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embark-tutorial-erc721
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Simplifying transfer when buying token

This commit is contained in:
Richard Ramos 2018-06-30 23:09:57 -04:00
parent b3c4745f1a
commit 78b7d601c2
1 changed files with 4 additions and 9 deletions
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13
contracts/SpaceshipToken.sol
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@ -28,13 +28,6 @@ contract SpaceshipToken is ERC721Token("CryptoSpaceships", "CST"), Ownable {
uint[] public shipsForSale;
mapping(uint => uint) indexes; // shipId => shipForSale
function transferSelfOwnedToken(address _to, uint _tokenId) private {
clearApproval(address(this), _tokenId);
removeTokenFrom(address(this), _tokenId);
addTokenTo(_to, _tokenId);
emit Transfer(msg.sender, _to, _tokenId);
}
function mint(bytes _metadataHash,
uint8 _energy,
uint8 _lasers,
@ -73,8 +66,10 @@ contract SpaceshipToken is ERC721Token("CryptoSpaceships", "CST"), Ownable {
// Se debe enviar al menos el precio de la nave
require(msg.value != 0);
// Transferimos la nave
transferSelfOwnedToken(msg.sender, _spaceshipId);
// Transferimos la
// Approbamos directamente para evitar tener que crear una transaccion extra
tokenApprovals[_spaceshipId] = msg.sender;
safeTransferFrom(address(this), msg.sender, _spaceshipId);
// La eliminamos de la lista para venta
uint256 replacer = shipsForSale[shipsForSale.length - 1];