to decrease(burn) lp token
(address from, uint value) ⇒ none
from: 0xED98485593D5865E892f823e1f66FB99fE64F639(my wallet address)
value: 18265152.653
v2-core/contracts/UniswapV2ERC20.sol(LP token contracts)
function _burn(address from, uint value) internal {
balanceOf[from] = balanceOf[from].sub(value); // sub means "-"
totalSupply = totalSupply.sub(value);
//address(0) is used to burn token.
//It has no private key, so anyone can't withdraw.
emit Transfer(from, address(0), value);
}
https://github.com/Uniswap/v2-core/blob/master/contracts/UniswapV2ERC20.sol#L46