frostfs-contract/frostfs/frostfs_contract.go

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package frostfs
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import (
"git.frostfs.info/TrueCloudLab/frostfs-contract/common"
"github.com/nspcc-dev/neo-go/pkg/interop"
"github.com/nspcc-dev/neo-go/pkg/interop/contract"
"github.com/nspcc-dev/neo-go/pkg/interop/iterator"
"github.com/nspcc-dev/neo-go/pkg/interop/native/gas"
"github.com/nspcc-dev/neo-go/pkg/interop/native/ledger"
"github.com/nspcc-dev/neo-go/pkg/interop/native/management"
"github.com/nspcc-dev/neo-go/pkg/interop/native/roles"
"github.com/nspcc-dev/neo-go/pkg/interop/native/std"
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"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
"github.com/nspcc-dev/neo-go/pkg/interop/storage"
)
type (
record struct {
key []byte
val []byte
}
)
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const (
// CandidateFeeConfigKey contains fee for a candidate registration.
CandidateFeeConfigKey = "InnerRingCandidateFee"
withdrawFeeConfigKey = "WithdrawFee"
alphabetKey = "alphabet"
candidatesKey = "candidates"
processingContractKey = "processingScriptHash"
maxBalanceAmount = 9000 // Max integer of Fixed12 in JSON bound (2**53-1)
maxBalanceAmountGAS = int64(maxBalanceAmount) * 1_0000_0000
// hardcoded value to ignore deposit notification in onReceive
ignoreDepositNotification = "\x57\x0b"
)
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var configPrefix = []byte("config")
// _deploy sets up initial alphabet node keys.
func _deploy(data interface{}, isUpdate bool) {
ctx := storage.GetContext()
if isUpdate {
args := data.([]interface{})
common.CheckVersion(args[len(args)-1].(int))
return
}
args := data.(struct {
addrProc interop.Hash160
keys []interop.PublicKey
config [][]byte
})
if len(args.keys) == 0 {
panic("at least one alphabet key must be provided")
}
if len(args.addrProc) != interop.Hash160Len {
panic("incorrect length of contract script hash")
}
for i := 0; i < len(args.keys); i++ {
pub := args.keys[i]
if len(pub) != interop.PublicKeyCompressedLen {
panic("incorrect public key length")
}
}
// initialize all storage slices
common.SetSerialized(ctx, alphabetKey, args.keys)
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storage.Put(ctx, processingContractKey, args.addrProc)
ln := len(args.config)
if ln%2 != 0 {
panic("bad configuration")
}
for i := 0; i < ln/2; i++ {
key := args.config[i*2]
val := args.config[i*2+1]
setConfig(ctx, key, val)
}
runtime.Log("frostfs: contract initialized")
}
// Update method updates contract source code and manifest. It can be invoked
// only by sidechain committee.
func Update(script []byte, manifest []byte, data interface{}) {
blockHeight := ledger.CurrentIndex()
alphabetKeys := roles.GetDesignatedByRole(roles.NeoFSAlphabet, uint32(blockHeight+1))
alphabetCommittee := common.Multiaddress(alphabetKeys, true)
if !runtime.CheckWitness(alphabetCommittee) {
panic(common.ErrAlphabetWitnessFailed)
}
management.UpdateWithData(script, manifest, common.AppendVersion(data))
runtime.Log("frostfs contract updated")
}
// AlphabetAddress returns 2\3n+1 multisignature address of alphabet nodes.
// It is used in sidechain notary disabled environment.
func AlphabetAddress() interop.Hash160 {
ctx := storage.GetReadOnlyContext()
return multiaddress(getAlphabetNodes(ctx))
}
// InnerRingCandidates returns an array of structures that contain an Inner Ring
// candidate node key.
func InnerRingCandidates() []common.IRNode {
ctx := storage.GetReadOnlyContext()
nodes := []common.IRNode{}
it := storage.Find(ctx, candidatesKey, storage.KeysOnly|storage.RemovePrefix)
for iterator.Next(it) {
pub := iterator.Value(it).([]byte)
nodes = append(nodes, common.IRNode{PublicKey: pub})
}
return nodes
}
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// InnerRingCandidateRemove removes a key from a list of Inner Ring candidates.
// It can be invoked by Alphabet nodes or the candidate itself.
//
// This method does not return fee back to the candidate.
func InnerRingCandidateRemove(key interop.PublicKey) {
ctx := storage.GetContext()
keyOwner := runtime.CheckWitness(key)
if !keyOwner {
multiaddr := AlphabetAddress()
if !runtime.CheckWitness(multiaddr) {
panic("this method must be invoked by candidate or alphabet")
}
}
prefix := []byte(candidatesKey)
stKey := append(prefix, key...)
if storage.Get(ctx, stKey) != nil {
storage.Delete(ctx, stKey)
runtime.Log("candidate has been removed")
}
}
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// InnerRingCandidateAdd adds a key to a list of Inner Ring candidates.
// It can be invoked only by the candidate itself.
//
// This method transfers fee from a candidate to the contract account.
// Fee value is specified in FrostFS network config with the key InnerRingCandidateFee.
func InnerRingCandidateAdd(key interop.PublicKey) {
ctx := storage.GetContext()
common.CheckWitness(key)
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stKey := append([]byte(candidatesKey), key...)
if storage.Get(ctx, stKey) != nil {
panic("candidate already in the list")
}
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from := contract.CreateStandardAccount(key)
to := runtime.GetExecutingScriptHash()
fee := getConfig(ctx, CandidateFeeConfigKey).(int)
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transferred := gas.Transfer(from, to, fee, []byte(ignoreDepositNotification))
if !transferred {
panic("failed to transfer funds, aborting")
}
storage.Put(ctx, stKey, []byte{1})
runtime.Log("candidate has been added")
}
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// OnNEP17Payment is a callback for NEP-17 compatible native GAS contract.
// It takes no more than 9000.0 GAS. Native GAS has precision 8, and
// FrostFS balance contract has precision 12. Values bigger than 9000.0 can
// break JSON limits for integers when precision is converted.
func OnNEP17Payment(from interop.Hash160, amount int, data interface{}) {
rcv := data.(interop.Hash160)
if common.BytesEqual(rcv, []byte(ignoreDepositNotification)) {
return
}
if amount <= 0 {
common.AbortWithMessage("amount must be positive")
} else if maxBalanceAmountGAS < int64(amount) {
common.AbortWithMessage("out of max amount limit")
}
caller := runtime.GetCallingScriptHash()
if !common.BytesEqual(caller, interop.Hash160(gas.Hash)) {
common.AbortWithMessage("only GAS can be accepted for deposit")
}
switch len(rcv) {
case 20:
case 0:
rcv = from
default:
common.AbortWithMessage("invalid data argument, expected Hash160")
}
runtime.Log("funds have been transferred")
tx := runtime.GetScriptContainer()
runtime.Notify("Deposit", from, amount, rcv, tx.Hash)
}
// Withdraw initializes gas asset withdraw from FrostFS. It can be invoked only
// by the specified user.
//
// This method produces Withdraw notification to lock assets in the sidechain and
// transfers withdraw fee from a user account to each Alphabet node. If notary
// is enabled in the mainchain, fee is transferred to Processing contract.
// Fee value is specified in FrostFS network config with the key WithdrawFee.
func Withdraw(user interop.Hash160, amount int) {
if !runtime.CheckWitness(user) {
panic("you should be the owner of the wallet")
}
if amount < 0 {
panic("non positive amount number")
}
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if amount > maxBalanceAmount {
panic("out of max amount limit")
}
ctx := storage.GetContext()
// transfer fee to proxy contract to pay cheque invocation
fee := getConfig(ctx, withdrawFeeConfigKey).(int)
processingAddr := storage.Get(ctx, processingContractKey).(interop.Hash160)
transferred := gas.Transfer(user, processingAddr, fee, []byte{})
if !transferred {
panic("failed to transfer withdraw fee, aborting")
}
// notify alphabet nodes
amount = amount * 100000000
tx := runtime.GetScriptContainer()
runtime.Notify("Withdraw", user, amount, tx.Hash)
}
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// Cheque transfers GAS back to the user from the contract account, if assets were
// successfully locked in FrostFS balance contract. It can be invoked only by
// Alphabet nodes.
//
// This method produces Cheque notification to burn assets in sidechain.
func Cheque(id []byte, user interop.Hash160, amount int, lockAcc []byte) {
common.CheckAlphabetWitness()
from := runtime.GetExecutingScriptHash()
transferred := gas.Transfer(from, user, amount, nil)
if !transferred {
panic("failed to transfer funds, aborting")
}
runtime.Log("funds have been transferred")
runtime.Notify("Cheque", id, user, amount, lockAcc)
}
// Bind method produces notification to bind the specified public keys in FrostFSID
// contract in the sidechain. It can be invoked only by specified user.
//
// This method produces Bind notification. This method panics if keys are not
// 33 byte long. User argument must be a valid 20 byte script hash.
func Bind(user []byte, keys []interop.PublicKey) {
if !runtime.CheckWitness(user) {
panic("you should be the owner of the wallet")
}
for i := 0; i < len(keys); i++ {
pubKey := keys[i]
if len(pubKey) != interop.PublicKeyCompressedLen {
panic("incorrect public key size")
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}
}
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runtime.Notify("Bind", user, keys)
}
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// Unbind method produces notification to unbind the specified public keys in FrostFSID
// contract in the sidechain. It can be invoked only by the specified user.
//
// This method produces Unbind notification. This method panics if keys are not
// 33 byte long. User argument must be a valid 20 byte script hash.
func Unbind(user []byte, keys []interop.PublicKey) {
if !runtime.CheckWitness(user) {
panic("you should be the owner of the wallet")
}
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for i := 0; i < len(keys); i++ {
pubKey := keys[i]
if len(pubKey) != interop.PublicKeyCompressedLen {
panic("incorrect public key size")
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}
}
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runtime.Notify("Unbind", user, keys)
}
// Config returns configuration value of FrostFS configuration. If the key does
// not exists, returns nil.
func Config(key []byte) interface{} {
ctx := storage.GetReadOnlyContext()
return getConfig(ctx, key)
}
// SetConfig key-value pair as a FrostFS runtime configuration value. It can be invoked
// only by Alphabet nodes.
func SetConfig(id, key, val []byte) {
ctx := storage.GetContext()
common.CheckAlphabetWitness()
setConfig(ctx, key, val)
runtime.Notify("SetConfig", id, key, val)
runtime.Log("configuration has been updated")
}
// ListConfig returns an array of structures that contain a key and a value of all
// FrostFS configuration records. Key and value are both byte arrays.
func ListConfig() []record {
ctx := storage.GetReadOnlyContext()
var config []record
it := storage.Find(ctx, configPrefix, storage.None)
for iterator.Next(it) {
pair := iterator.Value(it).(struct {
key []byte
val []byte
})
r := record{key: pair.key[len(configPrefix):], val: pair.val}
config = append(config, r)
}
return config
}
// Version returns version of the contract.
func Version() int {
return common.Version
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}
// getAlphabetNodes returns a deserialized slice of nodes from storage.
func getAlphabetNodes(ctx storage.Context) []interop.PublicKey {
data := storage.Get(ctx, alphabetKey)
if data != nil {
return std.Deserialize(data.([]byte)).([]interop.PublicKey)
}
return []interop.PublicKey{}
}
// getConfig returns the installed frostfs configuration value or nil if it is not set.
func getConfig(ctx storage.Context, key interface{}) interface{} {
postfix := key.([]byte)
storageKey := append(configPrefix, postfix...)
return storage.Get(ctx, storageKey)
}
// setConfig sets a frostfs configuration value in the contract storage.
func setConfig(ctx storage.Context, key, val interface{}) {
postfix := key.([]byte)
storageKey := append(configPrefix, postfix...)
storage.Put(ctx, storageKey, val)
}
// multiaddress returns a multisignature address from the list of IRNode structures
// with m = 2/3n+1.
func multiaddress(keys []interop.PublicKey) []byte {
threshold := len(keys)*2/3 + 1
return contract.CreateMultisigAccount(threshold, keys)
}