Library for storing keys in IPFS and creating merkle tree

Library provide interface for storing Node operator's key in IPFS and preparing merkle tree and proofs. Part of Lido NestJS Modules.

Install

yarn add @lido-nestjs/offchain-key-storage-client

Ipfs

Usage

This module depends on IpfsModule from @lido-nestjs/ipfs-http-client, so you need to provide it as a global module or import it into IpfsNopKeysModule.

IpfsModule

// global IpfsModule usage

@Module({
  imports: [
    ConfigModule,
    // FetchModule.forRoot(),
    IpfsModule.forRootAsync({
      imports: [CustomFetchModule],
      async useFactory(config: ConfigService) {
        return {
          url: config.get('URL'),
          username: config.get('USERNAME'),
          password: config.get('PASSWORD'),
        };
      },
      inject: [ConfigService],
    }),
    IpfsNopKeysModule.forRoot(),
  ],
})
export class MyModule {}

// IpfsModule as deps of IpfsNopKeysModule

@Module({
  imports: [
    ConfigModule,
    // FetchModule.forRoot(),
    IpfsNopKeysModule.forRoot({
      imports: [
        IpfsModule.forRootAsync({
          imports: [CustomFetchModule],
          async useFactory(config: ConfigService) {
            return {
              url: config.get('URL'),
              username: config.get('USERNAME'),
              password: config.get('PASSWORD'),
            };
          },
          inject: [ConfigService],
        }),
      ],
    }),
  ],
})
export class MyModule {}

NopMerkleTree

// Import
import { Module } from '@nestjs/common';
import { NopMerkleTreeModule } from '@lido-nestjs/offchain-key-storage-client';
import { MyService } from './my.service';

@Module({
  imports: [NopMerkleTreeModule],
  providers: [MyService],
  exports: [MyService],
})
export class MyModule {}

// Usage
import {
  NopMerkleTreeService,
  KeySignBuffer,
} from '@lido-nestjs/offchain-key-storage-client';

export class MyService {
  constructor(private nopMerkleTreeService: NopMerkleTreeService) {}

  myMethod(data: KeySignBuffer[]) {
    return this.nopMerkleTreeService.createTree(data);
  }
}

Example of usage this library https://github.com/lidofinance/lido-offchain-key-lib-test.git