Erc20RewardTransferFacetStorage

This library manages the storage and logic for handling the configuration of reward (output) packets for staking campaigns and facilitates their transfer.

_This implementation is specifically designed for staking campaigns where the reward packet is constructed solely from ERC20 tokens, and where the campaign's reward asset handler is expected to have sufficient balance of the ERC20 assets specified in the reward packet.

IMPORTANT:

• A reward packet can encapsulate one (e.g., tokenA) or more (e.g., tokenA, tokenB, ..., tokenX) ERC20 tokens._

CampaignNotOnCreationStateForSetting

error CampaignNotOnCreationStateForSetting(uint256 campaignId)

Thrown when a targeted campaign is not "On Creation" state, which is required at configurations.

NoRewardPacketDataProvided

error NoRewardPacketDataProvided(uint256 campaignId)

Thrown at setter when no data provided for either tokenAddresses or amountOfTokensPerPacket.

InvalidRewardPacketDataLengths

error InvalidRewardPacketDataLengths(uint256 campaignId, uint256 tokenAddressesLength, uint256 amountOfTokensPerPacketLength)

Thrown at setter when the lengths of tokenAddresses and amountOfTokensPerPacket do not match.

InvalidZeroRewardPacketAddressData

error InvalidZeroRewardPacketAddressData(uint256 campaignId, uint256 index)

Thrown at setter when an element of tokenAddresses is the zero address.

InvalidZeroRewardPacketAmountData

error InvalidZeroRewardPacketAmountData(uint256 campaignId, uint256 index)

Thrown at setter when an element of amountOfTokensPerPacket is zero.

STORAGE_SLOT

bytes32 STORAGE_SLOT

Unique identifier for the storage slot where the Layout struct is stored.

Layout

Struct for managing information related to campaigns' reward packets.

struct Layout {
  mapping(uint256 => struct Erc20RewardTransferFacetStorage.RewardPacket) campaignsPacketInfo;
}

RewardPacket

Struct containing the configuration information for a reward packet.

struct RewardPacket {
  address[] tokenAddresses;
  mapping(address => uint256) amountOfTokensPerPacket;
}

layout

function layout() internal pure returns (struct Erc20RewardTransferFacetStorage.Layout l)

Retrieves a reference to the Layout struct stored at the slot specified by STORAGE_SLOT unique identifier.

setCampaignTransferRewards

function setCampaignTransferRewards(struct Erc20RewardTransferFacetStorage.Layout l, uint256 campaignId, bytes campaignTransferRewardsData) internal returns (address[], uint256[])

Setter function for configuring the reward packet for the specified staking campaign.

_Setter functions are executed during the creation process of campaigns (see CampaignCreationSkeleton.sol).

This setter function configures the reward packet for a campaign, where only ERC20 tokens should be included.

Requirements:

• The tokenAddresses and amountOfTokensPerPacket arrays must have the same length.
• tokenAddresses must contain valid, non-zero ERC20 token addresses.
• amountOfTokensPerPacket must contain non-zero values._

Parameters

transferReward

function transferReward(struct Erc20RewardTransferFacetStorage.Layout l, uint256 campaignId, address from, address to, uint256 amountOfPackets) internal

Transfers the specified amount of a given campaign's reward packets from the from address to the to address.

_This function iteratively executes transfers for all respective amounts of ERC20 tokens defined in the campaign's reward packet (see setCampaignTransferRewards()) in a single transaction.

The amounts to be transferred are calculated as amountOfTokensPerPacket[i] * amountOfPackets for each token in the reward packet, where i is the index of the token in the tokenAddresses array. The transfer is performed using the safeTransferFrom method of the ERC20 token interface._

Parameters