import "@thirdweb-dev/contracts/extension/DropSinglePhase1155.sol";

The DropSinglePhase1155 smart contract is an extension meant for distributing ERC1155 tokens.

This extension implements the 'Drop' distribution mechanism: set restrictions such as a price to charge, an allowlist etc. for the public / allowlisted mint of your tokens.

It is recommended to use this extension alongside the LazyMint extension.

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The DropSinglePhase1155 extension is an abstract contract, and expects you to implement the following functions by yourself:

This is an example smart contract demonstrating how to inherit from this extension and override the functions to add (optional) custom functionality.

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.0;

import "@thirdweb-dev/contracts/base/ERC1155Base.sol";
import "@thirdweb-dev/contracts/extension/DropSinglePhase1155.sol";
import "@thirdweb-dev/contracts/lib/CurrencyTransferLib.sol";

/// This is an EXAMPLE of usage of `DropSinglePhase1155` for distributing ERC1155 tokens.

contract ERC1155Drop is
    ERC1155Base,
    DropSinglePhase1155
{

    constructor(
        string memory _name,
        string memory _symbol,
        address _royaltyRecipient,
        uint128 _royaltyBps
    ) ERC1155Base(_name, _symbol, _royaltyRecipient, _royaltyBps) {}

    /// @dev Runs before every `claim` function call.
    function _beforeClaim(
        uint256 _tokenId,
        address _receiver,
        uint256 _quantity,
        address _currency,
        uint256 _pricePerToken,
        AllowlistProof calldata _allowlistProof,
        bytes memory _data
    ) internal virtual override {
      // Your custom implementation logic here
    }

    /// @dev Runs after every `claim` function call.
    function _afterClaim(
        uint256 _tokenId,
        address _receiver,
        uint256 _quantity,
        address _currency,
        uint256 _pricePerToken,
        AllowlistProof calldata _allowlistProof,
        bytes memory _data
    ) internal virtual override {
      // Your custom implementation logic here
    }

    /// @dev Collects and distributes the primary sale value of NFTs being claimed.
    function _collectPriceOnClaim(
        address _primarySaleRecipient,
        uint256 _quantityToClaim,
        address _currency,
        uint256 _pricePerToken
    ) internal virtual override {
        if (_pricePerToken == 0) {
            return;
        }

        uint256 totalPrice = _quantityToClaim * _pricePerToken;

        if (_currency == CurrencyTransferLib.NATIVE_TOKEN) {
            if (msg.value != totalPrice) {
                revert("Must send total price.");
            }
        }

        address saleRecipient = _primarySaleRecipient;
        CurrencyTransferLib.transferCurrency(_currency, msg.sender, saleRecipient, totalPrice);
    }

    /// @dev Transfers the NFTs being claimed.
    function _transferTokensOnClaim(
        address _to,
        uint256 _tokenId,
        uint256 _quantityBeingClaimed
    ) internal virtual override {
        _mint(_to, _tokenId, _quantityBeingClaimed, "");
    }

    /// @dev Checks whether platform fee info can be set in the given execution context.
    function _canSetClaimConditions() internal view virtual override returns (bool) {
        return msg.sender == owner();
    }
}

• ERC1155Drop