Config validation

chains/tendermint/config.go

@@ -1,7 +1,9 @@
 package tendermint
 
 import (
+	"errors"
 	"fmt"
+	"strings"
 
 	"github.com/hyperledger-labs/yui-relayer/core"
 )
@@ -14,6 +16,41 @@ func (c ChainConfig) Build() (core.Chain, error) {
 	}, nil
 }
 
+func (c ChainConfig) Validate() error {
+	isEmpty := func(s string) bool {
+		return strings.TrimSpace(s) == ""
+	}
+
+	var errs []error
+	if isEmpty(c.Key) {
+		errs = append(errs, fmt.Errorf("config attribute \"key\" is empty"))
+	}
+	if isEmpty(c.ChainId) {
+		errs = append(errs, fmt.Errorf("config attribute \"chain_id\" is empty"))
+	}
+	if isEmpty(c.RpcAddr) {
+		errs = append(errs, fmt.Errorf("config attribute \"rpc_addr\" is empty"))
+	}
+	if isEmpty(c.AccountPrefix) {
+		errs = append(errs, fmt.Errorf("config attribute \"account_prefix\" is empty"))
+	}
+	if c.GasAdjustment <= 0 {
+		errs = append(errs, fmt.Errorf("config attribute \"gas_adjustment\" is too small: %v", c.GasAdjustment))
+	}
+	if isEmpty(c.GasPrices) {
+		errs = append(errs, fmt.Errorf("config attribute \"gas_prices\" is empty"))
+	}
+	if c.AverageBlockTimeMsec == 0 {
+		errs = append(errs, fmt.Errorf("config attribute \"average_block_time_msec\" is zero"))
+	}
+	if c.MaxRetryForCommit == 0 {
+		errs = append(errs, fmt.Errorf("config attribute \"max_retry_for_commit\" is zero"))
+	}
+
+	// errors.Join returns nil if len(errs) == 0
+	return errors.Join(errs...)
+}
+
 var _ core.ProverConfig = (*ProverConfig)(nil)
 
 func (c ProverConfig) Build(chain core.Chain) (core.Prover, error) {
@@ -23,3 +60,13 @@ func (c ProverConfig) Build(chain core.Chain) (core.Prover, error) {
 	}
 	return NewProver(chain_, c), nil
 }
+
+func (c ProverConfig) Validate() error {
+	isEmpty := func(s string) bool {
+		return strings.TrimSpace(s) == ""
+	}
+	if isEmpty(c.TrustingPeriod) {
+		return fmt.Errorf("config attribute \"trusting_period\" is empty")
+	}
+	return nil
+}

core/config.go

@@ -3,6 +3,7 @@ package core
 import (
 	"encoding/json"
 	"errors"
+	"fmt"
 
 	"github.com/cosmos/cosmos-sdk/codec"
 	"github.com/cosmos/gogoproto/proto"
@@ -24,12 +25,14 @@ type ChainProverConfig struct {
 type ChainConfig interface {
 	proto.Message
 	Build() (Chain, error)
+	Validate() error
 }
 
 // ProverConfig defines a prover configuration and its builder
 type ProverConfig interface {
 	proto.Message
 	Build(Chain) (Prover, error)
+	Validate() error
 }
 
 // NewChainProverConfig returns a new config instance
@@ -58,10 +61,14 @@ func (cc *ChainProverConfig) Init(m codec.Codec) error {
 	var chain ChainConfig
 	if err := utils.UnmarshalJSONAny(m, &chain, cc.Chain); err != nil {
 		return err
+	} else if err := chain.Validate(); err != nil {
+		return fmt.Errorf("invalid chain config: %v", err)
 	}
 	var prover ProverConfig
 	if err := utils.UnmarshalJSONAny(m, &prover, cc.Prover); err != nil {
 		return err
+	} else if err := prover.Validate(); err != nil {
+		return fmt.Errorf("invalid prover config: %v", err)
 	}
 	cc.chain = chain
 	cc.prover = prover

proto/relayer/provers/mock/config/config.proto

@@ -7,5 +7,5 @@ option go_package = "github.com/hyperledger-labs/yui-relayer/provers/mock";
 option (gogoproto.goproto_getters_all) = false;
 
 message ProverConfig {
-  int64 finality_delay = 1;
+  uint64 finality_delay = 1;
 }

provers/mock/config.go

@@ -9,3 +9,7 @@ var _ core.ProverConfig = (*ProverConfig)(nil)
 func (c ProverConfig) Build(chain core.Chain) (core.Prover, error) {
 	return NewProver(chain, c), nil
 }
+
+func (c ProverConfig) Validate() error {
+	return nil
+}

provers/mock/prover.go

@@ -64,7 +64,7 @@ func (pr *Prover) GetLatestFinalizedHeader() (latestFinalizedHeader core.Header,
 	if err != nil {
 		return nil, err
 	}
-	for i := int64(0); i < pr.config.FinalityDelay; i++ {
+	for i := uint64(0); i < pr.config.FinalityDelay; i++ {
 		if prevHeight, success := chainLatestHeight.Decrement(); success {
 			chainLatestHeight = prevHeight
 		} else {