symbol シンボル XYM ジム NEM ネム blockchain

Empowering People with Blockchain

Welcome to Symbol & NEM. Empowering the world with robust and easy-to-use Web3 infrastructure!

A public blockchain inspired by NEM

nem logo ネム ロゴ
After the original NEM blockchain launch in 2014, redevelopment under the codename 'Catapult' began with the intention of improving performance, enhancing functionality, and the refining the consensus algorithm. In 2021, 'Symbol' was launched as a distinct blockchain using the completed 'Catapult' codebase. Several months after launch, a successful 'community hard fork' across both NEM and Symbol established a new path forward; this new direction includes an emphasis on engaged community, genuine decenteralization, and a vision of a novel protocol layer facilitating universal cross-chain collaboration that would eventually emerge from NEM and Symbol
What is NEM?

Advanced Functionality

symbol nem functionary background

Symbol has rock solid interfacing and excellent extensibility through its plugin-based architecture. Developers can easily combine and utilize advanced plug-in interfaces inclidng a Command Line Interface, public SDK, and REST APIs. Developers do not have to start from scratch, and off-chain application developement avoids immutable bugs, exposed code, and countless hours spent verifying and debugging before deployment.

Supporting Safe Transactions

Built-in security for multisig signatures
Native support for multi-signature accounts allows up to 25 signatories and up to 3 signatory levels. The combination of multi-signature and multi-level logic approach enables extreme flexibility in approval logic. In the event of one signatory losing their private key or requiring removal, access to the multisig account can be adjusted with the signatures of all the other co-signatories. This facilitates the design of security and flexible operation of the blockchain implementation according to the user's practice.
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Provide a powerful, stable, secure, and fast solid network with a Four-Layered Architecture
The Symbol blockchain is built on a multi-layered node architecture. PeerNodes maintains the network, decentralizing the Symbol chain and recording its transactions and history. APINodes interface with PeerNodes and wallets for transaction requests, history, and the generation of new blocks. API nodes also include Rest Gateways, which facilitate a wide variety of external requests from wallets and custom-built solutions. In addition to REST API gateways, Nodes also include a robust Command Line Interface that helps facilitate localized solutions and plugins. The Symbol Client consists of the wallet and the SDK; it is largely modularised to encourage innovation, ensure security, and simplify updates.
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PoS+ consensus algorithm
Consensus algorithms are shared or mutually agreed upon by all participating nodes in a network, and is used in the generation of new blocks. In Symbol, the PoS+ (Proof of Stake Plus) consensus algorithm is adopted as an improved version of NEM's PoI (Proof of Importance) algorithm. Symbol's PoS+ mechanism allows nodes to periodically 'Harvest' new blocks proportionate to their 'importance'. The PoS+ mechanism considers not only 'amount of staking', but it also promotes the ecosystem’s health by rewarding participants based on their activity score which are counted through 'total fees used by the wallet' and 'number of times of reward in the past', using to discourage the continued concentration of wealth in certain accounts. The POS+ algorithm avoids unnecessary energy waste, and is much more environmentally friendly than the Proof of Work algorythms that secure many blockchains. Node operators and delegators are rewarded for their contribution to the maintainance of the chain via harvesting rewards. These rewards draw from a signifigant pool of XYM allocated for this purpose, and follow a declining reward rate schedule linked to Bitcoin's block reward model.
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News Release

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NEMTUS exhibits at “10th Techn...


NEMTUS exhibits at “10th Technical Book Doujinshi Expo”

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11 companies and organisations...


11 companies and organisations using Symbol for their business will be exhibitin...

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SIP: About the "Symbol Improve...


SIP: About the "Symbol Improvement Proposal"

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April 7, 2024 Post Mortem


On March 30th, at approximately 11:00AM UTC, Toshi alerted the NEM & Symbol Disc...

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symbol-catapult v1.0.3.7 relea...


Symbol-catapult v1.0.3.7 has been released. This release includes upgrades to th...

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NEMTUS is proud to present the...


NEMTUS is proud to present the event "XYM-MONA Fest"

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Symbol blockchain-based DID pl...


Symbol blockchain-based DID platform

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First attempt by a local gover...


First attempt by a local government, Opening Line, Inc supports the issuance of ...

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NFT certificates for the winne...


NFT certificates for the winners of the pickleball tournament

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AMA will be held


AMA will be held

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Meetup "Play with Blockchain" ...


Meetup "Play with Blockchain" in Fukuoka_CANADE Cafe&Bar!

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How to vote for Symbol PoI Vot...


Explains how to set a vote for the symbol PoI Voting

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Release of expo-symbol-sdk for...


The Symbol Blockchain Community is pleased to announce the release of `expo-symb...

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Symbol Blockchain Community La...


Symbol Japan Forum, a DAO dedicated to promoting Symbol blockchain development, ...

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Community Development Symbol S...


Community Development Symbol Software Vol. 1

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symbol-sdk v3 updated


Symbol-sdk v3 updated

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"JUGGLE", a next-generation fi...


"JUGGLE", the next-generation file security system, Opening Line Inc. developed ...

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NEMTUS will appear in the Zaif...


NEMTUS will will appear in a webinar organised by Caica Exchange, managing the c...

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Publication of the Siam Reiwa ...


Publication of the Siam Reiwa (2020) co., ltd. report

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NEMTUS Approved as IVS Crypto ...


NEMTUS, a non-profit organization for the promotion of NEM technology, announced...


Smooth integration into existing systems

symbol sdk description
The core contributors behind NEM learned countless lessons along the way, and these lessons have heavily influenced Symbol. Symbol was designed with usability and extensibility in mind; while wallets profoundly enable the average user, the boundless extensibility provided by the SDK, CLI, and Rest API effectively shatter barriers to development. You do not need to learn cryptography nor a specific programming language in order to profoundly interact with the blockchain; even junior developers and hobbiests can build with ease.
Getting Started with SDKsSDKs Repository

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How to Choose a Wallet

Things to watch out for

Where to consult when you need help

Information for developers


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