[#51] balance: Support notary contract
Signed-off-by: Alex Vanin <alexey@nspcc.ru>enable-notary-in-public-chains
Alex Vanin
Alex Vanin
parent
299c888266
commit
c6816193d3
|
|
@ -113,181 +113,115 @@ func Transfer(from, to interop.Hash160, amount int, data interface{}) bool {
|
|||
}
|
||||
|
||||
func TransferX(from, to interop.Hash160, amount int, details []byte) bool {
|
||||
var (
|
||||
n int // number of votes for inner ring invoke
|
||||
hashTxID []byte // ballot key of the inner ring invocation
|
||||
)
|
||||
|
||||
innerRing := irList()
|
||||
threshold := len(innerRing)/3*2 + 1
|
||||
|
||||
irKey := common.InnerRingInvoker(innerRing)
|
||||
if len(irKey) == 0 {
|
||||
multiaddr := common.InnerRingMultiAddressViaStorage(ctx, netmapContractKey)
|
||||
if !runtime.CheckWitness(multiaddr) {
|
||||
panic("transferX: this method must be invoked from inner ring")
|
||||
}
|
||||
|
||||
fromKnownContract := fromKnownContract(runtime.GetCallingScriptHash())
|
||||
if fromKnownContract {
|
||||
n = threshold
|
||||
runtime.Log("transferX: processed indirect invoke")
|
||||
result := token.transfer(ctx, from, to, amount, true, details)
|
||||
if result {
|
||||
runtime.Log("transferX: success")
|
||||
} else {
|
||||
hashTxID = common.InvokeID([]interface{}{from, to, amount}, []byte("transfer"))
|
||||
n = common.Vote(ctx, hashTxID, irKey)
|
||||
// consider panic there
|
||||
runtime.Log("transferX: fail")
|
||||
}
|
||||
|
||||
if n >= threshold {
|
||||
common.RemoveVotes(ctx, hashTxID)
|
||||
|
||||
result := token.transfer(ctx, from, to, amount, true, details)
|
||||
if result {
|
||||
runtime.Log("transferX: success")
|
||||
} else {
|
||||
// consider panic there
|
||||
runtime.Log("transferX: fail")
|
||||
}
|
||||
|
||||
return result
|
||||
}
|
||||
|
||||
return false
|
||||
return result
|
||||
}
|
||||
|
||||
func Lock(txID []byte, from, to interop.Hash160, amount, until int) bool {
|
||||
innerRing := irList()
|
||||
threshold := len(innerRing)/3*2 + 1
|
||||
|
||||
irKey := common.InnerRingInvoker(innerRing)
|
||||
if len(irKey) == 0 {
|
||||
multiaddr := common.InnerRingMultiAddressViaStorage(ctx, netmapContractKey)
|
||||
if !runtime.CheckWitness(multiaddr) {
|
||||
panic("lock: this method must be invoked from inner ring")
|
||||
}
|
||||
|
||||
hashTxID := common.InvokeID([]interface{}{txID, from, to, amount, until}, []byte("lock"))
|
||||
lockAccount := Account{
|
||||
Balance: 0,
|
||||
Until: until,
|
||||
Parent: from,
|
||||
}
|
||||
common.SetSerialized(ctx, to, lockAccount)
|
||||
|
||||
n := common.Vote(ctx, hashTxID, irKey)
|
||||
if n >= threshold {
|
||||
common.RemoveVotes(ctx, hashTxID)
|
||||
|
||||
lockAccount := Account{
|
||||
Balance: 0,
|
||||
Until: until,
|
||||
Parent: from,
|
||||
}
|
||||
common.SetSerialized(ctx, to, lockAccount)
|
||||
|
||||
result := token.transfer(ctx, from, to, amount, true, lockTransferMsg)
|
||||
if !result {
|
||||
// consider using `return false` to remove votes
|
||||
panic("lock: can't lock funds")
|
||||
}
|
||||
|
||||
runtime.Log("lock: created lock account")
|
||||
runtime.Notify("Lock", txID, from, to, amount, until)
|
||||
result := token.transfer(ctx, from, to, amount, true, lockTransferMsg)
|
||||
if !result {
|
||||
// consider using `return false` to remove votes
|
||||
panic("lock: can't lock funds")
|
||||
}
|
||||
|
||||
runtime.Log("lock: processed invoke from inner ring")
|
||||
runtime.Log("lock: created lock account")
|
||||
runtime.Notify("Lock", txID, from, to, amount, until)
|
||||
|
||||
return true
|
||||
}
|
||||
|
||||
func NewEpoch(epochNum int) bool {
|
||||
innerRing := irList()
|
||||
threshold := len(innerRing)/3*2 + 1
|
||||
|
||||
irKey := common.InnerRingInvoker(innerRing)
|
||||
if len(irKey) == 0 {
|
||||
multiaddr := common.InnerRingMultiAddressViaStorage(ctx, netmapContractKey)
|
||||
if !runtime.CheckWitness(multiaddr) {
|
||||
panic("epochNum: this method must be invoked from inner ring")
|
||||
}
|
||||
|
||||
epochID := common.InvokeID([]interface{}{epochNum}, []byte("epoch"))
|
||||
it := storage.Find(ctx, []byte{}, storage.KeysOnly)
|
||||
for iterator.Next(it) {
|
||||
addr := iterator.Value(it).([]byte) // it MUST BE `storage.KeysOnly`
|
||||
if len(addr) != 20 {
|
||||
continue
|
||||
}
|
||||
|
||||
n := common.Vote(ctx, epochID, irKey)
|
||||
if n >= threshold {
|
||||
common.RemoveVotes(ctx, epochID)
|
||||
it := storage.Find(ctx, []byte{}, storage.KeysOnly)
|
||||
for iterator.Next(it) {
|
||||
addr := iterator.Value(it).([]byte) // it MUST BE `storage.KeysOnly`
|
||||
if len(addr) != 20 {
|
||||
continue
|
||||
}
|
||||
acc := getAccount(ctx, addr)
|
||||
if acc.Until == 0 {
|
||||
continue
|
||||
}
|
||||
|
||||
acc := getAccount(ctx, addr)
|
||||
if acc.Until == 0 {
|
||||
continue
|
||||
}
|
||||
|
||||
if epochNum >= acc.Until {
|
||||
// return assets back to the parent
|
||||
token.transfer(ctx, addr, acc.Parent, acc.Balance, true, unlockTransferMsg)
|
||||
}
|
||||
if epochNum >= acc.Until {
|
||||
// return assets back to the parent
|
||||
token.transfer(ctx, addr, acc.Parent, acc.Balance, true, unlockTransferMsg)
|
||||
}
|
||||
}
|
||||
|
||||
runtime.Log("newEpoch: processed invoke from inner ring")
|
||||
|
||||
return true
|
||||
}
|
||||
|
||||
func Mint(to interop.Hash160, amount int, details []byte) bool {
|
||||
innerRing := irList()
|
||||
threshold := len(innerRing)/3*2 + 1
|
||||
|
||||
irKey := common.InnerRingInvoker(innerRing)
|
||||
if len(irKey) == 0 {
|
||||
panic("burn: this method must be invoked from inner ring")
|
||||
multiaddr := common.InnerRingMultiAddressViaStorage(ctx, netmapContractKey)
|
||||
if !runtime.CheckWitness(multiaddr) {
|
||||
panic("mint: this method must be invoked from inner ring")
|
||||
}
|
||||
|
||||
mintID := common.InvokeID([]interface{}{to, amount, details}, []byte("mint"))
|
||||
|
||||
n := common.Vote(ctx, mintID, irKey)
|
||||
if n >= threshold {
|
||||
common.RemoveVotes(ctx, mintID)
|
||||
|
||||
ok := token.transfer(ctx, nil, to, amount, true, details)
|
||||
if !ok {
|
||||
panic("mint: can't transfer assets")
|
||||
}
|
||||
|
||||
supply := token.getSupply(ctx)
|
||||
supply = supply + amount
|
||||
storage.Put(ctx, token.CirculationKey, supply)
|
||||
runtime.Log("mint: assets were minted")
|
||||
runtime.Notify("Mint", to, amount)
|
||||
ok := token.transfer(ctx, nil, to, amount, true, details)
|
||||
if !ok {
|
||||
panic("mint: can't transfer assets")
|
||||
}
|
||||
|
||||
supply := token.getSupply(ctx)
|
||||
supply = supply + amount
|
||||
storage.Put(ctx, token.CirculationKey, supply)
|
||||
runtime.Log("mint: assets were minted")
|
||||
runtime.Notify("Mint", to, amount)
|
||||
|
||||
return true
|
||||
}
|
||||
|
||||
func Burn(from interop.Hash160, amount int, details []byte) bool {
|
||||
innerRing := irList()
|
||||
threshold := len(innerRing)/3*2 + 1
|
||||
|
||||
irKey := common.InnerRingInvoker(innerRing)
|
||||
if len(irKey) == 0 {
|
||||
multiaddr := common.InnerRingMultiAddressViaStorage(ctx, netmapContractKey)
|
||||
if !runtime.CheckWitness(multiaddr) {
|
||||
panic("burn: this method must be invoked from inner ring")
|
||||
}
|
||||
|
||||
burnID := common.InvokeID([]interface{}{from, amount, details}, []byte("burn"))
|
||||
|
||||
n := common.Vote(ctx, burnID, irKey)
|
||||
if n >= threshold {
|
||||
common.RemoveVotes(ctx, burnID)
|
||||
|
||||
ok := token.transfer(ctx, from, nil, amount, true, details)
|
||||
if !ok {
|
||||
panic("burn: can't transfer assets")
|
||||
}
|
||||
|
||||
supply := token.getSupply(ctx)
|
||||
if supply < amount {
|
||||
panic("panic, negative supply after burn")
|
||||
}
|
||||
|
||||
supply = supply - amount
|
||||
storage.Put(ctx, token.CirculationKey, supply)
|
||||
runtime.Log("burn: assets were burned")
|
||||
runtime.Notify("Burn", from, amount)
|
||||
ok := token.transfer(ctx, from, nil, amount, true, details)
|
||||
if !ok {
|
||||
panic("burn: can't transfer assets")
|
||||
}
|
||||
|
||||
supply := token.getSupply(ctx)
|
||||
if supply < amount {
|
||||
panic("panic, negative supply after burn")
|
||||
}
|
||||
|
||||
supply = supply - amount
|
||||
storage.Put(ctx, token.CirculationKey, supply)
|
||||
runtime.Log("burn: assets were burned")
|
||||
runtime.Notify("Burn", from, amount)
|
||||
|
||||
return true
|
||||
}
|
||||
|
||||
|
|
@ -389,33 +323,3 @@ func getAccount(ctx storage.Context, key interface{}) Account {
|
|||
|
||||
return Account{}
|
||||
}
|
||||
|
||||
/*
|
||||
Check if invocation made from known container or audit contracts.
|
||||
This is necessary because calls from these contracts require to do transfer
|
||||
without signature collection (1 invoke transfer).
|
||||
|
||||
IR1, IR2, IR3, IR4 -(4 invokes)-> [ Container Contract ] -(1 invoke)-> [ Balance Contract ]
|
||||
|
||||
We can do 1 invoke transfer if:
|
||||
- invoke happened from inner ring node,
|
||||
- it is indirect invocation from other smart-contract.
|
||||
|
||||
However there is a possible attack, when malicious inner ring node creates
|
||||
malicious smart-contract in morph chain to do inderect call.
|
||||
|
||||
MaliciousIR -(1 invoke)-> [ Malicious Contract ] -(1 invoke) -> [ Balance Contract ]
|
||||
|
||||
To prevent that, we have to allow 1 invoke transfer from authorised well known
|
||||
smart-contracts, that will be set up at `Init` method.
|
||||
*/
|
||||
|
||||
func fromKnownContract(caller interop.Hash160) bool {
|
||||
containerContractAddr := storage.Get(ctx, containerContractKey).([]byte)
|
||||
|
||||
return common.BytesEqual(caller, containerContractAddr)
|
||||
}
|
||||
|
||||
func irList() []common.IRNode {
|
||||
return common.InnerRingListViaStorage(ctx, netmapContractKey)
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue