Use this script to quickly and simply perform token airdrop from existing ERC20 Token contract on Ethereum

node

npm/yarn install

1. You need to have the private key and public address of that wallet
2. Send tokens you want to do airdrop to that wallet, and necessary ethers for gas usage.

1. prepare the airdrop address list
2. copy it into airdrop_address.txt

1. get the token contract address
2. get the token contract abi from the token contract source code (you can get it on Etherscan using the contract address you get before)
3. copy it into token_contract_abi.txt

If you have setted holder address, holder key, token contract address in script, simply use this

node airdrop.js

Or you can use it in this way

node airdrop.js [Holder address] [Holder key] [Token Contract address]

A example is like this

node airdrop.js  0xC160C39E3c6De4B4E4193cAF7e0769a3E6002482 0x45dec472e5e726ecb7d81cfb08054ea7af6709d0e4be7d44e985960bfbdeedfd 0xB5bcf22CB47c9CacC504903F2c109041e91D7797

Notice that I did not provide a runnable script here, you need to replace [Holder address] [Holder key] [Token Contract address] with your own to run it.

1. When use one holder address to do airdrop, better not use this address to do other transactions at the same time because of ehthereum nonce design

2. An alternative way and more stable way is to deploy smart contract for airdrop, using this way can also avoid potential nonce issue. This will be contributed further.

3. Some important parameters can be changed in script manually. They are AIR_DROP_GAS_PRICE， NODE, DECIMALS, air_drop_amountand AIR_DROP_GAS_LIMIT.

   • AIR_DROP_GAS_PRICE by current network staus
   • air_drop_amount is the number of tokens you want to do airdrop for one address
   • DECIMALS is the decimals of that token, often is 1e18
   • AIR_DROP_GAS_LIMIT is the gas limit of one airdrop transaction. Precisely gas limit can be setted according to the estimation from the estimateGas() function of transfer() function.
   • NODE is setted to determin running airdrop on which network (public main net, public test net and local etc.)

More detailed description can be found in script comments.