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I have a function in an ERC1155 contract that looks like this:

function foo(uint _id, uint _amm) external{
    safeTransferFrom(address(this), msg.sender, _id, _amm, "");
}

Assume the contract does in fact have the tokens it's attempting to send as it does in the real non-simplified code.

Also I have the onERC1155Received and onERC1155BatchReceived functions copied over from the Open Zeppelin holder code here:

https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC1155/utils/ERC1155Holder.sol

And yet, remix reverts the function because it doesn't have approval to send the tokens. But it's sending it from itself. Anything I am missing here? I'm assuming it has to do with the holding code.

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