// Copyright (c) 2009-2010 Satoshi Nakamoto

// Copyright (c) 2009-2022 The Bitcoin Core developers

// Distributed under the MIT software license, see the accompanying

// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <primitives/transaction.h>

#include <consensus/amount.h>

#include <crypto/hex_base.h>

#include <hash.h>

#include <primitives/transaction_identifier.h>

#include <script/script.h>

#include <serialize.h>

#include <tinyformat.h>

#include <uint256.h>

#include <algorithm>

#include <cassert>

#include <stdexcept>

std::string COutPoint::ToString() const

{

    return strprintf("COutPoint(%s, %u)", hash.ToString().substr(0,10), n);

}

CTxIn::CTxIn(COutPoint prevoutIn, CScript scriptSigIn, uint32_t nSequenceIn)

{

    prevout = prevoutIn;

    scriptSig = scriptSigIn;

    nSequence = nSequenceIn;

}

CTxIn::CTxIn(Txid hashPrevTx, uint32_t nOut, CScript scriptSigIn, uint32_t nSequenceIn)

{

    prevout = COutPoint(hashPrevTx, nOut);

    scriptSig = scriptSigIn;

    nSequence = nSequenceIn;

}

std::string CTxIn::ToString() const

{

    std::string str;

    str += "CTxIn(";

    str += prevout.ToString();

    if (prevout.IsNull())

        str += strprintf(", coinbase %s", HexStr(scriptSig));

    else

        str += strprintf(", scriptSig=%s", HexStr(scriptSig).substr(0, 24));

    if (nSequence != SEQUENCE_FINAL)

        str += strprintf(", nSequence=%u", nSequence);

    str += ")";

    return str;

}

CTxOut::CTxOut(const CAmount& nValueIn, CScript scriptPubKeyIn)

{

    nValue = nValueIn;

    scriptPubKey = scriptPubKeyIn;

}

std::string CTxOut::ToString() const

{

    return strprintf("CTxOut(nValue=%d.%08d, scriptPubKey=%s)", nValue / COIN, nValue % COIN, HexStr(scriptPubKey).substr(0, 30));

}

CMutableTransaction::CMutableTransaction() : version{CTransaction::CURRENT_VERSION}, nLockTime{0} {}

CMutableTransaction::CMutableTransaction(const CTransaction& tx) : vin(tx.vin), vout(tx.vout), version{tx.version}, nLockTime{tx.nLockTime} {}

Txid CMutableTransaction::GetHash() const

{

    return Txid::FromUint256((HashWriter{} << TX_NO_WITNESS(*this)).GetHash());

}

bool CTransaction::ComputeHasWitness() const

{

    return std::any_of(vin.begin(), vin.end(), [](const auto& input) {

        return !input.scriptWitness.IsNull();

    });

}

Txid CTransaction::ComputeHash() const

{

    return Txid::FromUint256((HashWriter{} << TX_NO_WITNESS(*this)).GetHash());

}

Wtxid CTransaction::ComputeWitnessHash() const

{

    if (!HasWitness()) {

        return Wtxid::FromUint256(hash.ToUint256());

    }

    return Wtxid::FromUint256((HashWriter{} << TX_WITH_WITNESS(*this)).GetHash());

}

CTransaction::CTransaction(const CMutableTransaction& tx) : vin(tx.vin), vout(tx.vout), version{tx.version}, nLockTime{tx.nLockTime}, m_has_witness{ComputeHasWitness()}, hash{ComputeHash()}, m_witness_hash{ComputeWitnessHash()} {}

CTransaction::CTransaction(CMutableTransaction&& tx) : vin(std::move(tx.vin)), vout(std::move(tx.vout)), version{tx.version}, nLockTime{tx.nLockTime}, m_has_witness{ComputeHasWitness()}, hash{ComputeHash()}, m_witness_hash{ComputeWitnessHash()} {}

CAmount CTransaction::GetValueOut() const

{

    CAmount nValueOut = 0;

    for (const auto& tx_out : vout) {

        if (!MoneyRange(tx_out.nValue) || !MoneyRange(nValueOut + tx_out.nValue))

            throw std::runtime_error(std::string(__func__) + ": value out of range");

        nValueOut += tx_out.nValue;

    }

    assert(MoneyRange(nValueOut));

    return nValueOut;

}

unsigned int CTransaction::GetTotalSize() const

{

    return ::GetSerializeSize(TX_WITH_WITNESS(*this));

}

std::string CTransaction::ToString() const

{

    std::string str;

    str += strprintf("CTransaction(hash=%s, ver=%u, vin.size=%u, vout.size=%u, nLockTime=%u)\n",

        GetHash().ToString().substr(0,10),

        version,

        vin.size(),

        vout.size(),

        nLockTime);

    for (const auto& tx_in : vin)

        str += "    " + tx_in.ToString() + "\n";

    for (const auto& tx_in : vin)

        str += "    " + tx_in.scriptWitness.ToString() + "\n";

    for (const auto& tx_out : vout)

        str += "    " + tx_out.ToString() + "\n";

    return str;

}