40 lines
1.2 KiB
Solidity
40 lines
1.2 KiB
Solidity
pragma solidity ^0.4.24;
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import "../common/RLP.sol";
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library Transaction {
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using RLP for bytes;
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using RLP for RLP.RLPItem;
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struct TX {
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uint64 slot;
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uint32 denomination; // 2**32 more than enough for NFTs, helps pack in 1 slot
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address owner;
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bytes32 hash;
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uint256 prevBlock;
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}
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function getTx(bytes memory txBytes) internal pure returns (TX memory) {
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RLP.RLPItem[] memory rlpTx = txBytes.toRLPItem().toList(4);
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TX memory transaction;
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transaction.slot = uint64(rlpTx[0].toUint());
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transaction.prevBlock = uint256(rlpTx[1].toUint());
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transaction.denomination = uint32(rlpTx[2].toUint());
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transaction.owner = rlpTx[3].toAddress();
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if (transaction.prevBlock == 0) { // deposit transaction
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transaction.hash = keccak256(abi.encodePacked(transaction.slot));
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} else {
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transaction.hash = keccak256(txBytes);
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}
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return transaction;
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}
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function getOwner(bytes memory txBytes) internal pure returns (address owner) {
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RLP.RLPItem[] memory rlpTx = txBytes.toRLPItem().toList(4);
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owner = rlpTx[3].toAddress();
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}
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}
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