4.6 Burn

The Burn operation is defined by the following data structure:

{
  "p": "n20",
  "op": "burn",
  "tick": "note",
  "amt": "1000"
  ... ...
}

Key	Required?	Description
p	Yes	Protocol name, n20, lowercase
op	Yes	Operation name, transfer, lowercase
tick	Yes	Token name, up to 16 bytes, case-insensitive
amt	Yes	Bigint, a large integer representing the quantity to be destroyed, must be greater than 0
...	No	Other variables needed during the transfer operation

If a smart contract was set during the deployment stage, the Burn operation must pass contract validation. If the account has more tokens than the amount to be burned, the excess tokens will be assigned to the first transaction output's token address. Otherwise, it is not necessary to specify a token address.