/
spork.go
140 lines (120 loc) · 4.02 KB
/
spork.go
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package implementation
import (
"github.com/zenon-network/go-zenon/chain/nom"
"github.com/zenon-network/go-zenon/common"
"github.com/zenon-network/go-zenon/common/types"
"github.com/zenon-network/go-zenon/vm/constants"
"github.com/zenon-network/go-zenon/vm/embedded/definition"
"github.com/zenon-network/go-zenon/vm/vm_context"
)
var (
sporkLog = common.EmbeddedLogger.New("contract", "spork")
)
type CreateSporkMethod struct {
MethodName string
}
func checkSporkMetaDataStatic(sporkInfo *definition.Spork) error {
if len(sporkInfo.Name) < constants.SporkNameMinLength || len(sporkInfo.Name) > constants.SporkNameMaxLength {
return constants.ErrForbiddenParam
}
if len(sporkInfo.Description) > constants.SporkDescriptionMaxLength {
return constants.ErrForbiddenParam
}
return nil
}
func (p *CreateSporkMethod) GetPlasma(plasmaTable *constants.PlasmaTable) (uint64, error) {
return plasmaTable.EmbeddedSimple, nil
}
func (p *CreateSporkMethod) ValidateSendBlock(block *nom.AccountBlock) error {
if block.Address != *types.SporkAddress {
return constants.ErrPermissionDenied
}
if block.Amount.Sign() != 0 {
return constants.ErrInvalidTokenOrAmount
}
spork := new(definition.Spork)
err := definition.ABISpork.UnpackMethod(spork, p.MethodName, block.Data)
if err != nil {
return constants.ErrForbiddenParam
}
// Repack for consistency
block.Data, err = definition.ABISpork.PackMethod(p.MethodName, spork.Name, spork.Description)
if err != nil {
return constants.ErrForbiddenParam
}
// Check valid spork information
err = checkSporkMetaDataStatic(spork)
if err != nil {
return err
}
return nil
}
func (p *CreateSporkMethod) ReceiveBlock(context vm_context.AccountVmContext, sendBlock *nom.AccountBlock) ([]*nom.AccountBlock, error) {
if err := p.ValidateSendBlock(sendBlock); err != nil {
sporkLog.Debug("invalid create - syntactic validation failed", "address", sendBlock.Address, "reason", err)
return nil, err
}
spork := new(definition.Spork)
err := definition.ABISpork.UnpackMethod(spork, p.MethodName, sendBlock.Data)
if err != nil {
return nil, constants.ErrForbiddenParam
}
// Check valid spork information
err = checkSporkMetaDataStatic(spork)
if err != nil {
return nil, err
}
spork.Activated = false
spork.EnforcementHeight = 0
spork.Id = sendBlock.Hash
spork.Save(context.Storage())
sporkLog.Debug("created", "spork", spork)
return nil, nil
}
type ActivateSporkMethod struct {
MethodName string
}
func (p *ActivateSporkMethod) GetPlasma(plasmaTable *constants.PlasmaTable) (uint64, error) {
return plasmaTable.EmbeddedSimple, nil
}
func (p *ActivateSporkMethod) ValidateSendBlock(block *nom.AccountBlock) error {
var err error
if block.Address != *types.SporkAddress {
return constants.ErrPermissionDenied
}
id := new(types.Hash)
if err := definition.ABISpork.UnpackMethod(id, p.MethodName, block.Data); err != nil {
return constants.ErrUnpackError
}
if block.Amount.Sign() != 0 {
return constants.ErrInvalidTokenOrAmount
}
block.Data, err = definition.ABISpork.PackMethod(p.MethodName, id)
return err
}
func (p *ActivateSporkMethod) ReceiveBlock(context vm_context.AccountVmContext, sendBlock *nom.AccountBlock) ([]*nom.AccountBlock, error) {
if err := p.ValidateSendBlock(sendBlock); err != nil {
sporkLog.Debug("invalid spork activation - syntactic validation failed", "address", sendBlock.Address, "reason", err)
return nil, err
}
id := new(types.Hash)
err := definition.ABISpork.UnpackMethod(id, p.MethodName, sendBlock.Data)
if err != nil {
return nil, constants.ErrForbiddenParam
}
// Make sure spork exists
spork := definition.GetSporkInfoById(context.Storage(), *id)
if spork == nil {
return nil, constants.ErrDataNonExistent
}
if spork.Activated {
return nil, constants.ErrAlreadyActivated
}
spork.Activated = true
frontierMomentum, err := context.GetFrontierMomentum()
common.DealWithErr(err)
spork.EnforcementHeight = frontierMomentum.Height + constants.SporkMinHeightDelay
spork.Save(context.Storage())
sporkLog.Debug("activated", "spork", spork)
return nil, nil
}