215 lines
7.1 KiB
Go
215 lines
7.1 KiB
Go
package vm
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import (
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"fmt"
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"github.com/filecoin-project/go-address"
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addr "github.com/filecoin-project/go-address"
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"github.com/filecoin-project/specs-actors/actors/abi"
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"github.com/filecoin-project/specs-actors/actors/crypto"
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"github.com/filecoin-project/specs-actors/actors/runtime"
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vmr "github.com/filecoin-project/specs-actors/actors/runtime"
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"github.com/ipfs/go-cid"
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)
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const (
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GasStorageMulti = 1
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GasComputeMulti = 1
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)
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type GasCharge struct {
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Name string
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Extra interface{}
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ComputeGas int64
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StorageGas int64
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VirtualCompute int64
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VirtualStorage int64
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}
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func (g GasCharge) Total() int64 {
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return g.ComputeGas*GasComputeMulti + g.StorageGas*GasStorageMulti
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}
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func (g GasCharge) WithVirtual(compute, storage int64) GasCharge {
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out := g
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out.VirtualCompute = compute
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out.VirtualStorage = storage
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return out
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}
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func (g GasCharge) WithExtra(extra interface{}) GasCharge {
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out := g
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out.Extra = extra
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return out
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}
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func newGasCharge(name string, computeGas int64, storageGas int64) GasCharge {
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return GasCharge{
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Name: name,
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ComputeGas: computeGas,
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StorageGas: storageGas,
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}
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}
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// Pricelist provides prices for operations in the VM.
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//
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// Note: this interface should be APPEND ONLY since last chain checkpoint
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type Pricelist interface {
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// OnChainMessage returns the gas used for storing a message of a given size in the chain.
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OnChainMessage(msgSize int) GasCharge
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// OnChainReturnValue returns the gas used for storing the response of a message in the chain.
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OnChainReturnValue(dataSize int) GasCharge
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// OnMethodInvocation returns the gas used when invoking a method.
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OnMethodInvocation(value abi.TokenAmount, methodNum abi.MethodNum) GasCharge
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// OnIpldGet returns the gas used for storing an object
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OnIpldGet(dataSize int) GasCharge
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// OnIpldPut returns the gas used for storing an object
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OnIpldPut(dataSize int) GasCharge
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// OnCreateActor returns the gas used for creating an actor
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OnCreateActor() GasCharge
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// OnDeleteActor returns the gas used for deleting an actor
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OnDeleteActor() GasCharge
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OnVerifySignature(sigType crypto.SigType, planTextSize int) (GasCharge, error)
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OnHashing(dataSize int) GasCharge
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OnComputeUnsealedSectorCid(proofType abi.RegisteredSealProof, pieces []abi.PieceInfo) GasCharge
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OnVerifySeal(info abi.SealVerifyInfo) GasCharge
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OnVerifyPost(info abi.WindowPoStVerifyInfo) GasCharge
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OnVerifyConsensusFault() GasCharge
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}
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var prices = map[abi.ChainEpoch]Pricelist{
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abi.ChainEpoch(0): &pricelistV0{
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onChainMessageBase: 0,
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onChainMessagePerByte: 2,
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onChainReturnValuePerByte: 8,
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sendBase: 5,
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sendTransferFunds: 5,
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sendInvokeMethod: 10,
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ipldGetBase: 10,
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ipldGetPerByte: 1,
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ipldPutBase: 20,
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ipldPutPerByte: 2,
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createActorBase: 40, // IPLD put + 20
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createActorExtra: 500,
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deleteActor: -500, // -createActorExtra
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// Dragons: this cost is not persistable, create a LinearCost{a,b} struct that has a `.Cost(x) -> ax + b`
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verifySignature: map[crypto.SigType]func(int64) int64{
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crypto.SigTypeBLS: func(x int64) int64 { return 3*x + 2 },
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crypto.SigTypeSecp256k1: func(x int64) int64 { return 3*x + 2 },
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},
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hashingBase: 5,
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hashingPerByte: 2,
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computeUnsealedSectorCidBase: 100,
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verifySealBase: 2000,
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verifyPostBase: 700,
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verifyConsensusFault: 10,
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},
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}
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// PricelistByEpoch finds the latest prices for the given epoch
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func PricelistByEpoch(epoch abi.ChainEpoch) Pricelist {
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// since we are storing the prices as map or epoch to price
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// we need to get the price with the highest epoch that is lower or equal to the `epoch` arg
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bestEpoch := abi.ChainEpoch(0)
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bestPrice := prices[bestEpoch]
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for e, pl := range prices {
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// if `e` happened after `bestEpoch` and `e` is earlier or equal to the target `epoch`
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if e > bestEpoch && e <= epoch {
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bestEpoch = e
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bestPrice = pl
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}
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}
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if bestPrice == nil {
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panic(fmt.Sprintf("bad setup: no gas prices available for epoch %d", epoch))
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}
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return bestPrice
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}
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type pricedSyscalls struct {
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under vmr.Syscalls
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pl Pricelist
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chargeGas func(GasCharge)
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}
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// Verifies that a signature is valid for an address and plaintext.
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func (ps pricedSyscalls) VerifySignature(signature crypto.Signature, signer addr.Address, plaintext []byte) error {
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c, err := ps.pl.OnVerifySignature(signature.Type, len(plaintext))
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if err != nil {
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return err
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}
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ps.chargeGas(c)
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defer ps.chargeGas(gasOnActorExec)
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return ps.under.VerifySignature(signature, signer, plaintext)
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}
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// Hashes input data using blake2b with 256 bit output.
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func (ps pricedSyscalls) HashBlake2b(data []byte) [32]byte {
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ps.chargeGas(ps.pl.OnHashing(len(data)))
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defer ps.chargeGas(gasOnActorExec)
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return ps.under.HashBlake2b(data)
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}
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// Computes an unsealed sector CID (CommD) from its constituent piece CIDs (CommPs) and sizes.
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func (ps pricedSyscalls) ComputeUnsealedSectorCID(reg abi.RegisteredSealProof, pieces []abi.PieceInfo) (cid.Cid, error) {
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ps.chargeGas(ps.pl.OnComputeUnsealedSectorCid(reg, pieces))
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defer ps.chargeGas(gasOnActorExec)
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return ps.under.ComputeUnsealedSectorCID(reg, pieces)
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}
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// Verifies a sector seal proof.
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func (ps pricedSyscalls) VerifySeal(vi abi.SealVerifyInfo) error {
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ps.chargeGas(ps.pl.OnVerifySeal(vi))
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defer ps.chargeGas(gasOnActorExec)
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return ps.under.VerifySeal(vi)
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}
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// Verifies a proof of spacetime.
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func (ps pricedSyscalls) VerifyPoSt(vi abi.WindowPoStVerifyInfo) error {
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ps.chargeGas(ps.pl.OnVerifyPost(vi))
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defer ps.chargeGas(gasOnActorExec)
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return ps.under.VerifyPoSt(vi)
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}
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// Verifies that two block headers provide proof of a consensus fault:
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// - both headers mined by the same actor
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// - headers are different
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// - first header is of the same or lower epoch as the second
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// - at least one of the headers appears in the current chain at or after epoch `earliest`
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// - the headers provide evidence of a fault (see the spec for the different fault types).
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// The parameters are all serialized block headers. The third "extra" parameter is consulted only for
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// the "parent grinding fault", in which case it must be the sibling of h1 (same parent tipset) and one of the
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// blocks in the parent of h2 (i.e. h2's grandparent).
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// Returns nil and an error if the headers don't prove a fault.
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func (ps pricedSyscalls) VerifyConsensusFault(h1 []byte, h2 []byte, extra []byte) (*runtime.ConsensusFault, error) {
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ps.chargeGas(ps.pl.OnVerifyConsensusFault())
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defer ps.chargeGas(gasOnActorExec)
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return ps.under.VerifyConsensusFault(h1, h2, extra)
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}
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func (ps pricedSyscalls) BatchVerifySeals(inp map[address.Address][]abi.SealVerifyInfo) (map[address.Address][]bool, error) {
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var gasChargeSum GasCharge
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gasChargeSum.Name = "BatchVerifySeals"
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ps.chargeGas(gasChargeSum) // TODO: this is only called by the cron actor. Should we even charge gas?
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defer ps.chargeGas(gasOnActorExec)
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for _, svis := range inp {
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for _, svi := range svis {
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ch := ps.pl.OnVerifySeal(svi)
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ps.chargeGas(newGasCharge("BatchVerifySingle", 0, 0).WithVirtual(ch.VirtualCompute+ch.ComputeGas, 0))
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}
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}
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return ps.under.BatchVerifySeals(inp)
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}
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