400 lines
12 KiB
Go
400 lines
12 KiB
Go
package vm
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import (
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"encoding/binary"
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"fmt"
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"net/url"
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"strings"
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"github.com/tendermint/iavl"
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"github.com/tendermint/tendermint/crypto/merkle"
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cmn "github.com/tendermint/tendermint/libs/common"
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v1 "github.com/ethereum/go-ethereum/core/vm/lightclient/v1"
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v2 "github.com/ethereum/go-ethereum/core/vm/lightclient/v2"
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"github.com/ethereum/go-ethereum/params"
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)
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const (
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uint64TypeLength uint64 = 8
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precompileContractInputMetaDataLength uint64 = 32
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consensusStateLengthBytesLength uint64 = 32
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tmHeaderValidateResultMetaDataLength uint64 = 32
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merkleProofValidateResultLength uint64 = 32
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)
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// input:
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// consensus state length | consensus state | tendermint header |
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// 32 bytes | | |
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func decodeTendermintHeaderValidationInput(input []byte) (*v1.ConsensusState, *v1.Header, error) {
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csLen := binary.BigEndian.Uint64(input[consensusStateLengthBytesLength-uint64TypeLength : consensusStateLengthBytesLength])
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if consensusStateLengthBytesLength+csLen < consensusStateLengthBytesLength {
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return nil, nil, fmt.Errorf("integer overflow, csLen: %d", csLen)
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}
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if uint64(len(input)) <= consensusStateLengthBytesLength+csLen {
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return nil, nil, fmt.Errorf("expected payload size %d, actual size: %d", consensusStateLengthBytesLength+csLen, len(input))
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}
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cs, err := v1.DecodeConsensusState(input[consensusStateLengthBytesLength : consensusStateLengthBytesLength+csLen])
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if err != nil {
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return nil, nil, err
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}
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header, err := v1.DecodeHeader(input[consensusStateLengthBytesLength+csLen:])
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if err != nil {
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return nil, nil, err
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}
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return &cs, header, nil
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}
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// tmHeaderValidate implemented as a native contract. Used to validate the light
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// client's new header for tendermint v0.31.12 and its compatible version.
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type tmHeaderValidate struct{}
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func (c *tmHeaderValidate) RequiredGas(input []byte) uint64 {
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return params.TendermintHeaderValidateGas
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}
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func (c *tmHeaderValidate) Run(input []byte) (result []byte, err error) {
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defer func() {
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if r := recover(); r != nil {
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err = fmt.Errorf("internal error: %v\n", r)
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}
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}()
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if uint64(len(input)) <= precompileContractInputMetaDataLength {
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return nil, fmt.Errorf("invalid input")
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}
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payloadLength := binary.BigEndian.Uint64(input[precompileContractInputMetaDataLength-uint64TypeLength : precompileContractInputMetaDataLength])
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if uint64(len(input)) != payloadLength+precompileContractInputMetaDataLength {
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return nil, fmt.Errorf("invalid input: input size should be %d, actual the size is %d", payloadLength+precompileContractInputMetaDataLength, len(input))
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}
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cs, header, err := decodeTendermintHeaderValidationInput(input[precompileContractInputMetaDataLength:])
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if err != nil {
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return nil, err
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}
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validatorSetChanged, err := cs.ApplyHeader(header)
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if err != nil {
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return nil, err
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}
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consensusStateBytes, err := cs.EncodeConsensusState()
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if err != nil {
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return nil, err
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}
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// result
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// | validatorSetChanged | empty | consensusStateBytesLength | new consensusState |
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// | 1 byte | 23 bytes | 8 bytes | |
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lengthBytes := make([]byte, tmHeaderValidateResultMetaDataLength)
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if validatorSetChanged {
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copy(lengthBytes[:1], []byte{0x01})
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}
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consensusStateBytesLength := uint64(len(consensusStateBytes))
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binary.BigEndian.PutUint64(lengthBytes[tmHeaderValidateResultMetaDataLength-uint64TypeLength:], consensusStateBytesLength)
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result = append(lengthBytes, consensusStateBytes...)
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return result, nil
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}
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//------------------------------------------------------------------------------------------------------------------------------------------------
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// iavlMerkleProofValidate implemented as a native contract.
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type iavlMerkleProofValidate struct {
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basicIavlMerkleProofValidate
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}
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func (c *iavlMerkleProofValidate) RequiredGas(input []byte) uint64 {
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return params.IAVLMerkleProofValidateGas
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}
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// input:
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// | payload length | payload |
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// | 32 bytes | |
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func (c *iavlMerkleProofValidate) Run(input []byte) (result []byte, err error) {
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return c.basicIavlMerkleProofValidate.Run(input)
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}
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// tmHeaderValidate implemented as a native contract.
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type tmHeaderValidateNano struct{}
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func (c *tmHeaderValidateNano) RequiredGas(input []byte) uint64 {
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return params.TendermintHeaderValidateGas
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}
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func (c *tmHeaderValidateNano) Run(input []byte) (result []byte, err error) {
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return nil, fmt.Errorf("suspend")
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}
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type iavlMerkleProofValidateNano struct{}
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func (c *iavlMerkleProofValidateNano) RequiredGas(_ []byte) uint64 {
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return params.IAVLMerkleProofValidateGas
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}
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func (c *iavlMerkleProofValidateNano) Run(_ []byte) (result []byte, err error) {
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return nil, fmt.Errorf("suspend")
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}
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// ------------------------------------------------------------------------------------------------------------------------------------------------
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type iavlMerkleProofValidateMoran struct {
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basicIavlMerkleProofValidate
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}
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func (c *iavlMerkleProofValidateMoran) RequiredGas(_ []byte) uint64 {
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return params.IAVLMerkleProofValidateGas
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}
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func (c *iavlMerkleProofValidateMoran) Run(input []byte) (result []byte, err error) {
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c.basicIavlMerkleProofValidate.verifiers = []merkle.ProofOpVerifier{
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forbiddenAbsenceOpVerifier,
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singleValueOpVerifier,
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multiStoreOpVerifier,
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forbiddenSimpleValueOpVerifier,
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}
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return c.basicIavlMerkleProofValidate.Run(input)
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}
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type iavlMerkleProofValidatePlanck struct {
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basicIavlMerkleProofValidate
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}
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func (c *iavlMerkleProofValidatePlanck) RequiredGas(_ []byte) uint64 {
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return params.IAVLMerkleProofValidateGas
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}
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func (c *iavlMerkleProofValidatePlanck) Run(input []byte) (result []byte, err error) {
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c.basicIavlMerkleProofValidate.proofRuntime = v1.Ics23CompatibleProofRuntime()
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c.basicIavlMerkleProofValidate.verifiers = []merkle.ProofOpVerifier{
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forbiddenAbsenceOpVerifier,
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singleValueOpVerifier,
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multiStoreOpVerifier,
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forbiddenSimpleValueOpVerifier,
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}
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c.basicIavlMerkleProofValidate.keyVerifier = keyVerifier
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c.basicIavlMerkleProofValidate.opsVerifier = proofOpsVerifier
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return c.basicIavlMerkleProofValidate.Run(input)
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}
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type iavlMerkleProofValidatePlato struct {
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basicIavlMerkleProofValidate
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}
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func (c *iavlMerkleProofValidatePlato) RequiredGas(_ []byte) uint64 {
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return params.IAVLMerkleProofValidateGas
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}
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func (c *iavlMerkleProofValidatePlato) Run(input []byte) (result []byte, err error) {
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c.basicIavlMerkleProofValidate.proofRuntime = v1.Ics23ProofRuntime()
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c.basicIavlMerkleProofValidate.verifiers = []merkle.ProofOpVerifier{
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forbiddenAbsenceOpVerifier,
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singleValueOpVerifier,
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multiStoreOpVerifier,
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forbiddenSimpleValueOpVerifier,
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}
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c.basicIavlMerkleProofValidate.keyVerifier = keyVerifier
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c.basicIavlMerkleProofValidate.opsVerifier = proofOpsVerifier
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return c.basicIavlMerkleProofValidate.Run(input)
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}
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func successfulMerkleResult() []byte {
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result := make([]byte, merkleProofValidateResultLength)
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binary.BigEndian.PutUint64(result[merkleProofValidateResultLength-uint64TypeLength:], 0x01)
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return result
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}
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type basicIavlMerkleProofValidate struct {
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keyVerifier v1.KeyVerifier
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opsVerifier merkle.ProofOpsVerifier
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verifiers []merkle.ProofOpVerifier
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proofRuntime *merkle.ProofRuntime
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}
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func (c *basicIavlMerkleProofValidate) Run(input []byte) (result []byte, err error) {
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defer func() {
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if r := recover(); r != nil {
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err = fmt.Errorf("internal error: %v\n", r)
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}
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}()
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if uint64(len(input)) <= precompileContractInputMetaDataLength {
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return nil, fmt.Errorf("invalid input: input should include %d bytes payload length and payload", precompileContractInputMetaDataLength)
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}
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payloadLength := binary.BigEndian.Uint64(input[precompileContractInputMetaDataLength-uint64TypeLength : precompileContractInputMetaDataLength])
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if uint64(len(input)) != payloadLength+precompileContractInputMetaDataLength {
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return nil, fmt.Errorf("invalid input: input size should be %d, actual the size is %d", payloadLength+precompileContractInputMetaDataLength, len(input))
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}
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kvmp, err := v1.DecodeKeyValueMerkleProof(input[precompileContractInputMetaDataLength:])
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if err != nil {
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return nil, err
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}
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if c.proofRuntime == nil {
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kvmp.SetProofRuntime(v1.DefaultProofRuntime())
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} else {
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kvmp.SetProofRuntime(c.proofRuntime)
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}
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kvmp.SetVerifiers(c.verifiers)
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kvmp.SetOpsVerifier(c.opsVerifier)
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kvmp.SetKeyVerifier(c.keyVerifier)
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valid := kvmp.Validate()
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if !valid {
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return nil, fmt.Errorf("invalid merkle proof")
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}
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return successfulMerkleResult(), nil
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}
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func forbiddenAbsenceOpVerifier(op merkle.ProofOperator) error {
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if op == nil {
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return nil
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}
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if _, ok := op.(iavl.IAVLAbsenceOp); ok {
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return cmn.NewError("absence proof suspend")
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}
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return nil
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}
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func forbiddenSimpleValueOpVerifier(op merkle.ProofOperator) error {
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if op == nil {
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return nil
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}
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if _, ok := op.(merkle.SimpleValueOp); ok {
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return cmn.NewError("simple value proof suspend")
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}
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return nil
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}
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func multiStoreOpVerifier(op merkle.ProofOperator) error {
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if op == nil {
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return nil
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}
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if mop, ok := op.(v1.MultiStoreProofOp); ok {
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storeNames := make(map[string]bool, len(mop.Proof.StoreInfos))
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for _, store := range mop.Proof.StoreInfos {
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if exist := storeNames[store.Name]; exist {
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return cmn.NewError("duplicated store")
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} else {
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storeNames[store.Name] = true
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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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func singleValueOpVerifier(op merkle.ProofOperator) error {
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if op == nil {
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return nil
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}
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if valueOp, ok := op.(iavl.IAVLValueOp); ok {
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if len(valueOp.Proof.Leaves) != 1 {
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return cmn.NewError("range proof suspended")
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}
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for _, innerNode := range valueOp.Proof.LeftPath {
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if len(innerNode.Right) > 0 && len(innerNode.Left) > 0 {
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return cmn.NewError("both right and left hash exit!")
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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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func proofOpsVerifier(poz merkle.ProofOperators) error {
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if len(poz) != 2 {
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return cmn.NewError("proof ops should be 2")
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}
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// for legacy proof type
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if _, ok := poz[1].(v1.MultiStoreProofOp); ok {
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if _, ok := poz[0].(iavl.IAVLValueOp); !ok {
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return cmn.NewError("invalid proof op")
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}
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return nil
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}
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// for ics23 proof type
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if op2, ok := poz[1].(v1.CommitmentOp); ok {
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if op2.Type != v1.ProofOpSimpleMerkleCommitment {
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return cmn.NewError("invalid proof op")
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}
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op1, ok := poz[0].(v1.CommitmentOp)
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if !ok {
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return cmn.NewError("invalid proof op")
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}
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if op1.Type != v1.ProofOpIAVLCommitment {
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return cmn.NewError("invalid proof op")
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}
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return nil
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}
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return cmn.NewError("invalid proof type")
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}
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func keyVerifier(key string) error {
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// https://github.com/bnb-chain/tendermint/blob/72375a6f3d4a72831cc65e73363db89a0073db38/crypto/merkle/proof_key_path.go#L88
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// since the upper function is ambiguous, `x:00` can be decoded to both kind of key type
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// we check the key here to make sure the key will not start from `x:`
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if strings.HasPrefix(url.PathEscape(key), "x:") {
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return cmn.NewError("key should not start with x:")
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}
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return nil
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}
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// cometBFTLightBlockValidate implemented as a native contract. Used to validate the light blocks for CometBFT v0.37.0
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// and its compatible version. Besides, in order to support the BLS cross-chain infrastructure, the SetRelayerAddress
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// and SetBlsKey methods should be implemented for the validator.
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type cometBFTLightBlockValidate struct{}
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func (c *cometBFTLightBlockValidate) RequiredGas(input []byte) uint64 {
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return params.CometBFTLightBlockValidateGas
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}
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func (c *cometBFTLightBlockValidate) run(input []byte, isHertz bool) (result []byte, err error) {
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defer func() {
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if r := recover(); r != nil {
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err = fmt.Errorf("internal error: %v\n", r)
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}
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}()
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cs, block, err := v2.DecodeLightBlockValidationInput(input)
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if err != nil {
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return nil, err
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}
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validatorSetChanged, err := cs.ApplyLightBlock(block, isHertz)
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if err != nil {
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return nil, err
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}
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consensusStateBytes, err := cs.EncodeConsensusState()
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if err != nil {
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return nil, err
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}
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result = v2.EncodeLightBlockValidationResult(validatorSetChanged, consensusStateBytes)
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return result, nil
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}
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func (c *cometBFTLightBlockValidate) Run(input []byte) (result []byte, err error) {
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return c.run(input, false)
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}
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type cometBFTLightBlockValidateHertz struct {
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cometBFTLightBlockValidate
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}
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func (c *cometBFTLightBlockValidateHertz) Run(input []byte) (result []byte, err error) {
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return c.run(input, true)
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}
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