f8190f7a91
Alphabet contracts are holders of NEO token in sidechain. Inner ring nodes control sidechain validators list through voting of alphabet contracts. Signed-off-by: Alex Vanin <alexey@nspcc.ru>
129 lines
2.7 KiB
Go
129 lines
2.7 KiB
Go
package alphabetcontract
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import (
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"github.com/nspcc-dev/neo-go/pkg/interop/contract"
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"github.com/nspcc-dev/neo-go/pkg/interop/engine"
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"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
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"github.com/nspcc-dev/neo-go/pkg/interop/storage"
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)
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type (
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irNode struct {
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key []byte
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}
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)
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const (
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// native gas token script hash
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gasHash = "\xbc\xaf\x41\xd6\x84\xc7\xd4\xad\x6e\xe0\xd9\x9d\xa9\x70\x7b\x9d\x1f\x0c\x8e\x66"
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// native neo token script hash
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neoHash = "\x25\x05\x9e\xcb\x48\x78\xd3\xa8\x75\xf9\x1c\x51\xce\xde\xd3\x30\xd4\x57\x5f\xde"
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name = "Jest"
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index = 5
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netmapContractKey = "netmapScriptHash"
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)
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var (
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ctx storage.Context
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)
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func init() {
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if runtime.GetTrigger() != runtime.Application {
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panic("contract has not been called in application node")
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}
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ctx = storage.GetContext()
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}
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func Init(addrNetmap []byte) {
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if storage.Get(ctx, netmapContractKey) != nil {
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panic("contract already deployed")
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}
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if len(addrNetmap) != 20 {
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panic("incorrect length of contract script hash")
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}
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storage.Put(ctx, netmapContractKey, addrNetmap)
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runtime.Log(name + " contract initialized")
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}
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func Gas() int {
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contractHash := runtime.GetExecutingScriptHash()
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return balance(gasHash, contractHash)
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}
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func Neo() int {
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contractHash := runtime.GetExecutingScriptHash()
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return balance(neoHash, contractHash)
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}
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func balance(hash string, addr []byte) int {
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balance := engine.AppCall([]byte(hash), "balanceOf", addr)
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return balance.(int)
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}
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func irList() []irNode {
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netmapContractAddr := storage.Get(ctx, netmapContractKey).([]byte)
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return engine.AppCall(netmapContractAddr, "innerRingList").([]irNode)
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}
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func checkPermission(ir []irNode) bool {
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if len(ir) <= index {
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return false
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}
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node := ir[index]
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return runtime.CheckWitness(node.key)
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}
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func Emit() bool {
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innerRingKeys := irList()
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if !checkPermission(innerRingKeys) {
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panic("invalid invoker")
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}
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contractHash := runtime.GetExecutingScriptHash()
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neo := balance(neoHash, contractHash)
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_ = engine.AppCall([]byte(neoHash), "transfer", contractHash, contractHash, neo)
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gas := balance(gasHash, contractHash)
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gasPerNode := gas * 7 / 8 / len(innerRingKeys)
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if gasPerNode == 0 {
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runtime.Log("no gas to emit")
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return false
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}
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for i := range innerRingKeys {
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node := innerRingKeys[i]
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address := contract.CreateStandardAccount(node.key)
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_ = engine.AppCall([]byte(gasHash), "transfer", contractHash, address, gasPerNode)
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}
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runtime.Log("utility token has been emitted to inner ring nodes")
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return true
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}
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func Vote(candidate []byte) {
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innerRingKeys := irList()
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if !checkPermission(innerRingKeys) {
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panic("invalid invoker")
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}
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address := runtime.GetExecutingScriptHash()
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_ = engine.AppCall([]byte(neoHash), "vote", address, candidate)
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return
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}
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func Name() string {
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return name
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}
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