ISCN-js

Query and submit ISCN via javascript sdk

Install

npm i -S cosmjs-types @cosmjs/stargate @likecoin/iscn-js

Usage

Please refer to *.spec.ts test cases for more example

Query

import { ISCNQueryClient } from '@likecoin/iscn-js';
const client = new ISCNQueryClient();

// optional custom rpc
// await client.connect('https://mainnet-node.like.co/rpc/')

// Query ISCN by ID
const res = await client.queryRecordsById('iscn://likecoin-chain/dLbKMa8EVO9RF4UmoWKk2ocUq7IsxMcnQL1_Ps5Vg80/1');

// Query ISCN by owner
const res = await client.queryRecordsByOwner('cosmos1sf2sc6t37xhd3m0dcaq6h5dz22mtru2ugdwp0v');

Signing

import { ISCNQueryClient, ISCNSigningClient } from '@likecoin/iscn-js';
import { DirectSecp256k1HdWallet } from '@cosmjs/proto-signing';
import { SigningStargateClient, StargateClient } from '@cosmjs/stargate';
import { TxRaw } from 'cosmjs-types/cosmos/tx/v1beta1/tx';

(async() => {
  // Use mnemonic
  const mnemonic = 'surround miss nominee dream gap cross assault thank captain prosper drop duty group candy wealth weather scale put';
  const signer = await DirectSecp256k1HdWallet.fromMnemonic(mnemonic);
  const [wallet] = await signer.getAccounts();

  /* For Keplr, use suggestChain API and config found in
    https://github.com/likecoin/mainnet/ or
    https://github.com/likecoin/testnets/ */

  // await window.keplr.experimentalSuggestChain(config);
  // await window.keplr.enable('likecoin-mainnet-2');
  // const signer = window.getOfflineSigner('likecoin-mainnet-2');
  // const [wallet] = await signer.getAccounts();

  const client = new ISCNQueryClient();
  const signingClient = new ISCNSigningClient();
  await signingClient.connectWithSigner('https://mainnet-node.like.co/rpc/', signer);

  const ISCNPayload = {
    'contentFingerprints': [
      'hash://sha256/9564b85669d5e96ac969dd0161b8475bbced9e5999c6ec598da718a3045d6f2e'
    ],
    'stakeholders': [
      {
        'entity': {
          '@id': 'did:cosmos:5sy29r37gfxvxz21rh4r0ktpuc46pzjrmz29g45',
          'name': 'Chung Wu'
        },
        'rewardProportion': 95,
        'contributionType': 'http://schema.org/author'
      }
    ],
    'type': 'Article',
    'name': '使用矩陣計算遞歸關係式',
    'usageInfo': 'https://creativecommons.org/licenses/by/4.0',
    'keywords': ['matrix', 'recursion'],
  }

  const res = await signingClient.createISCNRecord(wallet.address, ISCNPayload);

  const iscnID = await client.queryISCNIdsByTx(res.transactionHash);


  // Or sign only mode

  const signedTxRaw = await signingClient.createISCNRecord(wallet.address, ISCNPayload, { broadcast: false });
  const txBytes = TxRaw.encode(signedTxRaw).finish();
  const res2 = await signingClient.getSigningStargateClient().broadcastTx(txBytes);
})()