frostfs-contract/common/ir.go

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package common
import (
"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/native/ledger"
"github.com/nspcc-dev/neo-go/pkg/interop/native/neo"
"github.com/nspcc-dev/neo-go/pkg/interop/native/roles"
"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
)
type IRNode struct {
PublicKey interop.PublicKey
}
const irListMethod = "innerRingList"
// InnerRingInvoker returns the public key of the inner ring node that has invoked the contract.
// Work around for environments without notary support.
func InnerRingInvoker(ir []interop.PublicKey) interop.PublicKey {
for i := 0; i < len(ir); i++ {
node := ir[i]
if runtime.CheckWitness(node) {
return node
}
}
return nil
}
// InnerRingNodes return a list of inner ring nodes from state validator role
// in the sidechain.
func InnerRingNodes() []interop.PublicKey {
blockHeight := ledger.CurrentIndex()
return roles.GetDesignatedByRole(roles.NeoFSAlphabet, uint32(blockHeight+1))
}
// InnerRingNodesFromNetmap gets a list of inner ring nodes through
// calling "innerRingList" method of smart contract.
// Work around for environments without notary support.
func InnerRingNodesFromNetmap(sc interop.Hash160) []interop.PublicKey {
nodes := contract.Call(sc, irListMethod, contract.ReadOnly).([]IRNode)
pubs := []interop.PublicKey{}
for i := range nodes {
pubs = append(pubs, nodes[i].PublicKey)
}
return pubs
}
// AlphabetNodes returns a list of alphabet nodes from committee in the sidechain.
func AlphabetNodes() []interop.PublicKey {
return neo.GetCommittee()
}
// AlphabetAddress returns multi address of alphabet public keys.
func AlphabetAddress() []byte {
alphabet := neo.GetCommittee()
return Multiaddress(alphabet, false)
}
// CommitteeAddress returns multi address of committee.
func CommitteeAddress() []byte {
committee := neo.GetCommittee()
return Multiaddress(committee, true)
}
// Multiaddress returns default multisignature account address for N keys.
// If committee set to true, it is `M = N/2+1` committee account.
func Multiaddress(n []interop.PublicKey, committee bool) []byte {
threshold := len(n)*2/3 + 1
if committee {
threshold = len(n)/2 + 1
}
return contract.CreateMultisigAccount(threshold, n)
}