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converter.go
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converter.go
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// Copyright (c) 2018, The Decred developers
// Copyright (c) 2017, The dcrdata developers
// See LICENSE for details.
package insight
import (
"github.com/decred/dcrd/blockchain"
"github.com/decred/dcrd/dcrjson"
"github.com/decred/dcrd/dcrutil"
apitypes "github.com/decred/dcrdata/api/types"
)
// TxConverter converts dcrd-tx to insight tx
func (c *insightApiContext) TxConverter(txs []*dcrjson.TxRawResult) ([]apitypes.InsightTx, error) {
return c.DcrToInsightTxns(txs, false, false, false)
}
// DcrToInsightTxns takes struct with filter params
func (c *insightApiContext) DcrToInsightTxns(txs []*dcrjson.TxRawResult,
noAsm, noScriptSig, noSpent bool) ([]apitypes.InsightTx, error) {
var newTxs []apitypes.InsightTx
for _, tx := range txs {
// Build new InsightTx
txNew := apitypes.InsightTx{
Txid: tx.Txid,
Version: tx.Version,
Locktime: tx.LockTime,
Blockhash: tx.BlockHash,
Blockheight: tx.BlockHeight,
Confirmations: tx.Confirmations,
Time: tx.Time,
Blocktime: tx.Blocktime,
Size: uint32(len(tx.Hex) / 2),
}
// Vins fill
var vInSum, vOutSum float64
for vinID, vin := range tx.Vin {
InsightVin := &apitypes.InsightVin{
Txid: vin.Txid,
Vout: vin.Vout,
Sequence: vin.Sequence,
N: vinID,
Value: vin.AmountIn,
CoinBase: vin.Coinbase,
}
// init ScriptPubKey
if !noScriptSig {
InsightVin.ScriptSig = new(apitypes.InsightScriptSig)
if vin.ScriptSig != nil {
if !noAsm {
InsightVin.ScriptSig.Asm = vin.ScriptSig.Asm
}
InsightVin.ScriptSig.Hex = vin.ScriptSig.Hex
}
}
// Note, this only gathers information from the database which does not include mempool transactions
_, addresses, value, err := c.BlockData.ChainDB.RetrieveAddressIDsByOutpoint(vin.Txid, vin.Vout)
if err == nil {
if len(addresses) > 0 {
// Update Vin due to DCRD AMOUNTIN - START
// NOTE THIS IS ONLY USEFUL FOR INPUT AMOUNTS THAT ARE NOT ALSO FROM MEMPOOL
if tx.Confirmations == 0 {
InsightVin.Value = dcrutil.Amount(value).ToCoin()
}
// Update Vin due to DCRD AMOUNTIN - END
InsightVin.Addr = addresses[0]
}
}
dcramt, _ := dcrutil.NewAmount(InsightVin.Value)
InsightVin.ValueSat = int64(dcramt)
vInSum += InsightVin.Value
txNew.Vins = append(txNew.Vins, InsightVin)
}
// Vout fill
for _, v := range tx.Vout {
InsightVout := &apitypes.InsightVout{
Value: v.Value,
N: v.N,
ScriptPubKey: apitypes.InsightScriptPubKey{
Addresses: v.ScriptPubKey.Addresses,
Type: v.ScriptPubKey.Type,
Hex: v.ScriptPubKey.Hex,
},
}
if !noAsm {
InsightVout.ScriptPubKey.Asm = v.ScriptPubKey.Asm
}
txNew.Vouts = append(txNew.Vouts, InsightVout)
vOutSum += v.Value
}
dcramt, _ := dcrutil.NewAmount(vOutSum)
txNew.ValueOut = dcramt.ToCoin()
dcramt, _ = dcrutil.NewAmount(vInSum)
txNew.ValueIn = dcramt.ToCoin()
dcramt, _ = dcrutil.NewAmount(txNew.ValueIn - txNew.ValueOut)
txNew.Fees = dcramt.ToCoin()
// Return true if coinbase value is not empty, return 0 at some fields
if txNew.Vins != nil && txNew.Vins[0].CoinBase != "" {
txNew.IsCoinBase = true
txNew.ValueIn = 0
txNew.Fees = 0
for _, v := range txNew.Vins {
v.Value = 0
v.ValueSat = 0
}
}
if !noSpent {
// set of unique addresses for db query
uniqAddrs := make(map[string]string)
for _, vout := range txNew.Vouts {
for _, addr := range vout.ScriptPubKey.Addresses {
uniqAddrs[addr] = txNew.Txid
}
}
var addresses []string
for addr := range uniqAddrs {
addresses = append(addresses, addr)
}
// Note, this only gathers information from the database which does not include mempool transactions
addrFull := c.BlockData.ChainDB.GetAddressSpendByFunHash(addresses, txNew.Txid)
for _, dbaddr := range addrFull {
txNew.Vouts[dbaddr.FundingTxVoutIndex].SpentIndex = dbaddr.SpendingTxVinIndex
txNew.Vouts[dbaddr.FundingTxVoutIndex].SpentTxID = dbaddr.SpendingTxHash
txNew.Vouts[dbaddr.FundingTxVoutIndex].SpentHeight = dbaddr.BlockHeight
}
}
newTxs = append(newTxs, txNew)
}
return newTxs, nil
}
// DcrToInsightBlock converts a dcrjson.GetBlockVerboseResult to Insight block.
func (c *insightApiContext) DcrToInsightBlock(inBlocks []*dcrjson.GetBlockVerboseResult) ([]*apitypes.InsightBlockResult, error) {
RewardAtBlock := func(blocknum int64, voters uint16) float64 {
subsidyCache := blockchain.NewSubsidyCache(0, c.params)
work := blockchain.CalcBlockWorkSubsidy(subsidyCache, blocknum, voters, c.params)
stake := blockchain.CalcStakeVoteSubsidy(subsidyCache, blocknum, c.params) * int64(voters)
tax := blockchain.CalcBlockTaxSubsidy(subsidyCache, blocknum, voters, c.params)
return dcrutil.Amount(work + stake + tax).ToCoin()
}
outBlocks := make([]*apitypes.InsightBlockResult, 0, len(inBlocks))
for _, inBlock := range inBlocks {
outBlock := apitypes.InsightBlockResult{
Hash: inBlock.Hash,
Confirmations: inBlock.Confirmations,
Size: inBlock.Size,
Height: inBlock.Height,
Version: inBlock.Version,
MerkleRoot: inBlock.MerkleRoot,
Tx: append(inBlock.Tx, inBlock.STx...),
Time: inBlock.Time,
Nonce: inBlock.Nonce,
Bits: inBlock.Bits,
Difficulty: inBlock.Difficulty,
PreviousHash: inBlock.PreviousHash,
NextHash: inBlock.NextHash,
Reward: RewardAtBlock(inBlock.Height, inBlock.Voters),
IsMainChain: inBlock.Height > 0,
}
outBlocks = append(outBlocks, &outBlock)
}
return outBlocks, nil
}