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msg_server.go
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msg_server.go
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package keeper
import (
"bytes"
"context"
"encoding/base64"
"encoding/hex"
"encoding/json"
"fmt"
"os"
"os/exec"
"strings"
"github.com/hyle-org/hyle/x/zktx"
"github.com/hyle-org/hyle/x/zktx/keeper/gnark"
"github.com/consensys/gnark/backend/groth16"
)
// For clarity, split from ValidateProofData
func SetContextIfNeeded(proofData zktx.HyleOutput, hyleContext *zktx.HyleContext) error {
// Only do this on the first call
if hyleContext.Caller != "" {
return nil
}
hyleContext.Origin = proofData.Origin
return nil
}
// TODO check block number, block time and tx hash
func ValidateProofData(proofData zktx.HyleOutput, initialState []byte, hyleContext *zktx.HyleContext) error {
if !bytes.Equal(proofData.InitialState, initialState) {
return fmt.Errorf("verifier output does not match the expected initial state")
}
// Assume that if the proof has an empty origin/caller, it's "free for all"
if proofData.Origin != "" && proofData.Origin != hyleContext.Origin {
return fmt.Errorf("verifier output does not match the expected origin")
}
if proofData.Caller != "" && proofData.Caller != hyleContext.Caller {
return fmt.Errorf("verifier output does not match the expected caller")
}
return nil
}
type msgServer struct {
k Keeper
}
var _ zktx.MsgServer = msgServer{}
var risczeroVerifierPath = os.Getenv("RISCZERO_VERIFIER_PATH")
var sp1VerifierPath = os.Getenv("SP1_VERIFIER_PATH")
var noirVerifierPath = os.Getenv("NOIR_VERIFIER_PATH")
// NewMsgServerImpl returns an implementation of the module MsgServer interface.
func NewMsgServerImpl(keeper Keeper) zktx.MsgServer {
if risczeroVerifierPath == "" {
risczeroVerifierPath = "/hyle/risc0-verifier"
}
if sp1VerifierPath == "" {
sp1VerifierPath = "/hyle/sp1-verifier"
}
if noirVerifierPath == "" {
noirVerifierPath = "/hyle/noir-verifier"
}
return &msgServer{k: keeper}
}
func (ms msgServer) ExecuteStateChanges(ctx context.Context, msg *zktx.MsgExecuteStateChanges) (*zktx.MsgExecuteStateChangesResponse, error) {
if len(msg.StateChanges) == 0 {
return &zktx.MsgExecuteStateChangesResponse{}, nil
}
// Initialize context with unknown data at this point
hyleContext := zktx.HyleContext{
Origin: "",
Caller: "",
BlockTime: 0,
BlockNb: 0,
TxHash: []byte("TODO"),
}
for i, stateChange := range msg.StateChanges {
if err := ms.actuallyExecuteStateChange(ctx, &hyleContext, stateChange); err != nil {
return nil, err
}
if i == 0 && hyleContext.Origin != "" {
// Check origin matches contract name
paths := strings.Split(hyleContext.Origin, ".")
if len(paths) < 2 || paths[len(paths)-1] != stateChange.ContractName {
return nil, fmt.Errorf("invalid origin contract, expected '%s', got '%s'", stateChange.ContractName, paths[len(paths)-1])
}
}
}
return &zktx.MsgExecuteStateChangesResponse{}, nil
}
func (ms msgServer) actuallyExecuteStateChange(ctx context.Context, hyleContext *zktx.HyleContext, msg *zktx.StateChange) error {
contract, err := ms.k.Contracts.Get(ctx, msg.ContractName)
if err != nil {
return fmt.Errorf("invalid contract - no state is registered")
}
var finalStateDigest []byte
if contract.Verifier == "risczero" {
// Save proof to a local file
err = os.WriteFile("/tmp/risc0-proof.json", msg.Proof, 0644)
if err != nil {
return fmt.Errorf("failed to write proof to file: %s", err)
}
b16ProgramId := hex.EncodeToString(contract.ProgramId)
outBytes, err := exec.Command(risczeroVerifierPath, b16ProgramId, "/tmp/risc0-proof.json").Output()
if err != nil {
return fmt.Errorf("verifier failed. Exit code: %s", err)
}
// Then parse data from the verified proof.
var objmap zktx.HyleOutput
err = json.Unmarshal(outBytes, &objmap)
if err != nil {
return fmt.Errorf("failed to unmarshal verifier output: %s", err)
}
SetContextIfNeeded(objmap, hyleContext)
if err = ValidateProofData(objmap, contract.StateDigest, hyleContext); err != nil {
return err
}
finalStateDigest = objmap.NextState
} else if contract.Verifier == "sp1" {
// Save proof to a local file
err = os.WriteFile("/tmp/sp1-proof.json", msg.Proof, 0644)
if err != nil {
return fmt.Errorf("failed to write proof to file: %s", err)
}
b64ProgramId := base64.StdEncoding.EncodeToString(contract.ProgramId)
outBytes, err := exec.Command(sp1VerifierPath, b64ProgramId, "/tmp/sp1-proof.json").Output()
if err != nil {
return fmt.Errorf("verifier failed. Exit code: %s", err)
}
// Then parse data from the verified proof.
var objmap zktx.HyleOutput
err = json.Unmarshal(outBytes, &objmap)
if err != nil {
return fmt.Errorf("failed to unmarshal verifier output: %s", err)
}
SetContextIfNeeded(objmap, hyleContext)
if err = ValidateProofData(objmap, contract.StateDigest, hyleContext); err != nil {
return err
}
finalStateDigest = objmap.NextState
} else if contract.Verifier == "noir" {
// Save proof to a local file
err = os.WriteFile("/tmp/noir-proof.json", msg.Proof, 0644)
if err != nil {
return fmt.Errorf("failed to write proof to file: %s", err)
}
// Save vKey to a local file
f, err := os.Create("/tmp/noir-vkey.b64")
if err != nil {
return fmt.Errorf("failed to create vKey file: %s", err)
}
b64ProgramId := base64.StdEncoding.EncodeToString(contract.ProgramId)
_, err = f.WriteString(b64ProgramId)
if err != nil {
return fmt.Errorf("failed to write vKey to file: %s", err)
}
outBytes, err := exec.Command("bun", "run", noirVerifierPath+"/verifier.ts", "--vKeyPath", "/tmp/noir-vkey.b64", "--proofPath", "/tmp/noir-proof.json").Output()
if err != nil {
return fmt.Errorf("verifier failed. Exit code: %s", err)
}
// Then parse data from the verified proof.
var objmap zktx.HyleOutput
err = json.Unmarshal(outBytes, &objmap)
if err != nil {
return fmt.Errorf("failed to unmarshal verifier output: %s", err)
}
SetContextIfNeeded(objmap, hyleContext)
if err = ValidateProofData(objmap, contract.StateDigest, hyleContext); err != nil {
return err
}
finalStateDigest = objmap.NextState
} else if contract.Verifier == "gnark-groth16-te-BN254" {
// Order: first parse the proof, verify data, and then verify proof (assuming fastest failure in that order)
var proof gnark.Groth16Proof
if err := json.Unmarshal(msg.Proof, &proof); err != nil {
return fmt.Errorf("failed to unmarshal proof: %s", err)
}
if !bytes.Equal(proof.VerifyingKey, []byte(contract.ProgramId)) {
return fmt.Errorf("verifying key does not match the known VK")
}
g16p, vk, witness, err := proof.ParseProof()
if err != nil {
return err
}
data, err := proof.ExtractData(witness)
if err != nil {
return err
}
SetContextIfNeeded(*data, hyleContext)
if err = ValidateProofData(*data, contract.StateDigest, hyleContext); err != nil {
return err
}
finalStateDigest = data.NextState
// Final step: actually check the proof here
if err := groth16.Verify(g16p, vk, witness); err != nil {
return fmt.Errorf("groth16 verification failed: %w", err)
}
} else {
return fmt.Errorf("unknown verifier %s", contract.Verifier)
}
// Update the caller for future state changes
hyleContext.Caller = msg.ContractName
// TODO: check block time / number / TX Hash
// Update contract
contract.StateDigest = finalStateDigest
if err := ms.k.Contracts.Set(ctx, msg.ContractName, contract); err != nil {
return err
}
return nil
}
func (ms msgServer) VerifyProof(ctx context.Context, msg *zktx.MsgVerifyProof) (*zktx.MsgVerifyProofResponse, error) {
contract, err := ms.k.Contracts.Get(ctx, msg.ContractName)
if err != nil {
return nil, fmt.Errorf("invalid contract - no state is registered")
}
if contract.Verifier == "risczero" {
// Save proof to a local file
err = os.WriteFile("/tmp/risc0-proof.json", msg.Proof, 0644)
if err != nil {
return nil, fmt.Errorf("failed to write proof to file: %s", err)
}
b16ProgramId := hex.EncodeToString(contract.ProgramId)
_, err := exec.Command(risczeroVerifierPath, b16ProgramId, "/tmp/risc0-proof.json").Output()
if err != nil {
return nil, fmt.Errorf("verifier failed. Exit code: %s", err)
}
} else if contract.Verifier == "sp1" {
// Save proof to a local file
err = os.WriteFile("/tmp/sp1-proof.json", msg.Proof, 0644)
if err != nil {
return nil, fmt.Errorf("failed to write proof to file: %s", err)
}
b64ProgramId := base64.StdEncoding.EncodeToString(contract.ProgramId)
_, err := exec.Command(sp1VerifierPath, b64ProgramId, "/tmp/sp1-proof.json").Output()
if err != nil {
return nil, fmt.Errorf("verifier failed. Exit code: %s", err)
}
} else if contract.Verifier == "noir" {
// Save proof to a local file
err = os.WriteFile("/tmp/noir-proof.json", msg.Proof, 0644)
if err != nil {
return nil, fmt.Errorf("failed to write proof to file: %s", err)
}
// Save vKey to a local file
err = os.WriteFile("/tmp/noir-vkey.b64", contract.ProgramId, 0644)
if err != nil {
return nil, fmt.Errorf("failed to write vKey to file: %s", err)
}
_, err := exec.Command("bun", "run", noirVerifierPath, "--vKeyPath", "/tmp/noir-vkey.b64", "--proofPath", "/tmp/noir-proof.json").Output()
if err != nil {
return nil, fmt.Errorf("verifier failed. Exit code: %s", err)
}
} else if contract.Verifier == "gnark-groth16-te-BN254" {
var proof gnark.Groth16Proof
if err := json.Unmarshal(msg.Proof, &proof); err != nil {
return nil, fmt.Errorf("failed to unmarshal proof: %s", err)
}
if !bytes.Equal(proof.VerifyingKey, contract.ProgramId) {
return nil, fmt.Errorf("verifying key does not match the known VK")
}
g16p, vk, witness, err := proof.ParseProof()
if err != nil {
return nil, err
}
if err := groth16.Verify(g16p, vk, witness); err != nil {
return nil, fmt.Errorf("groth16 verification failed: %w", err)
}
} else {
return nil, fmt.Errorf("unknown verifier %s", contract.Verifier)
}
return &zktx.MsgVerifyProofResponse{}, nil
}
func (ms msgServer) RegisterContract(ctx context.Context, msg *zktx.MsgRegisterContract) (*zktx.MsgRegisterContractResponse, error) {
if exists, err := ms.k.Contracts.Has(ctx, msg.ContractName); err != nil || exists {
return nil, fmt.Errorf("Contract with name {%s} already exists", msg.ContractName)
}
newContract := zktx.Contract{
Verifier: msg.Verifier,
ProgramId: msg.ProgramId,
StateDigest: []byte(msg.StateDigest),
}
if err := ms.k.Contracts.Set(ctx, msg.ContractName, newContract); err != nil {
return nil, err
}
return &zktx.MsgRegisterContractResponse{}, nil
}
///// Stuff from the default go project in the cosmos sdk minichain
// UpdateParams params is defining the handler for the MsgUpdateParams message.
func (ms msgServer) UpdateParams(ctx context.Context, msg *zktx.MsgUpdateParams) (*zktx.MsgUpdateParamsResponse, error) {
if _, err := ms.k.addressCodec.StringToBytes(msg.Authority); err != nil {
return nil, fmt.Errorf("invalid authority address: %w", err)
}
if authority := ms.k.GetAuthority(); !strings.EqualFold(msg.Authority, authority) {
return nil, fmt.Errorf("unauthorized, authority does not match the module's authority: got %s, want %s", msg.Authority, authority)
}
if err := msg.Params.Validate(); err != nil {
return nil, err
}
if err := ms.k.Params.Set(ctx, msg.Params); err != nil {
return nil, err
}
return &zktx.MsgUpdateParamsResponse{}, nil
}