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# Airdrop

Airdrop is sending tokens simultaneously to multiple addresses. As a rule, the airdrop is used as a part of a marketing campaign to promote a project, increase its recognition, and attract investors.

You can transfer your token to all the active Waves addresses. In this example, we make a list of addresses as follows:

  • get last N blocks from the blockchain;
  • get sender public keys from transactions in these blocks;
  • delete duplicates;
  • convert public keys to addresses.

Please keep in mind that Waves public nodes have limitations listed in the API limitations of the pool of public nodes article. We recommend to use your own node to perform airdrop.

Make sure that your account has enough WAVES to pay the fee for asset transfers.

import requests
import time
import pywaves as pw

node_url = 'https://nodes-testnet.wavesnodes.com'
pw.setNode(node = node_url, chain = 'testnet')

seed = 'insert your seed here'
my_address = pw.Address(seed=seed)

my_asset = pw.Asset('Ax54puR69NHfxqCE73DkyGHUiRb7Z6tHJZvx6ywWS49')
airdrop_amount = 100

sender_public_keys = []
addresses = []

depth = 10000

# Get blockchain height
blockchain_height = requests.get(f'{node_url}/blocks/height').json()['height']

# Iterate through the last blocks
for i in range(blockchain_height - depth, blockchain_height):

    # Get all the transactions of the block
    try:
        response =  requests.get(f'{node_url}/blocks/at/{i}')
        transactions = response.json()['transactions']
    except ValueError:
        print('Error retrieving block ', i, '\nHTTP response code: ', response)

    # Extract public keys
    for transaction in transactions:
        if transaction['senderPublicKey'] not in sender_public_keys:
            sender_public_keys.append(transaction['senderPublicKey'])

    # time.sleep(1) # Only 1 block per second if you use public Mainnet nodes

# Convert public keys to address
for public_key in sender_public_keys:
    try:
        response = requests.get(f'{node_url}/addresses/publicKey/{public_key}')
        addresses.append(response.json()['address'])
    except ValueError:
        print('Error getting address from public key ', public_key, '\nHTTP response code: ', response)

# Send token to the addresses
for address in addresses:
    address_obj = pw.Address(address)
    my_address.sendAsset(address_obj, my_asset, airdrop_amount)
Tokenization
Payments