mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-12-25 03:56:34 +00:00
37d44b94e1
Preview2 testnet:
file BlockStorage_100000/dump-block-12000.json: block 11562: key mismatch: feffffff1454a6cb279fbcedc66162ad4ad5d1d910202b92743e000000000000000000000005 vs feffffff1431b7e7aea5131f74721e002c6a56b610885813f79e000000000000000000000005
Originally this code was written to run after transactions processing, but
after 0fa4c49735 it works in different manner.
123 lines
3.1 KiB
Go
123 lines
3.1 KiB
Go
package native
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import (
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"errors"
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"fmt"
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"math/big"
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"github.com/nspcc-dev/neo-go/pkg/core/interop"
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"github.com/nspcc-dev/neo-go/pkg/core/state"
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"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
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"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/util"
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)
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// GAS represents GAS native contract.
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type GAS struct {
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nep5TokenNative
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NEO *NEO
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}
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const gasSyscallName = "Neo.Native.Tokens.GAS"
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const gasContractID = -2
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// GASFactor is a divisor for finding GAS integral value.
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const GASFactor = NEOTotalSupply
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const initialGAS = 30000000
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// NewGAS returns GAS native contract.
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func NewGAS() *GAS {
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g := &GAS{}
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nep5 := newNEP5Native(gasSyscallName)
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nep5.name = "GAS"
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nep5.symbol = "gas"
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nep5.decimals = 8
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nep5.factor = GASFactor
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nep5.onPersist = chainOnPersist(nep5.OnPersist, g.OnPersist)
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nep5.incBalance = g.increaseBalance
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nep5.ContractID = gasContractID
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g.nep5TokenNative = *nep5
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onp := g.Methods["onPersist"]
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onp.Func = getOnPersistWrapper(g.onPersist)
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g.Methods["onPersist"] = onp
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return g
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}
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func (g *GAS) increaseBalance(_ *interop.Context, _ util.Uint160, si *state.StorageItem, amount *big.Int) error {
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acc, err := state.NEP5BalanceStateFromBytes(si.Value)
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if err != nil {
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return err
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}
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if sign := amount.Sign(); sign == 0 {
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return nil
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} else if sign == -1 && acc.Balance.Cmp(new(big.Int).Neg(amount)) == -1 {
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return errors.New("insufficient funds")
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}
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acc.Balance.Add(&acc.Balance, amount)
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si.Value = acc.Bytes()
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return nil
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}
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// Initialize initializes GAS contract.
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func (g *GAS) Initialize(ic *interop.Context) error {
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if err := g.nep5TokenNative.Initialize(ic); err != nil {
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return err
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}
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if g.nep5TokenNative.getTotalSupply(ic).Sign() != 0 {
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return errors.New("already initialized")
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}
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h, _, err := getStandbyValidatorsHash(ic)
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if err != nil {
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return err
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}
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g.mint(ic, h, big.NewInt(initialGAS*GASFactor))
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return nil
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}
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// OnPersist implements Contract interface.
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func (g *GAS) OnPersist(ic *interop.Context) error {
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if len(ic.Block.Transactions) == 0 {
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return nil
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}
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for _, tx := range ic.Block.Transactions {
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absAmount := big.NewInt(int64(tx.SystemFee + tx.NetworkFee))
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g.burn(ic, tx.Sender, absAmount)
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}
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validators, err := g.NEO.GetNextBlockValidatorsInternal(ic.Chain, ic.DAO)
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if err != nil {
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return fmt.Errorf("cannot get block validators: %v", err)
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}
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primary := validators[ic.Block.ConsensusData.PrimaryIndex].GetScriptHash()
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var netFee util.Fixed8
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for _, tx := range ic.Block.Transactions {
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netFee += tx.NetworkFee
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}
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g.mint(ic, primary, big.NewInt(int64(netFee)))
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return nil
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}
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func getStandbyValidatorsHash(ic *interop.Context) (util.Uint160, []*keys.PublicKey, error) {
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vs := ic.Chain.GetStandByValidators()
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s, err := smartcontract.CreateMultiSigRedeemScript(len(vs)/2+1, vs)
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if err != nil {
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return util.Uint160{}, nil, err
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}
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return hash.Hash160(s), vs, nil
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}
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func chainOnPersist(fs ...func(*interop.Context) error) func(*interop.Context) error {
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return func(ic *interop.Context) error {
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for i := range fs {
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if fs[i] != nil {
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if err := fs[i](ic); err != nil {
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return err
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}
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}
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}
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return nil
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}
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}
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