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service.go
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service.go
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// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package avm
import (
"errors"
"fmt"
"math"
"net/http"
"strings"
"github.com/ava-labs/avalanchego/api"
"github.com/ava-labs/avalanchego/ids"
"github.com/ava-labs/avalanchego/snow/choices"
"github.com/ava-labs/avalanchego/utils/constants"
"github.com/ava-labs/avalanchego/utils/crypto"
"github.com/ava-labs/avalanchego/utils/formatting"
"github.com/ava-labs/avalanchego/utils/json"
"github.com/ava-labs/avalanchego/vms/components/avax"
"github.com/ava-labs/avalanchego/vms/components/verify"
"github.com/ava-labs/avalanchego/vms/nftfx"
"github.com/ava-labs/avalanchego/vms/secp256k1fx"
safemath "github.com/ava-labs/avalanchego/utils/math"
)
const (
// Max number of addresses that can be passed in as argument to GetUTXOs
maxGetUTXOsAddrs = 1024
// Max number of addresses allowed for a single keystore user
maxKeystoreAddresses = 5000
)
var (
errUnknownAssetID = errors.New("unknown asset ID")
errTxNotCreateAsset = errors.New("transaction doesn't create an asset")
errNoHolders = errors.New("initialHolders must not be empty")
errNoMinters = errors.New("no minters provided")
errInvalidAmount = errors.New("amount must be positive")
errNoOutputs = errors.New("no outputs to send")
errSpendOverflow = errors.New("spent amount overflows uint64")
errInvalidMintAmount = errors.New("amount minted must be positive")
errAddressesCantMintAsset = errors.New("provided addresses don't have the authority to mint the provided asset")
errInvalidUTXO = errors.New("invalid utxo")
errNilTxID = errors.New("nil transaction ID")
errNoAddresses = errors.New("no addresses provided")
errNoKeys = errors.New("from addresses have no keys or funds")
)
// Service defines the base service for the asset vm
type Service struct{ vm *VM }
// FormattedAssetID defines a JSON formatted struct containing an assetID as a string
type FormattedAssetID struct {
AssetID ids.ID `json:"assetID"`
}
// IssueTx attempts to issue a transaction into consensus
func (service *Service) IssueTx(r *http.Request, args *api.FormattedTx, reply *api.JSONTxID) error {
service.vm.ctx.Log.Info("AVM: IssueTx called with %s", args.Tx)
encoding, err := service.vm.encodingManager.GetEncoding(args.Encoding)
if err != nil {
return fmt.Errorf("problem getting encoding formatter for '%s': %w", args.Encoding, err)
}
txBytes, err := encoding.ConvertString(args.Tx)
if err != nil {
return fmt.Errorf("problem decoding transaction: %w", err)
}
txID, err := service.vm.IssueTx(txBytes)
if err != nil {
return err
}
reply.TxID = txID
return nil
}
// GetTxStatusReply defines the GetTxStatus replies returned from the API
type GetTxStatusReply struct {
Status choices.Status `json:"status"`
}
// GetTxStatus returns the status of the specified transaction
func (service *Service) GetTxStatus(r *http.Request, args *api.JSONTxID, reply *GetTxStatusReply) error {
service.vm.ctx.Log.Info("AVM: GetTxStatus called with %s", args.TxID)
if args.TxID.IsZero() {
return errNilTxID
}
tx := UniqueTx{
vm: service.vm,
txID: args.TxID,
}
reply.Status = tx.Status()
return nil
}
// GetTx returns the specified transaction
func (service *Service) GetTx(r *http.Request, args *api.GetTxArgs, reply *api.FormattedTx) error {
service.vm.ctx.Log.Info("AVM: GetTx called with %s", args.TxID)
if args.TxID.IsZero() {
return errNilTxID
}
encoding, err := service.vm.encodingManager.GetEncoding(args.Encoding)
if err != nil {
return fmt.Errorf("problem getting encoding formatter for '%s': %w", args.Encoding, err)
}
tx := UniqueTx{
vm: service.vm,
txID: args.TxID,
}
if status := tx.Status(); !status.Fetched() {
return errUnknownTx
}
reply.Tx = encoding.ConvertBytes(tx.Bytes())
reply.Encoding = encoding.Encoding()
return nil
}
// Index is an address and an associated UTXO.
// Marks a starting or stopping point when fetching UTXOs. Used for pagination.
type Index struct {
Address string `json:"address"` // The address as a string
UTXO string `json:"utxo"` // The UTXO ID as a string
}
// GetUTXOsArgs are arguments for passing into GetUTXOs.
// Gets the UTXOs that reference at least one address in [Addresses].
// Returns at most [limit] addresses.
// If specified, [SourceChain] is the chain where the atomic UTXOs were exported from. If empty,
// or the Chain ID of this VM is specified, then GetUTXOs fetches the native UTXOs.
// If [limit] == 0 or > [maxUTXOsToFetch], fetches up to [maxUTXOsToFetch].
// [StartIndex] defines where to start fetching UTXOs (for pagination.)
// UTXOs fetched are from addresses equal to or greater than [StartIndex.Address]
// For address [StartIndex.Address], only UTXOs with IDs greater than [StartIndex.UTXO] will be returned.
// If [StartIndex] is omitted, gets all UTXOs.
// If GetUTXOs is called multiple times, with our without [StartIndex], it is not guaranteed
// that returned UTXOs are unique. That is, the same UTXO may appear in the response of multiple calls.
type GetUTXOsArgs struct {
Addresses []string `json:"addresses"`
SourceChain string `json:"sourceChain"`
Limit json.Uint32 `json:"limit"`
StartIndex Index `json:"startIndex"`
Encoding string `json:"encoding"`
}
// GetUTXOsReply defines the GetUTXOs replies returned from the API
type GetUTXOsReply struct {
// Number of UTXOs returned
NumFetched json.Uint64 `json:"numFetched"`
// The UTXOs
UTXOs []string `json:"utxos"`
// The last UTXO that was returned, and the address it corresponds to.
// Used for pagination. To get the rest of the UTXOs, call GetUTXOs
// again and set [StartIndex] to this value.
EndIndex Index `json:"endIndex"`
// Encoding specifies the encoding format the UTXOs are returned in
Encoding string `json:"encoding"`
}
// GetUTXOs gets all utxos for passed in addresses
func (service *Service) GetUTXOs(r *http.Request, args *GetUTXOsArgs, reply *GetUTXOsReply) error {
service.vm.ctx.Log.Info("AVM: GetUTXOs called for with %s", args.Addresses)
if len(args.Addresses) == 0 {
return errNoAddresses
}
if len(args.Addresses) > maxGetUTXOsAddrs {
return fmt.Errorf("number of addresses given, %d, exceeds maximum, %d", len(args.Addresses), maxGetUTXOsAddrs)
}
encoding, err := service.vm.encodingManager.GetEncoding(args.Encoding)
if err != nil {
return fmt.Errorf("problem getting encoding formatter for '%s': %w", args.Encoding, err)
}
sourceChain := ids.ID{}
if args.SourceChain == "" {
sourceChain = service.vm.ctx.ChainID
} else {
chainID, err := service.vm.ctx.BCLookup.Lookup(args.SourceChain)
if err != nil {
return fmt.Errorf("problem parsing source chainID %q: %w", args.SourceChain, err)
}
sourceChain = chainID
}
addrSet := ids.ShortSet{}
for _, addrStr := range args.Addresses {
addr, err := service.vm.ParseLocalAddress(addrStr)
if err != nil {
return fmt.Errorf("couldn't parse address %q: %w", addrStr, err)
}
addrSet.Add(addr)
}
startAddr := ids.ShortEmpty
startUTXO := ids.Empty
if args.StartIndex.Address != "" || args.StartIndex.UTXO != "" {
addr, err := service.vm.ParseLocalAddress(args.StartIndex.Address)
if err != nil {
return fmt.Errorf("couldn't parse start index address %q: %w", args.StartIndex.Address, err)
}
utxo, err := ids.FromString(args.StartIndex.UTXO)
if err != nil {
return fmt.Errorf("couldn't parse start index utxo: %w", err)
}
startAddr = addr
startUTXO = utxo
}
var (
utxos []*avax.UTXO
endAddr ids.ShortID
endUTXOID ids.ID
)
if sourceChain.Equals(service.vm.ctx.ChainID) {
utxos, endAddr, endUTXOID, err = service.vm.GetUTXOs(
addrSet,
startAddr,
startUTXO,
int(args.Limit),
)
} else {
utxos, endAddr, endUTXOID, err = service.vm.GetAtomicUTXOs(
sourceChain,
addrSet,
startAddr,
startUTXO,
int(args.Limit),
)
}
if err != nil {
return fmt.Errorf("problem retrieving UTXOs: %w", err)
}
reply.UTXOs = make([]string, len(utxos))
for i, utxo := range utxos {
b, err := service.vm.codec.Marshal(utxo)
if err != nil {
return fmt.Errorf("problem marshalling UTXO: %w", err)
}
reply.UTXOs[i] = encoding.ConvertBytes(b)
}
endAddress, err := service.vm.FormatLocalAddress(endAddr)
if err != nil {
return fmt.Errorf("problem formatting address: %w", err)
}
reply.EndIndex.Address = endAddress
reply.EndIndex.UTXO = endUTXOID.String()
reply.NumFetched = json.Uint64(len(utxos))
reply.Encoding = encoding.Encoding()
return nil
}
// GetAssetDescriptionArgs are arguments for passing into GetAssetDescription requests
type GetAssetDescriptionArgs struct {
AssetID string `json:"assetID"`
}
// GetAssetDescriptionReply defines the GetAssetDescription replies returned from the API
type GetAssetDescriptionReply struct {
FormattedAssetID
Name string `json:"name"`
Symbol string `json:"symbol"`
Denomination json.Uint8 `json:"denomination"`
}
// GetAssetDescription creates an empty account with the name passed in
func (service *Service) GetAssetDescription(_ *http.Request, args *GetAssetDescriptionArgs, reply *GetAssetDescriptionReply) error {
service.vm.ctx.Log.Info("AVM: GetAssetDescription called with %s", args.AssetID)
assetID, err := service.vm.lookupAssetID(args.AssetID)
if err != nil {
return err
}
tx := &UniqueTx{
vm: service.vm,
txID: assetID,
}
if status := tx.Status(); !status.Fetched() {
return errUnknownAssetID
}
createAssetTx, ok := tx.UnsignedTx.(*CreateAssetTx)
if !ok {
return errTxNotCreateAsset
}
reply.AssetID = assetID
reply.Name = createAssetTx.Name
reply.Symbol = createAssetTx.Symbol
reply.Denomination = json.Uint8(createAssetTx.Denomination)
return nil
}
// GetBalanceArgs are arguments for passing into GetBalance requests
type GetBalanceArgs struct {
Address string `json:"address"`
AssetID string `json:"assetID"`
}
// GetBalanceReply defines the GetBalance replies returned from the API
type GetBalanceReply struct {
Balance json.Uint64 `json:"balance"`
UTXOIDs []avax.UTXOID `json:"utxoIDs"`
}
// GetBalance returns the amount of an asset that an address at least partially owns
func (service *Service) GetBalance(r *http.Request, args *GetBalanceArgs, reply *GetBalanceReply) error {
service.vm.ctx.Log.Info("AVM: GetBalance called with address: %s assetID: %s", args.Address, args.AssetID)
addr, err := service.vm.ParseLocalAddress(args.Address)
if err != nil {
return fmt.Errorf("problem parsing address '%s': %w", args.Address, err)
}
assetID, err := service.vm.lookupAssetID(args.AssetID)
if err != nil {
return err
}
addrSet := ids.ShortSet{}
addrSet.Add(addr)
utxos, _, _, err := service.vm.GetUTXOs(addrSet, ids.ShortEmpty, ids.Empty, -1)
if err != nil {
return fmt.Errorf("problem retrieving UTXOs: %w", err)
}
reply.UTXOIDs = make([]avax.UTXOID, 0, len(utxos))
for _, utxo := range utxos {
if !utxo.AssetID().Equals(assetID) {
continue
}
transferable, ok := utxo.Out.(avax.TransferableOut)
if !ok {
continue
}
amt, err := safemath.Add64(transferable.Amount(), uint64(reply.Balance))
if err != nil {
return err
}
reply.Balance = json.Uint64(amt)
reply.UTXOIDs = append(reply.UTXOIDs, utxo.UTXOID)
}
return nil
}
// Balance ...
type Balance struct {
AssetID string `json:"asset"`
Balance json.Uint64 `json:"balance"`
}
// GetAllBalancesReply is the response from a call to GetAllBalances
type GetAllBalancesReply struct {
Balances []Balance `json:"balances"`
}
// GetAllBalances returns a map where:
// Key: ID of an asset such that [args.Address] has a non-zero balance of the asset
// Value: The balance of the asset held by the address
// Note that balances include assets that the address only _partially_ owns
// (ie is one of several addresses specified in a multi-sig)
func (service *Service) GetAllBalances(r *http.Request, args *api.JSONAddress, reply *GetAllBalancesReply) error {
service.vm.ctx.Log.Info("AVM: GetAllBalances called with address: %s", args.Address)
address, err := service.vm.ParseLocalAddress(args.Address)
if err != nil {
return fmt.Errorf("problem parsing address '%s': %w", args.Address, err)
}
addrSet := ids.ShortSet{}
addrSet.Add(address)
utxos, _, _, err := service.vm.GetUTXOs(addrSet, ids.ShortEmpty, ids.Empty, -1)
if err != nil {
return fmt.Errorf("couldn't get address's UTXOs: %w", err)
}
assetIDs := ids.Set{} // IDs of assets the address has a non-zero balance of
balances := make(map[[32]byte]uint64) // key: ID (as bytes). value: balance of that asset
for _, utxo := range utxos {
transferable, ok := utxo.Out.(avax.TransferableOut)
if !ok {
continue
}
assetID := utxo.AssetID()
assetIDs.Add(assetID)
balance := balances[assetID.Key()] // 0 if key doesn't exist
balance, err := safemath.Add64(transferable.Amount(), balance)
if err != nil {
balances[assetID.Key()] = math.MaxUint64
} else {
balances[assetID.Key()] = balance
}
}
reply.Balances = make([]Balance, assetIDs.Len())
i := 0
for assetIDKey := range assetIDs {
assetID := ids.NewID(assetIDKey)
if alias, err := service.vm.PrimaryAlias(assetID); err == nil {
reply.Balances[i] = Balance{
AssetID: alias,
Balance: json.Uint64(balances[assetIDKey]),
}
} else {
reply.Balances[i] = Balance{
AssetID: assetID.String(),
Balance: json.Uint64(balances[assetIDKey]),
}
}
i++
}
return nil
}
// CreateFixedCapAssetArgs are arguments for passing into CreateFixedCapAsset requests
type CreateFixedCapAssetArgs struct {
api.JSONSpendHeader // User, password, from addrs, change addr
Name string `json:"name"`
Symbol string `json:"symbol"`
Denomination byte `json:"denomination"`
InitialHolders []*Holder `json:"initialHolders"`
}
// Holder describes how much an address owns of an asset
type Holder struct {
Amount json.Uint64 `json:"amount"`
Address string `json:"address"`
}
// AssetIDChangeAddr is an asset ID and a change address
type AssetIDChangeAddr struct {
FormattedAssetID
api.JSONChangeAddr
}
// CreateFixedCapAsset returns ID of the newly created asset
func (service *Service) CreateFixedCapAsset(r *http.Request, args *CreateFixedCapAssetArgs, reply *AssetIDChangeAddr) error {
service.vm.ctx.Log.Info("AVM: CreateFixedCapAsset called with name: %s symbol: %s number of holders: %d",
args.Name,
args.Symbol,
len(args.InitialHolders),
)
if len(args.InitialHolders) == 0 {
return errNoHolders
}
// Parse the from addresses
fromAddrs := ids.ShortSet{}
for _, addrStr := range args.From {
addr, err := service.vm.ParseLocalAddress(addrStr)
if err != nil {
return fmt.Errorf("couldn't parse 'from' address %s: %w", addrStr, err)
}
fromAddrs.Add(addr)
}
// Get the UTXOs/keys for the from addresses
utxos, kc, err := service.vm.LoadUser(args.Username, args.Password, fromAddrs)
if err != nil {
return err
}
// Parse the change address.
if len(kc.Keys) == 0 {
return errNoKeys
}
changeAddr, err := service.vm.selectChangeAddr(kc.Keys[0].PublicKey().Address(), args.ChangeAddr)
if err != nil {
return err
}
avaxKey := service.vm.ctx.AVAXAssetID.Key()
amountsSpent, ins, keys, err := service.vm.Spend(
utxos,
kc,
map[[32]byte]uint64{
avaxKey: service.vm.creationTxFee,
},
)
if err != nil {
return err
}
outs := []*avax.TransferableOutput{}
if amountSpent := amountsSpent[avaxKey]; amountSpent > service.vm.creationTxFee {
outs = append(outs, &avax.TransferableOutput{
Asset: avax.Asset{ID: service.vm.ctx.AVAXAssetID},
Out: &secp256k1fx.TransferOutput{
Amt: amountSpent - service.vm.creationTxFee,
OutputOwners: secp256k1fx.OutputOwners{
Locktime: 0,
Threshold: 1,
Addrs: []ids.ShortID{changeAddr},
},
},
})
}
initialState := &InitialState{
FxID: 0, // TODO: Should lookup secp256k1fx FxID
Outs: make([]verify.State, 0, len(args.InitialHolders)),
}
for _, holder := range args.InitialHolders {
addr, err := service.vm.ParseLocalAddress(holder.Address)
if err != nil {
return err
}
initialState.Outs = append(initialState.Outs, &secp256k1fx.TransferOutput{
Amt: uint64(holder.Amount),
OutputOwners: secp256k1fx.OutputOwners{
Threshold: 1,
Addrs: []ids.ShortID{addr},
},
})
}
initialState.Sort(service.vm.codec)
tx := Tx{UnsignedTx: &CreateAssetTx{
BaseTx: BaseTx{BaseTx: avax.BaseTx{
NetworkID: service.vm.ctx.NetworkID,
BlockchainID: service.vm.ctx.ChainID,
Outs: outs,
Ins: ins,
}},
Name: args.Name,
Symbol: args.Symbol,
Denomination: args.Denomination,
States: []*InitialState{initialState},
}}
if err := tx.SignSECP256K1Fx(service.vm.codec, keys); err != nil {
return err
}
assetID, err := service.vm.IssueTx(tx.Bytes())
if err != nil {
return fmt.Errorf("problem issuing transaction: %w", err)
}
reply.AssetID = assetID
reply.ChangeAddr, err = service.vm.FormatLocalAddress(changeAddr)
return err
}
// CreateVariableCapAssetArgs are arguments for passing into CreateVariableCapAsset requests
type CreateVariableCapAssetArgs struct {
api.JSONSpendHeader // User, password, from addrs, change addr
Name string `json:"name"`
Symbol string `json:"symbol"`
Denomination byte `json:"denomination"`
MinterSets []Owners `json:"minterSets"`
}
// Owners describes who can perform an action
type Owners struct {
Threshold json.Uint32 `json:"threshold"`
Minters []string `json:"minters"`
}
// CreateVariableCapAsset returns ID of the newly created asset
func (service *Service) CreateVariableCapAsset(r *http.Request, args *CreateVariableCapAssetArgs, reply *AssetIDChangeAddr) error {
service.vm.ctx.Log.Info("AVM: CreateVariableCapAsset called with name: %s symbol: %s number of minters: %d",
args.Name,
args.Symbol,
len(args.MinterSets),
)
if len(args.MinterSets) == 0 {
return errNoMinters
}
// Parse the from addresses
fromAddrs := ids.ShortSet{}
for _, addrStr := range args.From {
addr, err := service.vm.ParseLocalAddress(addrStr)
if err != nil {
return fmt.Errorf("couldn't parse 'from' address %s: %w", addrStr, err)
}
fromAddrs.Add(addr)
}
// Get the UTXOs/keys for the from addresses
utxos, kc, err := service.vm.LoadUser(args.Username, args.Password, fromAddrs)
if err != nil {
return err
}
// Parse the change address.
if len(kc.Keys) == 0 {
return errNoKeys
}
changeAddr, err := service.vm.selectChangeAddr(kc.Keys[0].PublicKey().Address(), args.ChangeAddr)
if err != nil {
return err
}
avaxKey := service.vm.ctx.AVAXAssetID.Key()
amountsSpent, ins, keys, err := service.vm.Spend(
utxos,
kc,
map[[32]byte]uint64{
avaxKey: service.vm.creationTxFee,
},
)
if err != nil {
return err
}
outs := []*avax.TransferableOutput{}
if amountSpent := amountsSpent[avaxKey]; amountSpent > service.vm.creationTxFee {
outs = append(outs, &avax.TransferableOutput{
Asset: avax.Asset{ID: service.vm.ctx.AVAXAssetID},
Out: &secp256k1fx.TransferOutput{
Amt: amountSpent - service.vm.creationTxFee,
OutputOwners: secp256k1fx.OutputOwners{
Locktime: 0,
Threshold: 1,
Addrs: []ids.ShortID{changeAddr},
},
},
})
}
initialState := &InitialState{
FxID: 0, // TODO: Should lookup secp256k1fx FxID
Outs: make([]verify.State, 0, len(args.MinterSets)),
}
for _, owner := range args.MinterSets {
minter := &secp256k1fx.MintOutput{
OutputOwners: secp256k1fx.OutputOwners{
Threshold: uint32(owner.Threshold),
Addrs: make([]ids.ShortID, 0, len(owner.Minters)),
},
}
for _, address := range owner.Minters {
addr, err := service.vm.ParseLocalAddress(address)
if err != nil {
return err
}
minter.Addrs = append(minter.Addrs, addr)
}
ids.SortShortIDs(minter.Addrs)
initialState.Outs = append(initialState.Outs, minter)
}
initialState.Sort(service.vm.codec)
tx := Tx{UnsignedTx: &CreateAssetTx{
BaseTx: BaseTx{BaseTx: avax.BaseTx{
NetworkID: service.vm.ctx.NetworkID,
BlockchainID: service.vm.ctx.ChainID,
Outs: outs,
Ins: ins,
}},
Name: args.Name,
Symbol: args.Symbol,
Denomination: args.Denomination,
States: []*InitialState{initialState},
}}
if err := tx.SignSECP256K1Fx(service.vm.codec, keys); err != nil {
return err
}
assetID, err := service.vm.IssueTx(tx.Bytes())
if err != nil {
return fmt.Errorf("problem issuing transaction: %w", err)
}
reply.AssetID = assetID
reply.ChangeAddr, err = service.vm.FormatLocalAddress(changeAddr)
return err
}
// CreateNFTAssetArgs are arguments for passing into CreateNFTAsset requests
type CreateNFTAssetArgs struct {
api.JSONSpendHeader // User, password, from addrs, change addr
Name string `json:"name"`
Symbol string `json:"symbol"`
MinterSets []Owners `json:"minterSets"`
}
// CreateNFTAsset returns ID of the newly created asset
func (service *Service) CreateNFTAsset(r *http.Request, args *CreateNFTAssetArgs, reply *AssetIDChangeAddr) error {
service.vm.ctx.Log.Info("AVM: CreateNFTAsset called with name: %s symbol: %s number of minters: %d",
args.Name,
args.Symbol,
len(args.MinterSets),
)
if len(args.MinterSets) == 0 {
return errNoMinters
}
// Parse the from addresses
fromAddrs := ids.ShortSet{}
for _, addrStr := range args.From {
addr, err := service.vm.ParseLocalAddress(addrStr)
if err != nil {
return fmt.Errorf("couldn't parse 'from' address %s: %w", addrStr, err)
}
fromAddrs.Add(addr)
}
// Get the UTXOs/keys for the from addresses
utxos, kc, err := service.vm.LoadUser(args.Username, args.Password, fromAddrs)
if err != nil {
return err
}
// Parse the change address.
if len(kc.Keys) == 0 {
return errNoKeys
}
changeAddr, err := service.vm.selectChangeAddr(kc.Keys[0].PublicKey().Address(), args.ChangeAddr)
if err != nil {
return err
}
avaxKey := service.vm.ctx.AVAXAssetID.Key()
amountsSpent, ins, keys, err := service.vm.Spend(
utxos,
kc,
map[[32]byte]uint64{
avaxKey: service.vm.creationTxFee,
},
)
if err != nil {
return err
}
outs := []*avax.TransferableOutput{}
if amountSpent := amountsSpent[avaxKey]; amountSpent > service.vm.creationTxFee {
outs = append(outs, &avax.TransferableOutput{
Asset: avax.Asset{ID: service.vm.ctx.AVAXAssetID},
Out: &secp256k1fx.TransferOutput{
Amt: amountSpent - service.vm.creationTxFee,
OutputOwners: secp256k1fx.OutputOwners{
Locktime: 0,
Threshold: 1,
Addrs: []ids.ShortID{changeAddr},
},
},
})
}
initialState := &InitialState{
FxID: 1, // TODO: Should lookup nftfx FxID
Outs: make([]verify.State, 0, len(args.MinterSets)),
}
for i, owner := range args.MinterSets {
minter := &nftfx.MintOutput{
GroupID: uint32(i),
OutputOwners: secp256k1fx.OutputOwners{
Threshold: uint32(owner.Threshold),
},
}
for _, address := range owner.Minters {
addr, err := service.vm.ParseLocalAddress(address)
if err != nil {
return err
}
minter.Addrs = append(minter.Addrs, addr)
}
ids.SortShortIDs(minter.Addrs)
initialState.Outs = append(initialState.Outs, minter)
}
initialState.Sort(service.vm.codec)
tx := Tx{UnsignedTx: &CreateAssetTx{
BaseTx: BaseTx{BaseTx: avax.BaseTx{
NetworkID: service.vm.ctx.NetworkID,
BlockchainID: service.vm.ctx.ChainID,
Outs: outs,
Ins: ins,
}},
Name: args.Name,
Symbol: args.Symbol,
Denomination: 0, // NFTs are non-fungible
States: []*InitialState{initialState},
}}
if err := tx.SignSECP256K1Fx(service.vm.codec, keys); err != nil {
return err
}
assetID, err := service.vm.IssueTx(tx.Bytes())
if err != nil {
return fmt.Errorf("problem issuing transaction: %w", err)
}
reply.AssetID = assetID
reply.ChangeAddr, err = service.vm.FormatLocalAddress(changeAddr)
return err
}
// CreateAddress creates an address for the user [args.Username]
func (service *Service) CreateAddress(r *http.Request, args *api.UserPass, reply *api.JSONAddress) error {
service.vm.ctx.Log.Info("AVM: CreateAddress called for user '%s'", args.Username)
db, err := service.vm.ctx.Keystore.GetDatabase(args.Username, args.Password)
if err != nil {
return fmt.Errorf("problem retrieving user %q: %w", args.Username, err)
}
// Drop any potential error closing the database to report the original
// error
defer db.Close()
user := userState{vm: service.vm}
addresses, _ := user.Addresses(db)
if len(addresses) >= maxKeystoreAddresses {
return fmt.Errorf("keystore user has reached its limit of %d addresses", maxKeystoreAddresses)
}
factory := crypto.FactorySECP256K1R{}
skIntf, err := factory.NewPrivateKey()
if err != nil {
return fmt.Errorf("problem generating private key: %w", err)
}
sk := skIntf.(*crypto.PrivateKeySECP256K1R)
if err := user.SetKey(db, sk); err != nil {
return fmt.Errorf("problem saving private key: %w", err)
}
addresses = append(addresses, sk.PublicKey().Address())
if err := user.SetAddresses(db, addresses); err != nil {
return fmt.Errorf("problem saving address: %w", err)
}
reply.Address, err = service.vm.FormatLocalAddress(sk.PublicKey().Address())
if err != nil {
return fmt.Errorf("problem formatting address: %w", err)
}
// Return an error if the DB can't close, this will execute before the above
// db close.
return db.Close()
}
// ListAddresses returns all of the addresses controlled by user [args.Username]
func (service *Service) ListAddresses(_ *http.Request, args *api.UserPass, response *api.JSONAddresses) error {
service.vm.ctx.Log.Info("AVM: ListAddresses called for user '%s'", args.Username)
db, err := service.vm.ctx.Keystore.GetDatabase(args.Username, args.Password)
if err != nil {
return fmt.Errorf("problem retrieving user '%s': %w", args.Username, err)
}
response.Addresses = []string{}
user := userState{vm: service.vm}
addresses, err := user.Addresses(db)
if err != nil {
return db.Close()
}
for _, address := range addresses {
addr, err := service.vm.FormatLocalAddress(address)
if err != nil {
// Drop any potential error closing the database to report the
// original error
_ = db.Close()
return fmt.Errorf("problem formatting address: %w", err)
}
response.Addresses = append(response.Addresses, addr)
}
return db.Close()
}
// ExportKeyArgs are arguments for ExportKey
type ExportKeyArgs struct {
api.UserPass
Address string `json:"address"`
}
// ExportKeyReply is the response for ExportKey
type ExportKeyReply struct {
// The decrypted PrivateKey for the Address provided in the arguments
PrivateKey string `json:"privateKey"`
}
// ExportKey returns a private key from the provided user
func (service *Service) ExportKey(r *http.Request, args *ExportKeyArgs, reply *ExportKeyReply) error {
service.vm.ctx.Log.Info("AVM: ExportKey called for user %q", args.Username)
addr, err := service.vm.ParseLocalAddress(args.Address)
if err != nil {
return fmt.Errorf("problem parsing address %q: %w", args.Address, err)
}
db, err := service.vm.ctx.Keystore.GetDatabase(args.Username, args.Password)
if err != nil {
return fmt.Errorf("problem retrieving user %q: %w", args.Username, err)
}
user := userState{vm: service.vm}
sk, err := user.Key(db, addr)
if err != nil {
// Drop any potential error closing the database to report the original
// error
_ = db.Close()
return fmt.Errorf("problem retrieving private key: %w", err)
}
reply.PrivateKey = constants.SecretKeyPrefix + formatting.CB58{Bytes: sk.Bytes()}.String()
return db.Close()
}
// ImportKeyArgs are arguments for ImportKey
type ImportKeyArgs struct {
api.UserPass
PrivateKey string `json:"privateKey"`
}
// ImportKeyReply is the response for ImportKey
type ImportKeyReply struct {
// The address controlled by the PrivateKey provided in the arguments
Address string `json:"address"`
}
// ImportKey adds a private key to the provided user
func (service *Service) ImportKey(r *http.Request, args *ImportKeyArgs, reply *api.JSONAddress) error {
service.vm.ctx.Log.Info("AVM: ImportKey called for user '%s'", args.Username)
db, err := service.vm.ctx.Keystore.GetDatabase(args.Username, args.Password)
if err != nil {
return fmt.Errorf("problem retrieving data: %w", err)
}
// Drop any potential error closing the database to report the original
// error
defer db.Close()
user := userState{vm: service.vm}
addresses, _ := user.Addresses(db)
if len(addresses) >= maxKeystoreAddresses {
return fmt.Errorf("keystore user has reached its limit of %d addresses", maxKeystoreAddresses)
}
if !strings.HasPrefix(args.PrivateKey, constants.SecretKeyPrefix) {
return fmt.Errorf("private key missing %s prefix", constants.SecretKeyPrefix)
}
trimmedPrivateKey := strings.TrimPrefix(args.PrivateKey, constants.SecretKeyPrefix)
formattedPrivateKey := formatting.CB58{}
if err := formattedPrivateKey.FromString(trimmedPrivateKey); err != nil {
return fmt.Errorf("problem parsing private key: %w", err)
}
factory := crypto.FactorySECP256K1R{}
skIntf, err := factory.ToPrivateKey(formattedPrivateKey.Bytes)
if err != nil {
return fmt.Errorf("problem parsing private key: %w", err)
}
sk := skIntf.(*crypto.PrivateKeySECP256K1R)
if err := user.SetKey(db, sk); err != nil {
return fmt.Errorf("problem saving key %w", err)
}
newAddress := sk.PublicKey().Address()
reply.Address, err = service.vm.FormatLocalAddress(newAddress)
if err != nil {
return fmt.Errorf("problem formatting address: %w", err)
}
for _, address := range addresses {
if newAddress.Equals(address) {
return db.Close()
}
}
addresses = append(addresses, newAddress)
if err := user.SetAddresses(db, addresses); err != nil {
return fmt.Errorf("problem saving addresses: %w", err)
}
return db.Close()
}
// SendOutput specifies that [Amount] of asset [AssetID] be sent to [To]
type SendOutput struct {