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feat(vald): add support for manual signing of arbitrary data (#1966)
* feat(vald): add support for manual signing of arbitrary data
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| package vald | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/hex" | ||
| "fmt" | ||
|
|
||
| ec "github.com/btcsuite/btcd/btcec/v2/ecdsa" | ||
| "github.com/cosmos/cosmos-sdk/server" | ||
| sdk "github.com/cosmos/cosmos-sdk/types" | ||
| sdkerrors "github.com/cosmos/cosmos-sdk/types/errors" | ||
| "github.com/ethereum/go-ethereum/common" | ||
| "github.com/spf13/cobra" | ||
|
|
||
| "github.com/axelarnetwork/axelar-core/vald/config" | ||
| "github.com/axelarnetwork/axelar-core/vald/tss" | ||
| evm "github.com/axelarnetwork/axelar-core/x/evm/types" | ||
| multisig "github.com/axelarnetwork/axelar-core/x/multisig/exported" | ||
| "github.com/axelarnetwork/axelar-core/x/tss/tofnd" | ||
| "github.com/axelarnetwork/utils/funcs" | ||
| ) | ||
|
|
||
| // GetHealthCheckCommand returns the command to execute a node health check | ||
| func GetSignCommand() *cobra.Command { | ||
|
|
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| cmd := &cobra.Command{ | ||
| Use: "vald-sign [key-id] [public-key] [hash to sign]", | ||
| Short: "Sign hash with specified key", | ||
| Args: cobra.ExactArgs(3), | ||
| RunE: func(cmd *cobra.Command, args []string) error { | ||
|
|
||
| keyID := multisig.KeyID(args[0]) | ||
| if err := keyID.ValidateBasic(); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| pubKeyRaw, err := hex.DecodeString(args[1]) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| pubKey := multisig.PublicKey(pubKeyRaw) | ||
| if err := pubKey.ValidateBasic(); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| hashRaw, err := hex.DecodeString(args[2]) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if len(hashRaw) != common.HashLength { | ||
| return fmt.Errorf("hash to sign must be 32 bytes") | ||
| } | ||
|
|
||
| hash := common.BytesToHash(hashRaw) | ||
|
|
||
| valAddr, err := cmd.Flags().GetString("validator-addr") | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if _, err := sdk.ValAddressFromBech32(valAddr); valAddr != "" && err != nil { | ||
| return err | ||
| } | ||
|
|
||
| serverCtx := server.GetServerContextFromCmd(cmd) | ||
| valdCfg := config.DefaultValdConfig() | ||
| if err := serverCtx.Viper.Unmarshal(&valdCfg); err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| conn, err := tss.Connect(valdCfg.TssConfig.Host, valdCfg.TssConfig.Port, valdCfg.TssConfig.DialTimeout) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to reach tofnd: %s", err.Error()) | ||
| } | ||
|
|
||
| // creates client to communicate with the external tofnd process multisig service | ||
| client := tofnd.NewMultisigClient(conn) | ||
|
|
||
| grpcCtx, cancel := context.WithTimeout(cmd.Context(), timeout) | ||
| defer cancel() | ||
|
|
||
| res, err := client.Sign(grpcCtx, &tofnd.SignRequest{ | ||
| KeyUid: fmt.Sprintf("%s_%d", keyID, 0), | ||
| MsgToSign: hash.Bytes(), | ||
| PartyUid: valAddr, | ||
| PubKey: pubKey, | ||
| }) | ||
|
|
||
| if err != nil { | ||
| return sdkerrors.Wrapf(err, "failed signing") | ||
| } | ||
|
|
||
| switch res.GetSignResponse().(type) { | ||
| case *tofnd.SignResponse_Signature: | ||
| ecdsaSig := *funcs.Must(ec.ParseDERSignature(res.GetSignature())) | ||
| evmSignature := funcs.Must(evm.ToSignature(ecdsaSig, hash, pubKey.ToECDSAPubKey())).ToHomesteadSig() | ||
| fmt.Printf("signature: %s\n", hex.EncodeToString(evmSignature)) | ||
| return nil | ||
| case *tofnd.SignResponse_Error: | ||
| return fmt.Errorf(res.GetError()) | ||
| default: | ||
| panic(fmt.Errorf("unknown multisig sign response %T", res.GetSignResponse())) | ||
| } | ||
|
|
||
| }, | ||
| } | ||
|
|
||
| cmd.Flags().String("validator-addr", "", "the address of the validator operator, i.e axelarvaloper1..") | ||
|
|
||
| return cmd | ||
| } |