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TypeScript · Hyperledger Fabric

hlf-core

TypeScript framework for Hyperledger Fabric smart contracts

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client.ts
import { TransportFabric } from '@hlf-core/transport';

const transport = new TransportFabric(logger, settings);
await transport.connect();

// single entry point, application signature
const user = await transport.sendListen(
  new UserGetCommand(uid),
);

The problem

Fabric is deliberately low-level, and everything it lacks you have to build yourself: manual work with key-value state, hand-rolled user identity, a token system reinvented every time. And mistakes in exactly these places cost the most, from accounting discrepancies to security holes.

The solution

hlf-core is that layer, built once and proven in production: an ORM approach to state, a single command transport, user identity with replay protection, and a token system with full audit. In other words, less code and predictable security exactly where it is hardest to get right by hand.

What's inside

ORM over key-value

Entities, parent-child relations, pagination and automatic validation — instead of manual getState/putState.

Single command transport

A single entry point into the contract and a command/event model. The same API whether you talk to the blockchain or an ordinary service.

Application signature + nonce

End-user identity on top of Fabric's MSP and protection against transaction replay.

Token system

Emission, transfers, hold, burn, full audit and string arithmetic without loss of precision.

Block and event parsing

Turning raw Fabric blocks into typed data and linking events to transactions.

Batch mode

Several mutating commands run in one transaction — for throughput and endorsement cost.