NFTokenOfferID.cpp

#include <xrpl/basics/base_uint.h>
#include <xrpl/json/json_value.h>
#include <xrpl/protocol/LedgerFormats.h>
#include <xrpl/protocol/NFTokenOfferID.h>
#include <xrpl/protocol/SField.h>
#include <xrpl/protocol/STObject.h>
#include <xrpl/protocol/STTx.h>
#include <xrpl/protocol/TER.h>
#include <xrpl/protocol/TxFormats.h>
#include <xrpl/protocol/TxMeta.h>
#include <xrpl/protocol/jss.h>
 
#include <memory>
#include <optional>
 
namespace xrpl {
 
bool
canHaveNFTokenOfferID(std::shared_ptr<STTx const> const& serializedTx, TxMeta const& transactionMeta)
{
    if (!serializedTx)
        return false;
 
    TxType const tt = serializedTx->getTxnType();
    if (!(tt == ttNFTOKEN_MINT && serializedTx->isFieldPresent(sfAmount)) && tt != ttNFTOKEN_CREATE_OFFER)
        return false;
 
    // if the transaction failed nothing could have been delivered.
    if (transactionMeta.getResultTER() != tesSUCCESS)
        return false;
 
    return true;
}
 
std::optional<uint256>
getOfferIDFromCreatedOffer(TxMeta const& transactionMeta)
{
    for (STObject const& node : transactionMeta.getNodes())
    {
        if (node.getFieldU16(sfLedgerEntryType) != ltNFTOKEN_OFFER || node.getFName() != sfCreatedNode)
            continue;
 
        return node.getFieldH256(sfLedgerIndex);
    }
    return std::nullopt;
}
 
void
insertNFTokenOfferID(
    Json::Value& response,
    std::shared_ptr<STTx const> const& transaction,
    TxMeta const& transactionMeta)
{
    if (!canHaveNFTokenOfferID(transaction, transactionMeta))
        return;
 
    std::optional<uint256> result = getOfferIDFromCreatedOffer(transactionMeta);
 
    if (result.has_value())
        response[jss::offer_id] = to_string(result.value());
}
 
}  // namespace xrpl