node from Basecamp is written for Testnet v0.3. The user opens the Applications section with Discover Applications and installs the Blockchain app from the Blockchain category, which brings in the Blockchain Module as its core module. The procedure sets both to version 0.3.2. The app then sets up the node through a Quick start or an Advanced wizard, which writes a configuration and creates keys. Once set up, the node connects to testnet peers and syncs the chain. Port forwarding is not required. For the testnet the procedure asks for an SSD with 1 to 2 GB free. It lists Linux, Apple Silicon Macs and Windows 11 through WSL2, the Windows subsystem for Linux, since the node has no native Windows build.
The Logos procedure for running a node from Basecamp is written for Testnet v0.3. The user installs the Blockchain app from the Blockchain category, found under Discover Applications in the Applications section. The app brings in the Blockchain Module as its core module, and the procedure sets both to version 0.3.2. A Quick start or Advanced wizard then writes a configuration and creates keys. After that the node connects to testnet peers and syncs the chain, with no need for port forwarding. The testnet needs an SSD with 1 to 2 GB free. The node runs on Linux, Apple Silicon Macs and Windows 11 through WSL2, the Windows subsystem for Linux, since it has no native Windows build.


A node proposes blocks only once its wallet holds testnet notes. The procedure says "Notes can be obtained by engaging in PoW mining", that is, by proof-of-work computation on the user's own machine. Logos calls this mechanism EmPoWering and introduced it with Testnet v0.3. Logos says "EmPoWering adds another route in". Testnet tokens usually come from a faucet, a service the project runs that hands out free tokens. Logos says it means "nobody needs to approve a request before a new participant can hold tokens and start transacting." The procedure says new tokens can take up to 3.5 hours to count towards consensus. Each block a node leads "mints a reward voucher", which the app's Rewards tab redeems into spendable balance.
A node proposes blocks only once its wallet holds testnet notes. Testnet tokens usually come from a faucet, a service the project runs that hands out free tokens. Since Testnet v0.3 a node can also earn notes by proof-of-work mining on the user's own machine, a mechanism Logos calls EmPoWering. Logos presents it as another route in, one in which nobody needs to approve a request before a new participant can hold tokens and start transacting. New tokens can take up to 3.5 hours to count towards consensus. Each block a node leads mints a reward voucher, which the app's Rewards tab redeems into spendable balance.


The official module catalogue, logos-co/logos-modules-release on GitHub, lists eleven modules under Logos Blockchain. They include the core node module and its interface, the Execution Zone module and wallet, and token, AMM and price oracle modules. On 1 November 2026 the catalogue pinned the core module at version 0.3.4 and the Blockchain interface at 0.3.5. The catalogue README says a new version becomes visible in Basecamp within a few minutes of being merged.
The official module catalogue, logos-co/logos-modules-release on GitHub, lists eleven modules under Logos Blockchain. Among them are the core node module and its interface, the Execution Zone module and wallet, and token, AMM and price oracle modules. On 1 November 2026 the catalogue pinned the core module at version 0.3.4 and the Blockchain interface at 0.3.5. A new version becomes visible in Basecamp within a few minutes of being merged into the catalogue.


The Logos website states that "Testnet v0.3 is live." The documentation's table of testnet endpoints lists 0.3 as the current version, with a public blockchain explorer at testnet.blockchain.logos.co. A version 0.4 is listed with all endpoints still to be decided.
Testnet v0.3 is live. The documentation's table of testnet endpoints lists 0.3 as the current version, with a public blockchain explorer at testnet.blockchain.logos.co. It also lists a version 0.4, with all endpoints still to be decided.


== In use ==
== In use ==
The [[Tools]] page lists projects built on the LEZ: [[Medusa]], [[Evice Wallet SDK]], [[LNS]], [[LEZ Atomic Swaps]], [[Private Token Balance Attestation]], [[Private M-of-N Multisig]], [[DistributionX]], [[Forum-protocol]] and [[Logos Autonomous Agent]]. It lists three that work with the blockchain node or Bedrock: [[Logos-blockchain-ui (xAlisher)]], [[Node Remote]] and [[SoliCamp]].
The [[Tools]] page lists projects built on the LEZ: [[Medusa]], [[Evice Wallet SDK]], [[LNS]], [[LEZ Atomic Swaps]], [[Private Token Balance Attestation]], [[Private M-of-N Multisig]], [[DistributionX]], [[Forum-protocol]] and [[Logos Autonomous Agent]]. It lists three that work with the blockchain node or Bedrock: [[Logos-blockchain-ui (xAlisher)]], [[Node Remote]] and [[SoliCamp]].


Circles also run nodes. In July 2026 Logos reported that Circles in [[Circles/Lisbon|Lisbon]], [[Circles/Delhi|New Delhi]], Brno, [[Circles/Los Angeles|Los Angeles]], Florianópolis and [[Circles/Rome|Rome]] were running a Logos node. In April 2026 the [[Circles/Mexico City|Mexico City Circle]] reported a live workshop, held in Spanish, on installing and running a node. The [[Circles/Kampala|Kampala Circle]] reports that it is building Transparent SACCO, a ledger on the Logos Blockchain for savings and credit cooperatives, with the LEZ as one of its workstreams. Its October 2026 report says "Money stays in mobile money and bank accounts, while the chain records deposits, approvals and expenses with evidence." See [[Issue 2/Every Shilling Accounted For]].
Circles also run nodes. In July 2026 Logos reported that Circles in [[Circles/Lisbon|Lisbon]], [[Circles/Delhi|New Delhi]], Brno, [[Circles/Los Angeles|Los Angeles]], Florianópolis and [[Circles/Rome|Rome]] were running a Logos node. In April 2026 the [[Circles/Mexico City|Mexico City Circle]] reported a live workshop, held in Spanish, on installing and running a node.
 
The [[Circles/Kampala|Kampala Circle]] reports that it is building Transparent SACCO, a ledger on the Logos Blockchain for savings and credit cooperatives, with the LEZ as one of its workstreams. Under the design in its October 2026 report, money stays in mobile money and bank accounts while the chain records deposits, approvals and expenses with evidence. See [[Issue 2/Every Shilling Accounted For]].


== Names ==
== Names ==
The Logos documentation glossary defines Nomos as "An old name for the Logos Blockchain." The ''Logos Field Guide'' (2026), a guide for anyone publishing or building under Logos, says that "Logos Blockchain was previously known as Nomos." It asks for current module names in public-facing work. It keeps the name Nomos for repo names, older documents, technical history and migration context.
Nomos is an old name for the Logos Blockchain. The ''Logos Field Guide'' (2026), a guide for anyone publishing or building under Logos, records the change and asks for current module names in public-facing work. It keeps the name Nomos for repo names, older documents, technical history and migration context.


== See also ==
== See also ==

Revision as of 23:31, 4 November 2026

Logos Blockchain is the blockchain module of the Logos technology stack, providing privacy-preserving, decentralised computing and consensus. It was formerly called Nomos. With Logos Storage and Logos Messaging it makes up the initial Logos stack, which people run on their own machines through Basecamp. As of November 2026 it runs on a public Testnet.

What it does

The blockchain is the foundational infrastructure of the Logos stack. It gives Logos applications a common context for interaction and lets them rely on the consensus guarantees of the whole network. Nodes can take part with consumer hardware and any amount of stake.

On the Logos Execution Zone (LEZ), the first Zone built on the blockchain, developers can deploy programs, transfer tokens and build financial primitives with built-in privacy. They can also run automated market makers (AMMs), programs that let people trade tokens against a shared pool.

The Logos activist course Building a Parallel Society (2026) presents the module as a way to keep a shared record that no one can rewrite afterwards. In its description, many independent machines agree on what happened and run shared rules as written. The course suggests uses such as a treasury, a membership roll, a vote or an agreement that executes as agreed. Accounts, it adds, can be public or private, "so a group's business is not everyone's business." On this account the module takes away two powers: the power to exclude people from taking part and the power to edit the record.

Two building blocks support shared records of this kind.

  • Logos SQL is a library that gives each participant a local SQLite database and shares the history of writes through the blockchain. It is meant for participants who need shared data without relying on one organisation to host the database for everyone.
  • Shared private accounts on the LEZ let every member of a group derive the same keys from one group master secret (GMS). Any GMS holder can therefore derive every key and spend from the account, so a rule that needs several members to approve has to be written into the program.

How it works

The blockchain has two layers.

  • Bedrock is the base layer, a large-scale validator network that provides consensus, the process by which nodes agree on one record. It also provides lightweight verification and data availability, which means anyone who needs to check a block can fetch the data behind it. Its consensus protocol, Cryptarchia, is a form of Private Proof of Stake in which nodes take part in proportion to the tokens they hold. Logos says it is designed to keep validator identities and stake amounts hidden.
  • Zones are Layer 2 blockchains, chains that run on top of Bedrock and rely on it for consensus and data availability. Applications do not run directly on Bedrock. Each Zone sets its own rules for how its records change. The main example is the LEZ, the initial Zone for the messaging and storage applications of the Logos stack, with support for private token transfers and program execution.

A third part, the Blend Network, uses a set of declared Blend nodes to give network-level privacy to block proposers taking part in consensus. Block proposers are the nodes that add new blocks to the chain. The documentation says Blend "virtually eliminates the chance of linking a block proposer or transaction sender to their block or transaction".

Two kinds of privacy

Logos separates two kinds of privacy. Bedrock protects the people who run the network. Its block proposers, the nodes that add new blocks, are meant to stay anonymous, so that hostile actors cannot easily target them with coercion or denial-of-service attacks. Transactions on Bedrock itself are public. Notes, its token units, and their transfers are recorded openly, much as on Bitcoin. Private transactions happen one layer up, in the Zones. The LEZ supports both private and public transactions.

The node software is the reference implementation of the Logos Blockchain specifications and is open source in the logos-blockchain organisation on GitHub. It combines a modular service architecture with zero-knowledge proofs, which show a statement is true without revealing the data behind it. It also uses a mix network, which passes messages through several relays that shuffle them so observers cannot easily tell who sent what.

The documentation's overview describes the blockchain as it will exist on mainnet, and some features may not be available on the current testnet.

In Basecamp

Basecamp includes a Blockchain app for running a node and tracking its status, peers, rewards and mining. It also has an LEZ Wallet that holds LEZ tokens on the user's own machine.

The Logos procedure for running a node from Basecamp is written for Testnet v0.3. The user installs the Blockchain app from the Blockchain category, found under Discover Applications in the Applications section. The app brings in the Blockchain Module as its core module, and the procedure sets both to version 0.3.2. A Quick start or Advanced wizard then writes a configuration and creates keys. After that the node connects to testnet peers and syncs the chain, with no need for port forwarding. The testnet needs an SSD with 1 to 2 GB free. The node runs on Linux, Apple Silicon Macs and Windows 11 through WSL2, the Windows subsystem for Linux, since it has no native Windows build.

A node proposes blocks only once its wallet holds testnet notes. Testnet tokens usually come from a faucet, a service the project runs that hands out free tokens. Since Testnet v0.3 a node can also earn notes by proof-of-work mining on the user's own machine, a mechanism Logos calls EmPoWering. Logos presents it as another route in, one in which nobody needs to approve a request before a new participant can hold tokens and start transacting. New tokens can take up to 3.5 hours to count towards consensus. Each block a node leads mints a reward voucher, which the app's Rewards tab redeems into spendable balance.

The official module catalogue, logos-co/logos-modules-release on GitHub, lists eleven modules under Logos Blockchain. Among them are the core node module and its interface, the Execution Zone module and wallet, and token, AMM and price oracle modules. On 1 November 2026 the catalogue pinned the core module at version 0.3.4 and the Blockchain interface at 0.3.5. A new version becomes visible in Basecamp within a few minutes of being merged into the catalogue.

Testnet v0.3 is live. The documentation's table of testnet endpoints lists 0.3 as the current version, with a public blockchain explorer at testnet.blockchain.logos.co. It also lists a version 0.4, with all endpoints still to be decided.

In use

The Tools page lists projects built on the LEZ: Medusa, Evice Wallet SDK, LNS, LEZ Atomic Swaps, Private Token Balance Attestation, Private M-of-N Multisig, DistributionX, Forum-protocol and Logos Autonomous Agent. It lists three that work with the blockchain node or Bedrock: Logos-blockchain-ui (xAlisher), Node Remote and SoliCamp.

Circles also run nodes. In July 2026 Logos reported that Circles in Lisbon, New Delhi, Brno, Los Angeles, Florianópolis and Rome were running a Logos node. In April 2026 the Mexico City Circle reported a live workshop, held in Spanish, on installing and running a node.

The Kampala Circle reports that it is building Transparent SACCO, a ledger on the Logos Blockchain for savings and credit cooperatives, with the LEZ as one of its workstreams. Under the design in its October 2026 report, money stays in mobile money and bank accounts while the chain records deposits, approvals and expenses with evidence. See Issue 2/Every Shilling Accounted For.

Names

Nomos is an old name for the Logos Blockchain. The Logos Field Guide (2026), a guide for anyone publishing or building under Logos, records the change and asks for current module names in public-facing work. It keeps the name Nomos for repo names, older documents, technical history and migration context.

See also

Sources

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