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@appliedblockchain/silentdata-node

v0.4.0

Published

Node.js library for Silent Data

Downloads

13

Readme

Silent Data Node.js Library

Node.js library to interact with Silent Data.

Silent Data leverages hardware secure enclaves with attestation, in particular, Intel SGX in order to enable privacy-preserving retrieval and processing of off-chain data, and generation of cryptographic proofs that are verifiable in blockchain smart contracts.

Installation

npm install @appliedblockchain/silentdata-node

# or

yarn add @appliedblockchain/silentdata-node

Usage

Supported check types: balance, income, instagram and kyc.

Supported blockchains: algorand, polkadot and solana.

Supported countries for balance and income checks: CA, DE, ES, FR, GB, IE, IT, NL and US.

Start

// with ECMAScript module format:
import { silentdata } from 'silentdata'

// with CommonJS module format:
const { silentdata } = require('silentdata')

const silentdataClient = silentdata(
  {
    baseUrl: process.env.SILENTDATA_BASE_URL,
    clientId: process.env.SILENTDATA_CLIENT_ID,
    clientSecret: process.env.SILENTDATA_CLIENT_SECRET,
  }
);

Using checks defaults:

import { silentdata } from 'silentdata'

const silentdataClient = silentdata(
  {
    baseUrl: process.env.SILENTDATA_BASE_URL,
    clientId: process.env.SILENTDATA_CLIENT_ID,
    clientSecret: process.env.SILENTDATA_CLIENT_SECRET,
  },
  {
    checks: {
      redirectUrl: "https://redirect-url.com",
      webhookUrl: "https://webhook-url.com",
    },
  }
);

Checks

To override redirectUrl and webhookUrl from defaults pass new values inside data object.

Create a balance check:

import { CheckType, CheckBlockchain, CheckCountry } from 'silentdata'

const response = await silentdataClient.checks.create({
  type: CheckType.balance,
  data: {
    blockchain: CheckBlockchain.solana,
    walletAddress: "55S3CXGZnQbU6a7SMzbPvyCWg4v8CCUpJMv8tUB5zvMP",
    country: CheckCountry.gb,
    minimumBalance: 500,
  },
})
const { id, url } = response.data

Create an income check:

import { CheckType, CheckBlockchain, CheckCountry } from 'silentdata'

const response = await silentdataClient.checks.create({
  type: CheckType.income,
  data: {
    blockchain: CheckBlockchain.solana,
    walletAddress: "55S3CXGZnQbU6a7SMzbPvyCWg4v8CCUpJMv8tUB5zvMP",
    country: CheckCountry.gb,
    minimumIncome: 500,
  },
})
const { id, url } = response.data

Create an instagram check:

import { CheckType, CheckBlockchain } from 'silentdata'

const response = await silentdataClient.checks.create({
  type: CheckType.instagram,
  data: {
    blockchain: CheckBlockchain.solana,
    walletAddress: "55S3CXGZnQbU6a7SMzbPvyCWg4v8CCUpJMv8tUB5zvMP",
  },
})
const { id, url } = response.data

Create a kyc check:

import { CheckType, CheckBlockchain } from 'silentdata'

const response = await silentdataClient.checks.create({
  type: CheckType.kyc,
  data: {
    blockchain: CheckBlockchain.solana,
    walletAddress: "55S3CXGZnQbU6a7SMzbPvyCWg4v8CCUpJMv8tUB5zvMP",
  },
})
const { id, url } = response.data

Read a check by id:

import { CheckType } from 'silentdata'

const response = await silentdataClient.checks.readById({
  type: CheckType.instagram,
  id,
})
const check = response.data.check

Read checks:

import { CheckType } from 'silentdata'

const response = await silentdataClient.checks.read({
  type: CheckType.instagram,
  limit: 10,
  offset: 1,
})
const checks = response.data.checks

Delete a check by id:

import { CheckType } from 'silentdata'

const response = await silentdataClient.checks.delete({
  type: CheckType.instagram,
  id,
})
const isDeleted = response.data

Check resource:

import { CheckType } from 'silentdata'

const response = await silentdataClient.checks.readById({
  type: CheckType.instagram,
  id,
})
const check = response.data.check
const {
  id,
  date,
  signingKey,
  signature,
  rawData,
  error: { code, message },
} = check.data
const isCancelled = check.isCancelled()
const isCompleted = check.isCompleted()
const isError = check.isError()
const isPending = check.isPending()
const isInProgress = check.isInProgress()
const isCertified = check.isCertified()

Check verification:

import { VerifyCheckError, VerifyCheckErrorCode } from 'silentdata'

try {
  await check.verify()
} catch (error: VerifyCheckError) {
  if (error.code === VerifyCheckErrorCode.invalid_signature) {
    // handle invalid signature error
  }
  // handle other errors
}

Check balance certificate data:

const {
  check_hash,
  id,
  timestamp,
  initiator_pkey,
  certificate_hash,
  currency_code,
  comparison_value,
  server_timestamp,
  server_common_name,
} = balanceCheck.getCertificateDataAsJSON()

Check income certificate data:

const {
  check_hash,
  id,
  timestamp,
  initiator_pkey,
  certificate_hash,
  currency_code,
  comparison_value,
  server_timestamp,
  server_common_name,
} = incomeCheck.getCertificateDataAsJSON()

Check instagram certificate data:

const { 
  check_hash, 
  id, 
  timestamp, 
  initiator_pkey, 
  certificate_hash, 
  ig_username, 
  ig_account_type 
} = instagramCheck.getCertificateDataAsJSON()

Check kyc certificate data:

const { 
  check_hash, 
  id, 
  timestamp, 
  initiator_pkey, 
  certificate_hash, 
  check_timestamp, 
  subject_id 
} = kycCheck.getCertificateDataAsJSON()

Enclaves

Read an enclave by check signingKey:

import { CheckType } from 'silentdata'

const response = await silentdataClient.enclaves.read({
  signingKey: check.data.signingKey
});
const enclave = response.data.enclave
const {
  date,
  mrenclave,
  iasCertChain,
  iasReport,
  iasSignature,
  publicKeys
} = enclave.data
const isActive = enclave.isActive()
const isRevoked = enclave.isRevoked()
const isRetired = enclave.isRetired()
for (const { publicKey, algorithm, usage } of publicKeys) {}

Enclave verification:

import { VerifyEnclaveError, VerifyEnclaveErrorCode } from 'silentdata'

try {
  await enclave.verify()
} catch (error: VerifyEnclaveError) {
  if (error.code === VerifyEnclaveErrorCode.invalid_signature) {
    // handle invalid signature error
  }
  // handle other errors
}