Overledger 2.1.5 release


Overledger 2.1.5 enables licence fees

Among the enhancements to the latest version of Overledger is the ability to pay licences in QNT.

1. Ability to pay Overledger licence fees in QNT  

From 15 December 2021, developers wanting to access MainNet via Overledger will be required to pay an annual licence fee (£100). This can now be paid in QNT, using Metamask. Existing users will have free access to Overledger (MainNet) until 15 March 2022, after which the annual fee will be required.

User documentation can be found here 

2. Backend functionality for token issuance

Developers will be able use Overledger’s API to choose which QRC20 functions they want to include in a Smart Contract, and DLT fees can be paid using Metamask.
QRC20 is the new multi-DLT standard for digital assets developed by Quant. Its purpose is to unlock single-DLT limitations for new digital assets and tokens.
User documentation can be found here

For more details, see the full release notes: Release Notes 2.1.5
Get started today: www.quant.network/developer-programme


Overledger 2.x

Overledger 1.x


OAuth 2.0 standard (allowing SSO)

Proprietary (BPI Keys)


In API, seamless updates

In SDK, re-download for updates


Full abstraction across all DLTs

Partial, DLT-specific edge cases

RCG Framework

REST / JSON APIs from OVL Core

Proprietary P2P (experimental)

Time to Deploy

32 minutes (CI / CD pipelines)

1-2 weeks

QNT Utility Token / Treasury

Optimised, audited smart contracts

Experimental smart contracts


Optimised to scale fast – 23 Microservices

Hardened proof of concept
– 9 Microservices

Transaction Routing Algorithm

6 factor, game theory optimised

Experimental P2P emergent


Cloud native (scaling / resilience)

Standalone DB deployments

Cross-DLT Implementation

REST API calls direct to OVL, integrated smart contract back end

SDK-based Javascript 
apps call smart contract functions
via OVL

2021 Achievements

50% Quant team has grown by over 50% and will continue to do so 

OVL1.0 to 2.0 Release schedule accelerated, moved to much more frequent automated updates
– Previously, last major update was seven months, then in early 2021 moved to three months (Jan and March)
and then to monthly (April and May). We’re now moving to fortnightly releases. 

2.5X Overledger is now 2.5x bigger (April)  

2.0 Re-engineered the entire 2.0 architecture

Open API 3.0 for easy integration into developer workflows

OAuth 2.0 for single sign on for enterprise customers    

Cloud Native Scalable and resilient already, now deployable automatically 

Native Transactions 

OVL 2.0 Developer portal 2.0