frostfs-contract/proxy/proxy_contract.go

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package proxy
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/gas"
"github.com/nspcc-dev/neo-go/pkg/interop/native/management"
"github.com/nspcc-dev/neo-go/pkg/interop/native/neo"
"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
"github.com/nspcc-dev/neo-go/pkg/interop/storage"
"github.com/nspcc-dev/neofs-contract/common"
)
const (
netmapContractKey = "netmapScriptHash"
)
// OnNEP17Payment is a callback for NEP-17 compatible native GAS contract.
func OnNEP17Payment(from interop.Hash160, amount int, data interface{}) {
caller := runtime.GetCallingScriptHash()
if !common.BytesEqual(caller, []byte(gas.Hash)) {
panic("onNEP17Payment: proxy contract accepts GAS only")
}
}
func _deploy(data interface{}, isUpdate bool) {
if isUpdate {
return
}
args := data.([]interface{})
addrNetmap := args[0].(interop.Hash160)
ctx := storage.GetContext()
if len(addrNetmap) != 20 {
panic("init: incorrect length of contract script hash")
}
storage.Put(ctx, netmapContractKey, addrNetmap)
runtime.Log("proxy contract initialized")
}
// Update method updates contract source code and manifest. Can be invoked
// only by committee.
func Update(script []byte, manifest []byte, data interface{}) {
if !common.HasUpdateAccess() {
panic("only committee can update contract")
}
contract.Call(interop.Hash160(management.Hash), "update",
contract.All, script, manifest, common.AppendVersion(data))
runtime.Log("proxy contract updated")
}
// Verify method returns true if transaction contains valid multi signature of
// Alphabet nodes of the Inner Ring.
func Verify() bool {
alphabet := neo.GetCommittee()
sig := common.Multiaddress(alphabet, false)
if !runtime.CheckWitness(sig) {
sig = common.Multiaddress(alphabet, true)
return runtime.CheckWitness(sig)
}
return true
}
// Version returns version of the contract.
func Version() int {
return common.Version
}