Overledger 2.1.4 continues growth path with four enhancements


The ability to pay licenses in QNT and support for SegWit V1.0 are among the four major enhancements in Overledger 2.1.4

Enhancements in this latest release of Overledger include:

1. Auto prepare and execute Smart Contract query  
As part of improving user experience for mDApp developers, Overledger’s “Auto prepare and execute” functionality has been extended to Smart Contract queries and UTXO searches. Overledger will prepare and automatically execute a search on the requested DLT and return information to the mDApp without an additional execute call being required.  

The Auto Prepare and Execute model now supports:

(a) Smart Contract query:  
Sandbox: POST https://api.sandbox.overledger.io/v2/autoexecution/search/smartcontract
Production: POST https://api.overledger.io/v2/autoexecution/search/smartcontract
API documentation is here

(b) UTXO search:  
Sandbox: POST https://api.sandbox.overledger.io/v2/autoexecution/search/utxo
Production: POST https://api.overledger.io/v2/autoexecution/search/utxo
API documentation is here

2. Scalability – DLN Data Validation
Horizontal scalability of Overledger’s translation layer has been further increased by moving some of the data validation logic further down the application stack.  

3. License fee backend implementation
Licenses can now be paid in QNT using a Metamask integration with the Overledger UI. Corresponding front end functionality is planned for an upcoming release.

4. Bitcoin address enhancement
In preparation for a Bitcoin Node upgrade, Overledger now supports SegWit version 1.0 (or higher) addresses.  

For more details, see the full release notes: Release notes 2.1.4
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