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https://github.com/nspcc-dev/neo-go.git
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30836ca69b
The notion of NativeContractState shouldn't ever existed, native contract is a contract and its state is saved as regular contract state which is critical because we'll have MPT calculations over this state soon. Initial minting should be done in Neo.Native.Deploy because it generates notification that should have proper transaction context. RegisterNative() shouldn't exist as a public method, native contracts are only registered at block 0 and they can do it internally, no outside user should be able to mess with it. Move some structures from `native` package to `interop` also to avoid circular references as interop.Context has to have a list of native contracts (exposing them via Blockchainer is again too dangerous, it's too powerful tool).
119 lines
3.4 KiB
Go
119 lines
3.4 KiB
Go
package interop
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import (
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"github.com/nspcc-dev/neo-go/pkg/core/block"
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"github.com/nspcc-dev/neo-go/pkg/core/blockchainer"
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"github.com/nspcc-dev/neo-go/pkg/core/dao"
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"github.com/nspcc-dev/neo-go/pkg/core/state"
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"github.com/nspcc-dev/neo-go/pkg/core/transaction"
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"github.com/nspcc-dev/neo-go/pkg/crypto"
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"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
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"github.com/nspcc-dev/neo-go/pkg/io"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"github.com/nspcc-dev/neo-go/pkg/vm"
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"github.com/nspcc-dev/neo-go/pkg/vm/emit"
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"go.uber.org/zap"
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)
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// Context represents context in which interops are executed.
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type Context struct {
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Chain blockchainer.Blockchainer
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Container crypto.Verifiable
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Natives []Contract
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Trigger trigger.Type
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Block *block.Block
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Tx *transaction.Transaction
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DAO *dao.Cached
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Notifications []state.NotificationEvent
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Log *zap.Logger
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}
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// NewContext returns new interop context.
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func NewContext(trigger trigger.Type, bc blockchainer.Blockchainer, d dao.DAO, natives []Contract, block *block.Block, tx *transaction.Transaction, log *zap.Logger) *Context {
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dao := dao.NewCached(d)
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nes := make([]state.NotificationEvent, 0)
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return &Context{
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Chain: bc,
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Natives: natives,
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Trigger: trigger,
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Block: block,
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Tx: tx,
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DAO: dao,
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Notifications: nes,
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Log: log,
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}
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}
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// Function binds function name, id with the function itself and price,
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// it's supposed to be inited once for all interopContexts, so it doesn't use
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// vm.InteropFuncPrice directly.
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type Function struct {
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ID uint32
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Name string
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Func func(*Context, *vm.VM) error
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Price int
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}
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// Method is a signature for a native method.
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type Method = func(ic *Context, args []vm.StackItem) vm.StackItem
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// MethodAndPrice is a native-contract method descriptor.
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type MethodAndPrice struct {
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Func Method
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Price int64
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RequiredFlags smartcontract.CallFlag
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}
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// Contract is an interface for all native contracts.
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type Contract interface {
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Initialize(*Context) error
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Metadata() *ContractMD
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OnPersist(*Context) error
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}
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// ContractMD represents native contract instance.
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type ContractMD struct {
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Manifest manifest.Manifest
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ServiceName string
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ServiceID uint32
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Script []byte
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Hash util.Uint160
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Methods map[string]MethodAndPrice
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}
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// NewContractMD returns Contract with the specified list of methods.
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func NewContractMD(name string) *ContractMD {
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c := &ContractMD{
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ServiceName: name,
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ServiceID: emit.InteropNameToID([]byte(name)),
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Methods: make(map[string]MethodAndPrice),
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}
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w := io.NewBufBinWriter()
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emit.Syscall(w.BinWriter, c.ServiceName)
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c.Script = w.Bytes()
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c.Hash = hash.Hash160(c.Script)
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c.Manifest = *manifest.DefaultManifest(c.Hash)
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return c
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}
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// AddMethod adds new method to a native contract.
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func (c *ContractMD) AddMethod(md *MethodAndPrice, desc *manifest.Method, safe bool) {
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c.Manifest.ABI.Methods = append(c.Manifest.ABI.Methods, *desc)
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c.Methods[desc.Name] = *md
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if safe {
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c.Manifest.SafeMethods.Add(desc.Name)
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}
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}
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// AddEvent adds new event to a native contract.
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func (c *ContractMD) AddEvent(name string, ps ...manifest.Parameter) {
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c.Manifest.ABI.Events = append(c.Manifest.ABI.Events, manifest.Event{
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Name: name,
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Parameters: ps,
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})
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}
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