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-rw-r--r--packages/contracts/src/2.0.0/forwarder/Forwarder.sol10
-rw-r--r--packages/contracts/src/2.0.0/forwarder/MixinERC721.sol66
-rw-r--r--packages/contracts/src/2.0.0/forwarder/MixinFees.sol (renamed from packages/contracts/src/2.0.0/forwarder/MixinWethFees.sol)8
-rw-r--r--packages/contracts/src/2.0.0/forwarder/MixinForwarderCore.sol (renamed from packages/contracts/src/2.0.0/forwarder/MixinMarketBuyTokens.sol)175
-rw-r--r--packages/contracts/src/2.0.0/forwarder/MixinMarketSellTokens.sol197
-rw-r--r--packages/contracts/src/2.0.0/forwarder/MixinTransfer.sol (renamed from packages/contracts/src/2.0.0/forwarder/MixinERC20.sol)46
6 files changed, 218 insertions, 284 deletions
diff --git a/packages/contracts/src/2.0.0/forwarder/Forwarder.sol b/packages/contracts/src/2.0.0/forwarder/Forwarder.sol
index 38128d93e..0542736a3 100644
--- a/packages/contracts/src/2.0.0/forwarder/Forwarder.sol
+++ b/packages/contracts/src/2.0.0/forwarder/Forwarder.sol
@@ -19,9 +19,8 @@
pragma solidity 0.4.24;
pragma experimental ABIEncoderV2;
-import "./MixinWethFees.sol";
-import "./MixinMarketSellTokens.sol";
-import "./MixinMarketBuyTokens.sol";
+import "./MixinFees.sol";
+import "./MixinForwarderCore.sol";
import "./MixinConstants.sol";
import "../utils/Ownable/Ownable.sol";
@@ -29,10 +28,9 @@ import "../utils/Ownable/Ownable.sol";
contract Forwarder is
Ownable,
MixinConstants,
- MixinWethFees,
+ MixinFees,
MixinMarketBuyZrx,
- MixinMarketBuyTokens,
- MixinMarketSellTokens
+ MixinForwarderCore
{
uint256 constant internal MAX_UINT = 2**256 - 1;
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinERC721.sol b/packages/contracts/src/2.0.0/forwarder/MixinERC721.sol
deleted file mode 100644
index b5be223b6..000000000
--- a/packages/contracts/src/2.0.0/forwarder/MixinERC721.sol
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
-
- Copyright 2018 ZeroEx Intl.
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-pragma experimental ABIEncoderV2;
-
-import "../utils/LibBytes/LibBytes.sol";
-import "../tokens/ERC721Token/IERC721Token.sol";
-
-
-contract MixinERC721 {
-
- using LibBytes for bytes;
-
- bytes4 constant internal ERC721_RECEIVED = bytes4(keccak256("onERC721Received(address,uint256,bytes)"));
- bytes4 constant internal ERC721_RECEIVED_OPERATOR = bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"));
-
- function onERC721Received(address, uint256, bytes memory)
- public
- pure
- returns(bytes4)
- {
- return ERC721_RECEIVED;
- }
-
- function onERC721Received(address, address, uint256, bytes memory)
- public
- pure
- returns(bytes4)
- {
- return ERC721_RECEIVED_OPERATOR;
- }
-
- function transferERC721Token(
- bytes memory assetData,
- address to
- )
- internal
- {
- // Decode asset data.
- address token = assetData.readAddress(16);
- uint256 tokenId = assetData.readUint256(36);
- bytes memory receiverData = assetData.readBytesWithLength(100);
- IERC721Token(token).safeTransferFrom(
- address(this),
- to,
- tokenId,
- receiverData
- );
- }
-}
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinWethFees.sol b/packages/contracts/src/2.0.0/forwarder/MixinFees.sol
index c8069aa8c..c32658630 100644
--- a/packages/contracts/src/2.0.0/forwarder/MixinWethFees.sol
+++ b/packages/contracts/src/2.0.0/forwarder/MixinFees.sol
@@ -22,14 +22,14 @@ import "../protocol/Exchange/libs/LibMath.sol";
import "./MixinConstants.sol";
-contract MixinWethFees is
+contract MixinFees is
LibMath,
MixinConstants
{
- uint16 constant public PERCENTAGE_DENOMINATOR = 10000; // 9800 == 98%, 10000 == 100%
- uint16 constant public MAX_FEE = 1000; // 10%
- uint16 constant public ALLOWABLE_EXCHANGE_PERCENTAGE = 9500; // 95%
+ uint16 constant public PERCENTAGE_DENOMINATOR = 10000; // 9800 == 98%, 10000 == 100%
+ uint16 constant public MAX_FEE = 1000; // 10%
+ uint16 constant public ALLOWABLE_EXCHANGE_PERCENTAGE = 9500; // 95%
/// @dev Pays the feeRecipient feeProportion of the total takerEthAmount, denominated in ETH
/// @param takerEthAmount The total amount that was transacted in WETH, fees are calculated from this value.
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinMarketBuyTokens.sol b/packages/contracts/src/2.0.0/forwarder/MixinForwarderCore.sol
index 165fec61f..fcc82b705 100644
--- a/packages/contracts/src/2.0.0/forwarder/MixinMarketBuyTokens.sol
+++ b/packages/contracts/src/2.0.0/forwarder/MixinForwarderCore.sol
@@ -20,26 +20,104 @@ pragma solidity 0.4.24;
pragma experimental ABIEncoderV2;
import "../utils/LibBytes/LibBytes.sol";
-import "./MixinWethFees.sol";
+import "./MixinFees.sol";
import "./MixinMarketBuyZrx.sol";
import "./MixinExpectedResults.sol";
-import "./MixinERC20.sol";
-import "./MixinERC721.sol";
+import "./MixinTransfer.sol";
import "./MixinConstants.sol";
import "../protocol/Exchange/libs/LibOrder.sol";
-contract MixinMarketBuyTokens is
+contract MixinForwarderCore is
MixinConstants,
- MixinWethFees,
- MixinMarketBuyZrx,
MixinExpectedResults,
- MixinERC20,
- MixinERC721
+ MixinFees,
+ MixinMarketBuyZrx,
+ MixinTransfer
{
bytes4 public constant ERC20_DATA_ID = bytes4(keccak256("ERC20Token(address)"));
bytes4 public constant ERC721_DATA_ID = bytes4(keccak256("ERC721Token(address,uint256,bytes)"));
+ /// @dev Market sells ETH for ERC20 tokens, performing fee abstraction if required. This does not support ERC721 tokens. This function is payable
+ /// and will convert all incoming ETH into WETH and perform the trade on behalf of the caller.
+ /// This function allows for a deduction of a proportion of incoming ETH sent to the feeRecipient.
+ /// The caller is sent all tokens from the operation.
+ /// If the purchased token amount does not meet an acceptable threshold then this function reverts.
+ /// @param orders An array of Order struct containing order specifications.
+ /// @param signatures An array of Proof that order has been created by maker.
+ /// @param feeOrders An array of Order struct containing order specifications for fees.
+ /// @param feeSignatures An array of Proof that order has been created by maker for the fee orders.
+ /// @param feeProportion A proportion deducted off the incoming ETH and sent to feeRecipient. The maximum value for this
+ /// is 1000, aka 10%. Supports up to 2 decimal places. I.e 0.59% is 59.
+ /// @param feeRecipient An address of the fee recipient whom receives feeProportion of ETH.
+ /// @return FillResults amounts filled and fees paid by maker and taker.
+ function marketSellEthForERC20(
+ LibOrder.Order[] memory orders,
+ bytes[] memory signatures,
+ LibOrder.Order[] memory feeOrders,
+ bytes[] memory feeSignatures,
+ uint16 feeProportion,
+ address feeRecipient
+ )
+ public
+ payable
+ returns (FillResults memory totalFillResults)
+ {
+ uint256 takerEthAmount = msg.value;
+ require(
+ takerEthAmount > 0,
+ "VALUE_GREATER_THAN_ZERO"
+ );
+ // Deduct the fee from the total amount of ETH sent in
+ uint256 ethFeeAmount = payEthFee(
+ takerEthAmount,
+ feeProportion,
+ feeRecipient
+ );
+ uint256 wethSellAmount = safeSub(takerEthAmount, ethFeeAmount);
+
+ // Deposit the remaining to be used for trading
+ ETHER_TOKEN.deposit.value(wethSellAmount)();
+ // Populate the known assetData, as it is always WETH the caller can provide null bytes to save gas
+ // marketSellOrders fills the remaining
+ address makerTokenAddress = LibBytes.readAddress(orders[0].makerAssetData, 16);
+ orders[0].takerAssetData = WETH_ASSET_DATA;
+ if (makerTokenAddress == address(ZRX_TOKEN)) {
+ // If this is ZRX then we market sell from the orders, rather than a 2 step of buying ZRX fees from feeOrders
+ // then buying ZRX from orders
+ totalFillResults = marketSellEthForZRXInternal(
+ orders,
+ signatures,
+ wethSellAmount
+ );
+ } else {
+ totalFillResults = marketSellEthForERC20Internal(
+ orders,
+ signatures,
+ feeOrders,
+ feeSignatures,
+ wethSellAmount
+ );
+ }
+ // Prevent accidental WETH owned by this contract and it being spent
+ require(
+ takerEthAmount >= totalFillResults.takerAssetFilledAmount,
+ "INVALID_MSG_VALUE"
+ );
+ // Ensure no WETH is left in this contract
+ require(
+ wethSellAmount == totalFillResults.takerAssetFilledAmount,
+ "UNACCEPTABLE_THRESHOLD"
+ );
+ // Transfer all tokens to msg.sender
+ transferERC20Token(
+ makerTokenAddress,
+ msg.sender,
+ totalFillResults.makerAssetFilledAmount
+ );
+ return totalFillResults;
+ }
+
/// @dev Buys the exact amount of assets (ERC20 and ERC721), performing fee abstraction if required.
/// All order assets must be of the same type. Deducts a proportional fee to fee recipient.
/// This function is payable and will convert all incoming ETH into WETH and perform the trade on behalf of the caller.
@@ -113,6 +191,85 @@ contract MixinMarketBuyTokens is
return totalFillResults;
}
+ /// @dev Market sells WETH for ERC20 tokens.
+ /// @param orders An array of Order struct containing order specifications.
+ /// @param signatures An array of Proof that order has been created by maker.
+ /// @param feeOrders An array of Order struct containing order specifications for fees.
+ /// @param feeSignatures An array of Proof that order has been created by maker for the fee orders.
+ /// @param wethSellAmount The amount of WETH to sell.
+ /// @return FillResults amounts filled and fees paid by maker and taker.
+ function marketSellEthForERC20Internal(
+ LibOrder.Order[] memory orders,
+ bytes[] memory signatures,
+ LibOrder.Order[] memory feeOrders,
+ bytes[] memory feeSignatures,
+ uint256 wethSellAmount
+ )
+ internal
+ returns (FillResults memory totalFillResults)
+ {
+ uint256 remainingWethSellAmount = wethSellAmount;
+ FillResults memory calculatedMarketSellResults = calculateMarketSellResults(orders, wethSellAmount);
+ if (calculatedMarketSellResults.takerFeePaid > 0) {
+ // Fees are required for these orders. Buy enough ZRX to cover the future market buy
+ FillResults memory feeTokensResults = marketBuyZrxInternal(
+ feeOrders,
+ feeSignatures,
+ calculatedMarketSellResults.takerFeePaid
+ );
+ // Ensure the token abstraction was fair if fees were proportionally too high, we fail
+ require(
+ isAcceptableThreshold(
+ wethSellAmount,
+ safeSub(wethSellAmount, feeTokensResults.takerAssetFilledAmount)
+ ),
+ "UNACCEPTABLE_THRESHOLD"
+ );
+ remainingWethSellAmount = safeSub(remainingWethSellAmount, feeTokensResults.takerAssetFilledAmount);
+ totalFillResults.takerFeePaid = feeTokensResults.takerFeePaid;
+ totalFillResults.takerAssetFilledAmount = feeTokensResults.takerAssetFilledAmount;
+ }
+ // Make our market sell to buy the requested tokens with the remaining balance
+ FillResults memory requestedTokensResults = EXCHANGE.marketSellOrders(
+ orders,
+ remainingWethSellAmount,
+ signatures
+ );
+ // Update our return FillResult with the market sell
+ addFillResults(totalFillResults, requestedTokensResults);
+ return totalFillResults;
+ }
+
+ /// @dev Market sells WETH for ZRX tokens.
+ /// @param orders An array of Order struct containing order specifications.
+ /// @param signatures An array of Proof that order has been created by maker.
+ /// @param wethSellAmount The amount of WETH to sell.
+ /// @return FillResults amounts filled and fees paid by maker and taker.
+ function marketSellEthForZRXInternal(
+ LibOrder.Order[] memory orders,
+ bytes[] memory signatures,
+ uint256 wethSellAmount
+ )
+ internal
+ returns (FillResults memory totalFillResults)
+ {
+ // Make our market sell to buy the requested tokens with the remaining balance
+ totalFillResults = EXCHANGE.marketSellOrders(
+ orders,
+ wethSellAmount,
+ signatures
+ );
+ // Exchange does not special case ZRX in the makerAssetFilledAmount, if fees were deducted then using this amount
+ // for future transfers is invalid.
+ uint256 zrxAmountBought = safeSub(totalFillResults.makerAssetFilledAmount, totalFillResults.takerFeePaid);
+ require(
+ isAcceptableThreshold(totalFillResults.makerAssetFilledAmount, zrxAmountBought),
+ "UNACCEPTABLE_THRESHOLD"
+ );
+ totalFillResults.makerAssetFilledAmount = zrxAmountBought;
+ return totalFillResults;
+ }
+
/// @dev Buys an exact amount of an ERC20 token using WETH.
/// @param orders Orders to fill. The maker asset is the ERC20 token to buy. The taker asset is WETH.
/// @param signatures Proof that the orders were created by their respective makers.
@@ -189,7 +346,7 @@ contract MixinMarketBuyTokens is
);
}
// Transfer all purchased tokens to msg.sender
- transferToken(
+ transferERC20Token(
makerTokenAddress,
msg.sender,
marketBuyResults.makerAssetFilledAmount
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinMarketSellTokens.sol b/packages/contracts/src/2.0.0/forwarder/MixinMarketSellTokens.sol
deleted file mode 100644
index f4f509846..000000000
--- a/packages/contracts/src/2.0.0/forwarder/MixinMarketSellTokens.sol
+++ /dev/null
@@ -1,197 +0,0 @@
-/*
-
- Copyright 2018 ZeroEx Intl.
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-pragma experimental ABIEncoderV2;
-
-import "../protocol/Exchange/libs/LibOrder.sol";
-import "../utils/LibBytes/LibBytes.sol";
-import "./MixinWethFees.sol";
-import "./MixinExpectedResults.sol";
-import "./MixinERC20.sol";
-import "./MixinConstants.sol";
-import "./MixinMarketBuyZrx.sol";
-
-
-contract MixinMarketSellTokens is
- MixinConstants,
- MixinWethFees,
- MixinMarketBuyZrx,
- MixinExpectedResults,
- MixinERC20
-{
- /// @dev Market sells ETH for ERC20 tokens, performing fee abstraction if required. This does not support ERC721 tokens. This function is payable
- /// and will convert all incoming ETH into WETH and perform the trade on behalf of the caller.
- /// This function allows for a deduction of a proportion of incoming ETH sent to the feeRecipient.
- /// The caller is sent all tokens from the operation.
- /// If the purchased token amount does not meet an acceptable threshold then this function reverts.
- /// @param orders An array of Order struct containing order specifications.
- /// @param signatures An array of Proof that order has been created by maker.
- /// @param feeOrders An array of Order struct containing order specifications for fees.
- /// @param feeSignatures An array of Proof that order has been created by maker for the fee orders.
- /// @param feeProportion A proportion deducted off the incoming ETH and sent to feeRecipient. The maximum value for this
- /// is 1000, aka 10%. Supports up to 2 decimal places. I.e 0.59% is 59.
- /// @param feeRecipient An address of the fee recipient whom receives feeProportion of ETH.
- /// @return FillResults amounts filled and fees paid by maker and taker.
- function marketSellEthForERC20(
- LibOrder.Order[] memory orders,
- bytes[] memory signatures,
- LibOrder.Order[] memory feeOrders,
- bytes[] memory feeSignatures,
- uint16 feeProportion,
- address feeRecipient
- )
- public
- payable
- returns (FillResults memory totalFillResults)
- {
- uint256 takerEthAmount = msg.value;
- require(
- takerEthAmount > 0,
- "VALUE_GREATER_THAN_ZERO"
- );
- // Deduct the fee from the total amount of ETH sent in
- uint256 ethFeeAmount = payEthFee(
- takerEthAmount,
- feeProportion,
- feeRecipient
- );
- uint256 wethSellAmount = safeSub(takerEthAmount, ethFeeAmount);
-
- // Deposit the remaining to be used for trading
- ETHER_TOKEN.deposit.value(wethSellAmount)();
- // Populate the known assetData, as it is always WETH the caller can provide null bytes to save gas
- // marketSellOrders fills the remaining
- address makerTokenAddress = LibBytes.readAddress(orders[0].makerAssetData, 16);
- orders[0].takerAssetData = WETH_ASSET_DATA;
- if (makerTokenAddress == address(ZRX_TOKEN)) {
- // If this is ZRX then we market sell from the orders, rather than a 2 step of buying ZRX fees from feeOrders
- // then buying ZRX from orders
- totalFillResults = marketSellEthForZRXInternal(
- orders,
- signatures,
- wethSellAmount
- );
- } else {
- totalFillResults = marketSellEthForERC20Internal(
- orders,
- signatures,
- feeOrders,
- feeSignatures,
- wethSellAmount
- );
- }
- // Prevent accidental WETH owned by this contract and it being spent
- require(
- takerEthAmount >= totalFillResults.takerAssetFilledAmount,
- "INVALID_MSG_VALUE"
- );
- // Ensure no WETH is left in this contract
- require(
- wethSellAmount == totalFillResults.takerAssetFilledAmount,
- "UNACCEPTABLE_THRESHOLD"
- );
- // Transfer all tokens to msg.sender
- transferToken(
- makerTokenAddress,
- msg.sender,
- totalFillResults.makerAssetFilledAmount
- );
- return totalFillResults;
- }
-
- /// @dev Market sells WETH for ERC20 tokens.
- /// @param orders An array of Order struct containing order specifications.
- /// @param signatures An array of Proof that order has been created by maker.
- /// @param feeOrders An array of Order struct containing order specifications for fees.
- /// @param feeSignatures An array of Proof that order has been created by maker for the fee orders.
- /// @param wethSellAmount The amount of WETH to sell.
- /// @return FillResults amounts filled and fees paid by maker and taker.
- function marketSellEthForERC20Internal(
- LibOrder.Order[] memory orders,
- bytes[] memory signatures,
- LibOrder.Order[] memory feeOrders,
- bytes[] memory feeSignatures,
- uint256 wethSellAmount
- )
- internal
- returns (FillResults memory totalFillResults)
- {
- uint256 remainingWethSellAmount = wethSellAmount;
- FillResults memory calculatedMarketSellResults = calculateMarketSellResults(orders, wethSellAmount);
- if (calculatedMarketSellResults.takerFeePaid > 0) {
- // Fees are required for these orders. Buy enough ZRX to cover the future market buy
- FillResults memory feeTokensResults = marketBuyZrxInternal(
- feeOrders,
- feeSignatures,
- calculatedMarketSellResults.takerFeePaid
- );
- // Ensure the token abstraction was fair if fees were proportionally too high, we fail
- require(
- isAcceptableThreshold(
- wethSellAmount,
- safeSub(wethSellAmount, feeTokensResults.takerAssetFilledAmount)
- ),
- "UNACCEPTABLE_THRESHOLD"
- );
- remainingWethSellAmount = safeSub(remainingWethSellAmount, feeTokensResults.takerAssetFilledAmount);
- totalFillResults.takerFeePaid = feeTokensResults.takerFeePaid;
- totalFillResults.takerAssetFilledAmount = feeTokensResults.takerAssetFilledAmount;
- }
- // Make our market sell to buy the requested tokens with the remaining balance
- FillResults memory requestedTokensResults = EXCHANGE.marketSellOrders(
- orders,
- remainingWethSellAmount,
- signatures
- );
- // Update our return FillResult with the market sell
- addFillResults(totalFillResults, requestedTokensResults);
- return totalFillResults;
- }
-
- /// @dev Market sells WETH for ZRX tokens.
- /// @param orders An array of Order struct containing order specifications.
- /// @param signatures An array of Proof that order has been created by maker.
- /// @param wethSellAmount The amount of WETH to sell.
- /// @return FillResults amounts filled and fees paid by maker and taker.
- function marketSellEthForZRXInternal(
- LibOrder.Order[] memory orders,
- bytes[] memory signatures,
- uint256 wethSellAmount
- )
- internal
- returns (FillResults memory totalFillResults)
- {
- // Make our market sell to buy the requested tokens with the remaining balance
- totalFillResults = EXCHANGE.marketSellOrders(
- orders,
- wethSellAmount,
- signatures
- );
- // Exchange does not special case ZRX in the makerAssetFilledAmount, if fees were deducted then using this amount
- // for future transfers is invalid.
- uint256 zrxAmountBought = safeSub(totalFillResults.makerAssetFilledAmount, totalFillResults.takerFeePaid);
- require(
- isAcceptableThreshold(totalFillResults.makerAssetFilledAmount, zrxAmountBought),
- "UNACCEPTABLE_THRESHOLD"
- );
- totalFillResults.makerAssetFilledAmount = zrxAmountBought;
- return totalFillResults;
- }
-
-}
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinERC20.sol b/packages/contracts/src/2.0.0/forwarder/MixinTransfer.sol
index 23c130d69..78a542892 100644
--- a/packages/contracts/src/2.0.0/forwarder/MixinERC20.sol
+++ b/packages/contracts/src/2.0.0/forwarder/MixinTransfer.sol
@@ -17,13 +17,37 @@
*/
pragma solidity 0.4.24;
+pragma experimental ABIEncoderV2;
+import "../utils/LibBytes/LibBytes.sol";
+import "../tokens/ERC721Token/IERC721Token.sol";
-contract MixinERC20 {
+
+contract MixinTransfer {
+
+ using LibBytes for bytes;
bytes4 constant internal ERC20_TRANSFER_SELECTOR = bytes4(keccak256("transfer(address,uint256)"));
+ bytes4 constant internal ERC721_RECEIVED = bytes4(keccak256("onERC721Received(address,uint256,bytes)"));
+ bytes4 constant internal ERC721_RECEIVED_OPERATOR = bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"));
+
+ function onERC721Received(address, uint256, bytes memory)
+ public
+ pure
+ returns(bytes4)
+ {
+ return ERC721_RECEIVED;
+ }
+
+ function onERC721Received(address, address, uint256, bytes memory)
+ public
+ pure
+ returns(bytes4)
+ {
+ return ERC721_RECEIVED_OPERATOR;
+ }
- function transferToken(
+ function transferERC20Token(
address token,
address to,
uint256 amount
@@ -64,4 +88,22 @@ contract MixinERC20 {
"TRANSFER_FAILED"
);
}
+
+ function transferERC721Token(
+ bytes memory assetData,
+ address to
+ )
+ internal
+ {
+ // Decode asset data.
+ address token = assetData.readAddress(16);
+ uint256 tokenId = assetData.readUint256(36);
+ bytes memory receiverData = assetData.readBytesWithLength(100);
+ IERC721Token(token).safeTransferFrom(
+ address(this),
+ to,
+ tokenId,
+ receiverData
+ );
+ }
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 07:23:36 +0800