frostfs-node/pkg/innerring/invoke/neofs.go

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package invoke
import (
"bytes"
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"crypto/ecdsa"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neofs-crypto"
"github.com/nspcc-dev/neofs-node/pkg/morph/client"
)
type (
// ChequeParams for CashOutCheque invocation.
ChequeParams struct {
ID []byte
Amount int64 // Fixed8
User util.Uint160
LockAccount util.Uint160
}
)
const (
// Extra SysFee for contract invocations. Contracts execute inner ring
// invocations in two steps: collection and execution. At collection
// step contract waits for (2\3*n + 1) invocations, and then in execution
// stage contract actually makes changes in the contract storage. SysFee
// for invocation calculated based on testinvoke which happens at collection
// stage. Therefore client has to provide some extra SysFee to operate at
// execution stage. Otherwise invocation will fail due to gas limit.
extraFee = 1_5000_0000 // 1.5 Fixed8 gas
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// Different methods need different extra fee values, so with this
// constants let's try to minimize spent GAS of inner ring node.
feeHalfGas = 50_000_000 // 0.5 Fixed8 gas
feeOneGas = feeHalfGas * 2 // 1.0 Fixed8 gas
checkIsInnerRingMethod = "isInnerRing"
innerRingListMethod = "innerRingList"
chequeMethod = "cheque"
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)
// IsInnerRing returns true if 'key' is presented in inner ring list.
func IsInnerRing(cli *client.Client, con util.Uint160, key *ecdsa.PublicKey) (bool, error) {
if cli == nil {
return false, client.ErrNilClient
}
pubKey := crypto.MarshalPublicKey(key)
val, err := cli.TestInvoke(con, checkIsInnerRingMethod, pubKey)
if err != nil {
return false, err
}
isInnerRing, err := client.BoolFromStackItem(val[0])
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if err != nil {
return false, err
}
return isInnerRing, nil
}
// CashOutCheque invokes Cheque method.
func CashOutCheque(cli *client.Client, con util.Uint160, p *ChequeParams) error {
if cli == nil {
return client.ErrNilClient
}
return cli.Invoke(con, extraFee, chequeMethod,
p.ID,
p.User.BytesBE(),
p.Amount,
p.LockAccount.BytesBE(),
)
}
// InnerRingIndex returns index of the `key` in the inner ring list from sidechain.
// If key is not in the inner ring list, then returns `-1`.
func InnerRingIndex(cli *client.Client, con util.Uint160, key *ecdsa.PublicKey) (int32, error) {
if cli == nil {
return 0, client.ErrNilClient
}
nodePublicKey := crypto.MarshalPublicKey(key)
data, err := cli.TestInvoke(con, innerRingListMethod)
if err != nil {
return 0, err
}
irNodes, err := client.ArrayFromStackItem(data[0])
if err != nil {
return 0, err
}
var result int32 = -1
for i := range irNodes {
key, err := client.ArrayFromStackItem(irNodes[i])
if err != nil {
return 0, err
}
keyValue, err := client.BytesFromStackItem(key[0])
if err != nil {
return 0, err
}
if bytes.Equal(keyValue, nodePublicKey) {
result = int32(i)
break
}
}
return result, nil
}