468 lines
14 KiB
Go
468 lines
14 KiB
Go
// Copyright 2017-2021 DERO Project. All rights reserved.
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// Use of this source code in any form is governed by RESEARCH license.
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// license can be found in the LICENSE file.
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// GPG: 0F39 E425 8C65 3947 702A 8234 08B2 0360 A03A 9DE8
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//
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package walletapi
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import "fmt"
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import "sort"
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import "sync"
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import "time"
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import "bytes"
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import "strings"
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import "math/big"
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import "crypto/rand"
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//import "encoding/json"
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//import "encoding/binary"
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//import "github.com/romana/rlog"
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//import "github.com/vmihailenco/msgpack"
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//import "github.com/deroproject/derohe/config"
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import "github.com/deroproject/derohe/structures"
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import "github.com/deroproject/derohe/crypto"
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import "github.com/deroproject/derohe/crypto/bn256"
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//import "github.com/deroproject/derosuite/crypto/ringct"
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//import "github.com/deroproject/derohe/globals"
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import "github.com/deroproject/derohe/walletapi/mnemonics"
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import "github.com/deroproject/derohe/address"
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import "github.com/deroproject/derohe/transaction"
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//import "github.com/deroproject/derohe/blockchain/inputmaturity"
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type _Keys struct {
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Secret *crypto.BNRed `json:"secret"`
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Public *crypto.Point `json:"public"`
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}
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var Balance_lookup_table *LookupTable
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type Account struct {
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Keys _Keys `json:"keys"`
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SeedLanguage string `json:"seedlanguage"`
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FeesMultiplier float32 `json:"feesmultiplier"` // fees multiplier accurate to 2 decimals
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Ringsize int `json:"ringsize"` // default mixn to use for txs
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mainnet bool
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Height uint64 `json:"height"` // block height till where blockchain has been scanned
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TopoHeight int64 `json:"topoheight"` // block height till where blockchain has been scanned
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Balance_Mature uint64 `json:"balance_mature"` // total balance of account
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Balance_Locked uint64 `json:"balance_locked"` // balance locked
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Balance_Result structures.GetEncryptedBalance_Result // used to cache last successful result
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Entries []Entry // all tx entries, basically transaction statement
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RingMembers map[string]int64 `json:"ring_members"` // ring members
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Pool Wallet_Pool // wallet pool
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sync.Mutex // syncronise modifications to this structure
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}
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// these structures are completely decoupled from blockchain and live only within the wallet
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// all inputs and outputs which modify balance are presented by this structure
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type Entry struct {
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Height uint64 `json:"height"`
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TopoHeight int64 `json:"topoheight"`
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BlockHash string `json:"blockhash"`
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MinerReward uint64 `json:"minerreward"`
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TransactionPos int `json:"poswithinblock"` // pos within block is negative for coinbase
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Coinbase bool `json:"coinbase"`
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Incoming bool `json:"incoming"`
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TXID crypto.Hash `json:"txid"`
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Amount uint64 `json:"amount"`
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Fees uint64 `json:"fees"`
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PaymentID []byte `json:"payment_id"`
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Proof string `json:"proof"`
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Status byte `json:"status"`
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Unlock_Time uint64 `json:"unlock_time"`
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Time time.Time `json:"time"`
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EWData string `json:"ewdata"` // encrypted wallet balance at that point in time
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Secret_TX_Key string `json:"secret_tx_key"` // can be used to prove if available
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Details structures.Outgoing_Transfer_Details `json:"details"` // actual details if available
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}
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// add a entry in the suitable place
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// this is always single threaded
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func (w *Wallet_Memory) InsertReplace(e Entry) {
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i := sort.Search(len(w.account.Entries), func(j int) bool {
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return w.account.Entries[j].TopoHeight >= e.TopoHeight && w.account.Entries[j].TransactionPos >= e.TransactionPos
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})
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// entry already exists, we are probably rescanning/overwiting, delete anything afterwards
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if i < len(w.account.Entries) && w.account.Entries[i].TopoHeight == e.TopoHeight && w.account.Entries[i].TransactionPos == e.TransactionPos {
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w.account.Entries = w.account.Entries[:i]
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// x is present at data[i]
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} else {
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// x is not present in data,
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// but i is the index where it would be inserted.
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}
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w.account.Entries = append(w.account.Entries, e)
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}
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// generate keys from using random numbers
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func Generate_Keys_From_Random() (user *Account, err error) {
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user = &Account{Ringsize: 4, FeesMultiplier: 1.5}
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seed := crypto.RandomScalarBNRed()
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user.Keys = Generate_Keys_From_Seed(seed)
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return
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}
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// generate keys from seed which is from the recovery words
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// or we feed in direct
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func Generate_Keys_From_Seed(Seed *crypto.BNRed) (keys _Keys) {
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// setup main keys
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keys.Secret = Seed
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keys.Public = crypto.GPoint.ScalarMult(Seed)
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return
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}
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// generate user account using recovery seeds
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func Generate_Account_From_Recovery_Words(words string) (user *Account, err error) {
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user = &Account{Ringsize: 4, FeesMultiplier: 1.5}
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language, seed, err := mnemonics.Words_To_Key(words)
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if err != nil {
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return
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}
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user.SeedLanguage = language
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user.Keys = Generate_Keys_From_Seed(crypto.GetBNRed(seed))
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return
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}
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func Generate_Account_From_Seed(Seed *crypto.BNRed) (user *Account, err error) {
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user = &Account{Ringsize: 4, FeesMultiplier: 1.5}
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// TODO check whether the seed is invalid
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user.Keys = Generate_Keys_From_Seed(Seed)
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return
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}
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// convert key to seed using language
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func (w *Wallet_Memory) GetSeed() (str string) {
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return mnemonics.Key_To_Words(w.account.Keys.Secret.BigInt(), w.account.SeedLanguage)
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}
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// convert key to seed using language
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func (w *Wallet_Memory) GetSeedinLanguage(lang string) (str string) {
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return mnemonics.Key_To_Words(w.account.Keys.Secret.BigInt(), lang)
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}
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func (account *Account) GetAddress() (addr address.Address) {
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addr.PublicKey = account.Keys.Public
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return
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}
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// convert a user account to address
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func (w *Wallet_Memory) GetAddress() (addr address.Address) {
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addr = w.account.GetAddress()
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addr.Mainnet = w.account.mainnet
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return addr
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}
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// get a random integrated address
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func (w *Wallet_Memory) GetRandomIAddress8() (addr address.Address) {
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addr = w.GetAddress()
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// setup random 8 bytes of payment ID, it must be from non-deterministic RNG namely crypto random
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addr.PaymentID = make([]byte, 8, 8)
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rand.Read(addr.PaymentID[:])
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return
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}
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func (w *Wallet_Memory) Get_Balance_Rescan() (mature_balance uint64, locked_balance uint64) {
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return w.Get_Balance()
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}
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// get the unlocked balance ( amounts which are mature and can be spent at this time )
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// offline wallets may get this wrong, since they may not have latest data
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//
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func (w *Wallet_Memory) Get_Balance() (mature_balance uint64, locked_balance uint64) {
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return w.account.Balance_Mature, 0
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}
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// finds all inputs which have been received/spent etc
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// TODO this code can be easily parallelised and need to be parallelised
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// if only the availble is requested, then the wallet is very fast
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// the spent tracking may make it slow ( in case of large probably million txs )
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//TODO currently we do not track POOL at all any where ( except while building tx)
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// if payment_id is true, only entries with payment ids are returned
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// min_height/max height represent topoheight
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func (w *Wallet_Memory) Show_Transfers(available bool, in bool, out bool, pool bool, failed bool, payment_id bool, min_height, max_height uint64) (entries []Entry) {
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// dero_first_block_time := time.Unix(1512432000, 0) //Tuesday, December 5, 2017 12:00:00 AM
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if max_height == 0 {
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max_height = 50000000000
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}
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for _, e := range w.account.Entries {
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if e.Height >= min_height && e.Height <= max_height {
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if in && (e.Incoming || e.Coinbase) {
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if payment_id && len(e.PaymentID) >= 8 {
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entries = append(entries, e)
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} else {
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entries = append(entries, e)
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}
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continue
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}
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if out && !(e.Incoming || e.Coinbase) {
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if payment_id && len(e.PaymentID) >= 8 {
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entries = append(entries, e)
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} else {
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entries = append(entries, e)
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}
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continue
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}
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}
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}
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return
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}
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// gets all the payments done to specific payment ID and filtered by specific block height
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// we do need better structures
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func (w *Wallet_Memory) Get_Payments_Payment_ID(payid []byte, min_height uint64) (entries []Entry) {
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for _, e := range w.account.Entries {
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if e.Height >= min_height {
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if bytes.Compare(payid, e.PaymentID[:]) == 0 {
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entries = append(entries, e)
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}
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}
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}
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return
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}
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// return all payments within a tx there can be only 1 entry
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// NOTE: what about multiple payments
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func (w *Wallet_Memory) Get_Payments_TXID(txid []byte) (entry Entry) {
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for _, e := range w.account.Entries {
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if bytes.Compare(txid, e.TXID[:]) == 0 {
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return e
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}
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}
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return
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}
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// delete most of the data and prepare for rescan
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func (w *Wallet_Memory) Clean() {
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w.account.Entries = w.account.Entries[:0]
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w.account.Balance_Result.Data = ""
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}
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// return height of wallet
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func (w *Wallet_Memory) Get_Height() uint64 {
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return uint64(w.account.Balance_Result.Height)
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}
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// return topoheight of wallet
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func (w *Wallet_Memory) Get_TopoHeight() int64 {
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return w.account.Balance_Result.Topoheight
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}
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func (w *Wallet_Memory) Get_Daemon_Height() uint64 {
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return w.Daemon_Height
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}
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// return topoheight of darmon
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func (w *Wallet_Memory) Get_Daemon_TopoHeight() int64 {
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return w.Daemon_TopoHeight
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}
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func (w *Wallet_Memory) Get_Registration_TopoHeight() int64 {
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return w.account.Balance_Result.Registration
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}
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func (w *Wallet_Memory) Get_Keys() _Keys {
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return w.account.Keys
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}
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// by default a wallet opens in Offline Mode
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// however, if the wallet is in online mode, it can be made offline instantly using this
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func (w *Wallet_Memory) SetOfflineMode() bool {
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current_mode := w.wallet_online_mode
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w.wallet_online_mode = false
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return current_mode
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}
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func (w *Wallet_Memory) SetNetwork(mainnet bool) bool {
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w.account.mainnet = mainnet
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return w.account.mainnet
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}
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func (w *Wallet_Memory) GetNetwork() bool {
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return w.account.mainnet
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}
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// return current mode
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func (w *Wallet_Memory) GetMode() bool {
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return w.wallet_online_mode
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}
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// use the endpoint set by the program
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func (w *Wallet_Memory) SetDaemonAddress(endpoint string) string {
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w.Daemon_Endpoint = endpoint
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return w.Daemon_Endpoint
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}
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// by default a wallet opens in Offline Mode
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// however, It can be made online by calling this
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func (w *Wallet_Memory) SetOnlineMode() bool {
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current_mode := w.wallet_online_mode
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w.wallet_online_mode = true
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if current_mode != true { // trigger subroutine if previous mode was offline
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go w.sync_loop() // start sync subroutine
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}
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return current_mode
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}
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// by default a wallet opens in Offline Mode
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// however, It can be made online by calling this
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func (w *Wallet_Memory) SetRingSize(ringsize int) int {
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defer w.Save_Wallet() // save wallet
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if ringsize >= 2 && ringsize <= 128 { //reasonable limits for mixin, atleastt for now, network should bump it to 13 on next HF
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if crypto.IsPowerOf2(ringsize) {
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w.account.Ringsize = ringsize
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}
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}
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return w.account.Ringsize
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}
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// by default a wallet opens in Offline Mode
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// however, It can be made online by calling this
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func (w *Wallet_Memory) GetRingSize() int {
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if w.account.Ringsize < 2 {
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return 2
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}
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return w.account.Ringsize
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}
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// sets a fee multiplier
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func (w *Wallet_Memory) SetFeeMultiplier(x float32) float32 {
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defer w.Save_Wallet() // save wallet
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if x < 1.0 { // fee cannot be less than 1.0, base fees
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w.account.FeesMultiplier = 2.0
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} else {
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w.account.FeesMultiplier = x
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}
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return w.account.FeesMultiplier
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}
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// gets current fee multiplier
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func (w *Wallet_Memory) GetFeeMultiplier() float32 {
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if w.account.FeesMultiplier < 1.0 {
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return 1.0
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}
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return w.account.FeesMultiplier
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}
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// get fees multiplied by multiplier
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func (w *Wallet_Memory) getfees(txfee uint64) uint64 {
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multiplier := w.account.FeesMultiplier
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if multiplier < 1.0 {
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multiplier = 2.0
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}
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return txfee * uint64(multiplier*100.0) / 100
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}
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// Ability to change seed lanaguage
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func (w *Wallet_Memory) SetSeedLanguage(language string) string {
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defer w.Save_Wallet() // save wallet
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language_list := mnemonics.Language_List()
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for i := range language_list {
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if strings.ToLower(language) == strings.ToLower(language_list[i]) {
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w.account.SeedLanguage = language_list[i]
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}
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}
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return w.account.SeedLanguage
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}
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// retrieve current seed language
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func (w *Wallet_Memory) GetSeedLanguage() string {
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if w.account.SeedLanguage == "" { // default is English
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return "English"
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}
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return w.account.SeedLanguage
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}
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// retrieve secret key for any tx we may have created
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func (w *Wallet_Memory) GetRegistrationTX() *transaction.Transaction {
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var tx transaction.Transaction
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tx.Version = 1
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tx.TransactionType = transaction.REGISTRATION
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add := w.account.Keys.Public.EncodeCompressed()
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copy(tx.MinerAddress[:], add[:])
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c, s := w.sign()
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crypto.FillBytes(c, tx.C[:])
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crypto.FillBytes(s, tx.S[:])
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if !tx.IsRegistrationValid() {
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panic("registration tx could not be generated. something failed.")
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}
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return &tx
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}
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// this basically does a Schnorr Signature on random information for registration
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func (w *Wallet_Memory) sign() (c, s *big.Int) {
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var tmppoint bn256.G1
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tmpsecret := crypto.RandomScalar()
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tmppoint.ScalarMult(crypto.G, tmpsecret)
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serialize := []byte(fmt.Sprintf("%s%s", w.account.Keys.Public.G1().String(), tmppoint.String()))
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c = crypto.ReducedHash(serialize)
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s = new(big.Int).Mul(c, w.account.Keys.Secret.BigInt()) // basicaly scalar mul add
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s = s.Mod(s, bn256.Order)
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s = s.Add(s, tmpsecret)
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s = s.Mod(s, bn256.Order)
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return
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}
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// retrieve secret key for any tx we may have created
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func (w *Wallet_Memory) GetTXKey(txhash crypto.Hash) string {
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for _, e := range w.account.Entries {
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if !e.Coinbase && !e.Incoming && e.TXID == txhash {
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return e.Proof
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}
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}
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return ""
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}
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