Linkdrop SDK

Linkdrop provides tools to distribute NFTs with links, QR codes or claim codes. The Linkdrop SDK is a Typescript library that can be used to automate creating and managing claim links.

Supported networks

Currently, Linkdrop supports the following networks:

• Ethereum Mainnet
• Polygon Mainnet
• Basic Mainnet

Testnets:

• Goerli (Ethereum testnet)
• Mumbai (Polygon testnet)
• Basic Goerli (Basic testnet)

We can add support of any EVM-based chain by request. Please contact us If you need to use Linkdrop on other networks.

Getting Started

Create a campaign using Linkdrop Dashboard. When creating a campaign you will need to choose how you want to generate links:

• Generate claim links via Dashboard interface.
• Generate claim links via Linkdrop SDK (see "Creating claim links")

Initializing SDK

First, import SDK into your code:

import LinkdropBatchSDK from 'linkdrop-batch-sdk'
// or
// const LinkdropBatchSDK = require('linkdrop-batch-sdk').default

To use SDK on a tesnet:

// initializing Linkdrop SDK on a testnet (Goerli or Mumbai)
const apiKey = /* to request an API key, please contact us at hi@linkdrop.io */
const sdk = new LinkdropBatchSDK({ mode: 'testnets', apiKey });

To use SDK on a production network (Ethereum Mainnet or Polygon):

// initializing Linkdrop SDK on a production network 
const apiKey = /* to request an API key, please contact us at hi@linkdrop.io */
const sdk = new LinkdropBatchSDK({ apiKey });

Claim methods (Can be used on Front-end & Back-end)

The following methods of SDK can be used both in a back-end and a front-end applications, as they don't require providing sensitive campaign keys to invoke them.

Redeeming Link

const txHash = await sdk.redeem(
  claimCode: string,
  destination: string
)

The redeem method is used to redeem a claim link, transferring the specified tokens to the recipient address.

Parameters:

1. claimCode: The claimCode parameter from the claim link URL.
2. destination: The recipient address of the tokens.

The redeem method returns tx hash for the claim transaction.

Getting Link Params

To get claim link params via claim code:

const linkParams = await sdk.getLinkParams(
  claimCode: string
)

To get claim link params via link ID:

const linkParams = await sdk.getLinkParams(
  linkId: string
)

TODO: provide details for linkParams object

Getting Link Status

To retrieve link status and some other info via claim code:

const	{ 
  status,
  recipient,
  linkId,
  txHash,
  claimedAt,
  createdAtBlock,
} = await sdk.getLinkStatus(
  claimCode: string
)

You can also retrieve status by link ID as well:

const	{ 
  status,
  recipient,
  linkId,
  txHash,
  claimedAt,
  createdAtBlock,
} = await sdk.getLinkStatus(
  linkId: string
)

Returns an object with the following properties:

• status: string - The status of the link. Possible values are:
  • "CREATED" - The link has been created but has not yet been claimed.
  • "PENDING" - The link is waiting for the transaction to be confirmed on the blockchain.
  • "CLAIMED" - The link has been successfully claimed.
  • "FAILED" - The claim transaction has failed.
  • "DEACTIVATED" - The link has been deactivated by the campaign creator.
  • "EXPIRED" - The link has expired and can no longer be claimed.
• recipient: string - The Ethereum address to which the tokens have been sent.
• linkId: string - The ID of the link.
• txHash: string - The transaction hash of the claim transaction.
• claimedAt: number - The UNIX timestamp at which the link was claimed.
• createdAtBlock: number - The number of the block in which the link was created.

Managing Campaigns (FOR BACK-END USE ONLY)

⚠️ IMPORTANT! Managing campaigns requires secret keys that should never be exposed to public. Use campaign methods on a back-end and never within a front-end app.

After you have created a campaign using Linkdrop Dashboard, you can use SDK to manage the campaign. Using SDK you can:

• fetch campaign data
• create a new batch of claim links
• add claim links to an existing batch
• fetch created claim links
• activate or deactivate links

Getting Campaign

To be able to do all that, first you need to fetch initialize campaign object

const campaign = await sdk.getCampaign(
  campaignId: string,
  signerKey: string,
  encryptionKey: string
)

Get all params from the campaign page on Dashboard:

• campaignId: ID of the campaign that you want to retrieve information about.
• signerKey: private key used to create claim links. (NEVER EXPOSE SIGNER KEY PUBLICLY)
• encryptionKey: private key used to encode and decode sensitive data stored on server (NEVER EXPOSE ENCRYPTION KEY PUBLICLY)

⚠️ IMPORTANT! Managing campaigns requires secret keys that should never be exposed to public. Use campaign methods on a back-end and never within a front-end app.

The returned campaign object has campaign data and addtional methods to manage the campaign.

TODO: provide campaign data details

console.log(campaign.data)

Creating claim links

Creating new batch

To create a batch of claim links for the campaign, use the campaign.createBatch method

const batch = await campaign.createBatch(
  [{ 
    id: string,
    amount: string,
    links: string,
    weiAmount?: string // optional parameter, The default value is `0`.
  }],
  // optional parameters
  {
    batchDescription: string,
    shortCodeLength: number,
    shortCodeMixRegister: boolean,
    expirationTime: string
  }
)

It takes two parameters:

• linkData: This is a required array of objects that contain information about the links to be created. Each object in the array must have the following properties:

  • id: token ID for ERC721/ERC1155 campaigns. For ERC20 campaigns, id is not provided.
  • amount: amount of tokens per link for ERC20/ERC1155 campaigns. For ERC721 campaigns, amount is not provided.
  • links: number of links to create.
  • weiAmount: amount of network tokens (ETH/MATIC) to be sent to receiver on claim. Campaign contract should have enough network tokens before claim. Top up the campaign contract in advance manually. The default value is 0.

• options: This is an optional object that can contain the following properties:

  • batchDescription: This is an optional string property that specifies the description of the batch. The default value is "Created by SDK".
  • shortCodeLength: The length of claimCode. The default value is 12.
  • shortCodeMixRegister: Should the claim code contain uppercase and lowercase symbols. The default value is true.
  • expirationTime: Timestamp for the link expiration date. The default value is 1900000000000.

The returned batch object contains information related to the specified batch and methods to manage it.

Getting Batches

To retrieve all batches associated with the campaign, call the campaign.getBatches method:

const batches = await campaign.getBatches()

Getting Batch

To manage a batch, first you need to retrieve it by ID:

const batch = await campaign.getBatch(
  batchId: string
) 

The returned batch object contains information related to the specified batch and methods to manage it.
#TODO: provide batch data details

Batch methods

Adding Links to an existing batch

To add claim links to an existing batch, call the batch.addLinks method:

const links = await batch.addLinks(
  [{ 
    id: string, 
    amount: string, 
    links: string, 
    weiAmount?: string // optional parameter, The default value is `0`.
  }], {
    // optional parameters
    shortCodeLength: number,
    shortCodeMixRegister: boolean,
    expirationTime: string
  }
) 

TODO: link codes? It takes two parameters and returns an array of link IDs:

1. links: An array of link objects that contain the following properties:

• id: The token ID (required for ERC721/ERC1155 campaigns).
• amount: The amount of tokens per link (required for ERC20/ERC1155 campaigns).
• links: The number of links to be created.
• weiAmount: The amount of native tokens that should be sent to the proxy contract address manually. The default value is 0.

2. options: This is an optional object that can contain the following properties:

• shortCodeLength: The length of claimCode. The default value is 12.
• shortCodeMixRegister: Should the claim code contain uppercase and lowercase symbols. The default value is true.
• expirationTime: Timestamp for the link expiration date. The default value is 1900000000000.

Getting Links

To fetch all links created for that batch, use the batch.getLinks method:

const links = await batch.getLinks()

Response data includes claim links in format https://claim.linkdrop.io/#/... If you need links in custom format please provide optional parameter to getLinks method

const links = await batch.getLinks('https://wallet.coinbase.com/claim?tk=code&k=<CODE>&c=<CHAIN_ID>&v=3')

As a result you will get claim links with actual claim code (<CODE>) and chain id (<CHAIN_ID>)

Deactivating / reactivating links

Deactivate Link

To deactivate link:

const success = await campaign.deactivate(
  claimCode: string
)

Parameters:

• claimCode: The claimCode parameter from the claim link URL.

Reactivate Link

To reactivatate previosly deactivated link:

const success = await campaign.reactivate(
  claimCode: string
) 

Parameters:

1. claimCode: The claimCode parameter from the claim link URL.

Troubleshooting and getting in touch

• Join Linkdrop Community in Telegram to chat with the team
• Reach us at hi@linkdop.io