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add Hooks _afterTokenTransfer for ERC1155 #3104

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add Hooks _afterTokenTransfer for ERC1155 #3104

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41 changes: 41 additions & 0 deletions contracts/token/ERC1155/ERC1155.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -180,6 +180,8 @@ contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
emit TransferSingle(operator, from, to, id, amount);

_doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);

_afterTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data);
}

/**
Expand Down Expand Up @@ -221,6 +223,8 @@ contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
emit TransferBatch(operator, from, to, ids, amounts);

_doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);

_afterTokenTransfer(operator, from, to, ids, amounts, data);
}

/**
Expand Down Expand Up @@ -273,6 +277,8 @@ contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
emit TransferSingle(operator, address(0), to, id, amount);

_doSafeTransferAcceptanceCheck(operator, address(0), to, id, amount, data);

_afterTokenTransfer(operator, address(0), to, _asSingletonArray(id), _asSingletonArray(amount), data);
}

/**
Expand Down Expand Up @@ -304,6 +310,8 @@ contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
emit TransferBatch(operator, address(0), to, ids, amounts);

_doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);

_afterTokenTransfer(operator, address(0), to, ids, amounts, data);
}

/**
Expand Down Expand Up @@ -332,6 +340,8 @@ contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
}

emit TransferSingle(operator, from, address(0), id, amount);

_afterTokenTransfer(operator, from, address(0), _asSingletonArray(id), _asSingletonArray(amount), "");
}

/**
Expand Down Expand Up @@ -365,6 +375,8 @@ contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
}

emit TransferBatch(operator, from, address(0), ids, amounts);

_afterTokenTransfer(operator, from, address(0), ids, amounts, "");
}

/**
Expand Down Expand Up @@ -410,6 +422,35 @@ contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
uint256[] memory amounts,
bytes memory data
) internal virtual {}

/**
* @dev Hook that is called after any token transfer. This includes minting
* and burning, as well as batched variants.
*
* The same hook is called on both single and batched variants. For single
* transfers, the length of the `id` and `amount` arrays will be 1.
*
* Calling conditions (for each `id` and `amount` pair):
*
* - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* of token type `id` will be transferred to `to`.
* - When `from` is zero, `amount` tokens of token type `id` will be minted
* for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
* will be burned.
* - `from` and `to` are never both zero.
* - `ids` and `amounts` have the same, non-zero length.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address operator,
address from,
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {}

function _doSafeTransferAcceptanceCheck(
address operator,
Expand Down