Overledger 2.1.3 includes significant enhancements


Among the enhancements to the latest version of Overledger are a simpler API call process, increased multi-DLN connectivity and payments integration

Among the major enhancements in the latest release of Overledger are:

1. Simplified API call handling
As part of improving user experience for mDApp developers, Overledger’s current 2-stage process for API calls (prepare and execute) can now be reduced to a single stage (Auto Prepare and Execute). In this new model, fees are automatically accepted and the execution goes ahead immediately.

The Auto Prepare and Execute model supports:
(a) Transaction search: prepares and automatically executes the transaction search on the requested DLT.
Sandbox: POST https://api.sandbox.overledger.io/v2/autoexecution/search/transaction  
Production : POST https://api.overledger.io/v2/autoexecution/search/transaction  
API documentation is here

(b) Block search: prepares and automatically executes the block search on the requested DLT.
Sandbox: POST https://api.sandbox.overledger.io/v2/autoexecution/search/block
Production: POST https://api.overledger.io/v2/autoexecution/search/block  
API documentation is here

(c) Address balance search: prepares and automatically executes the address balance search on the requested DLT.
Sandbox: POST https://api.sandbox.overledger.io/v2/autoexecution/search/address/balance  
Production : POST https://api.overledger.io/v2/autoexecution/search/address/balance  
API documentation is here

(d) Address sequence search: prepares and automatically executes the address sequence search on the requested DLT.
Sandbox: POST https://api.sandbox.overledger.io/v2/autoexecution/search/address/sequence  
Production : POST https://api.overledger.io/v2/autoexecution/search/address/sequence  
API documentation is here

2. Scalability update
This has two dimensions:
(a) Multiple DLNs: Overledger can now connect to more DLNs of the same type, regardless of DLT, and we are now connecting to multiple Besu networks in private deployments.
(b) DLN Data Translation: The horizontal scalability of the translation layer in Overledger has been increased by moving some of the translation logic further down the application stack.

For more details, see the full release notes: Release notes 2.1.3

Get started today: https://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