ICON Developer Portal

ICON Developer Portal

ICON Network is a decentralized smart contract protocol based on ‘loopchain’, a high-performance blockchain engine. The ICON Network aims to remove barriers among different blockchains and allow them to exchange values without intermediaries. By realizing this goal, ICON will realize the mass adoption of blockchain technology and Hyperconnect the World.

Get Started


The source code is found on GitHub at https://github.com/icon-project/t-bears

T-Bears is a suite of development tools for SCORE. T-Bears provides a project template for SCORE to help you start right away. You can code and test your smart contract locally in an emulated environment, and when ready, deploy SCORE onto the ICON network from the command-line interface.
Below is the runtime view of the T-Bears.



A module that handles ICON JSON-RPC API request and sends a response back to the client.

ICON Service

A module that manages the lifecycle of SCORE and its execution. SCORE's state transition is stored in a database.

T-Bears CLI

T-Bears Command Line Interface. Supports the following functions :

  • Manage T-Bears Service
  • Deploy SCORE
  • Send transactions
  • Send query requests

For the details, see CLI Commands.

T-Bears Block Manager

LoopChain emulator for T-Bears Service. It does not have full 'consensus' and 'peer management' functions. This module handles transaction requests and emulates block generation.

Message queue

Message queue is used for inter-component communication.



This project follows the Apache 2.0 License. Please refer to LICENSE for details.

Updated about a year ago


The source code is found on GitHub at https://github.com/icon-project/t-bears

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