chore(updater): Allow setting setRandomness gas limit via env var

Author: oyyblin

updater/Makefile

@@ -28,6 +28,7 @@ local-run-anvil:
 	export DRAND_ORACLE_ADDRESS=$(ANVIL_DRAND_ORACLE_ADDRESS) && \
 	export RPC=$(ANVIL_RPC) && \
 	export CHAIN_ID=$(ANVIL_CHAIN_ID) && \
+	export SET_RANDOMNESS_GAS_LIMIT=500000 && \
 	export SIGNER_PRIVATE_KEY=$(ANVIL_SIGNER_PRIVATE_KEY) && \
 	export SENDER_PRIVATE_KEY=$(ANVIL_SENDER_PRIVATE_KEY) && \
 	export GENESIS_ROUND=$(ANVIL_GENESIS_ROUND) && \

updater/README.md

@@ -27,6 +27,7 @@ The updater requires the following environment variables:
 - `DRAND_ORACLE_ADDRESS`: The address of the Drand Oracle contract.
 - `RPC`: The RPC URL.
 - `CHAIN_ID`: The chain ID.
+- `SET_RANDOMNESS_GAS_LIMIT`: The gas limit for the setRandomness transaction.
 - `SIGNER_PRIVATE_KEY`: The private key of the signer.
 - `SENDER_PRIVATE_KEY`: The private key of the sender.
 - `GENESIS_ROUND`: The genesis round.

updater/cmd/main.go

@@ -83,7 +83,7 @@ func main() {
 
 	// Initialize updater service
 	log.Info().Msg("Initializing updater service...")
-	updater, err := service.NewUpdater(drandClient, rpcClient, binding, cfg.GenesisRound, signer, sender)
+	updater, err := service.NewUpdater(drandClient, rpcClient, cfg.SetRandomnessGasLimit, binding, cfg.GenesisRound, signer, sender)
 	if err != nil {
 		log.Fatal().Err(err).Msg("error creating updater")
 	}

updater/config/config.go

@@ -1,12 +1,13 @@
 package config
 
 type Config struct {
-	DrandURLs          []string `envconfig:"DRAND_URLS" required:"true"`
-	ChainHash          string   `envconfig:"CHAIN_HASH" required:"true"`
-	DrandOracleAddress string   `envconfig:"DRAND_ORACLE_ADDRESS" required:"true"`
-	RPC                string   `envconfig:"RPC" required:"true"`
-	ChainID            int64    `envconfig:"CHAIN_ID" required:"true"`
-	SignerPrivateKey   string   `envconfig:"SIGNER_PRIVATE_KEY" required:"true"`
-	SenderPrivateKey   string   `envconfig:"SENDER_PRIVATE_KEY" required:"true"`
-	GenesisRound       uint64   `envconfig:"GENESIS_ROUND" required:"true"`
+	DrandURLs             []string `envconfig:"DRAND_URLS" required:"true"`
+	ChainHash             string   `envconfig:"CHAIN_HASH" required:"true"`
+	DrandOracleAddress    string   `envconfig:"DRAND_ORACLE_ADDRESS" required:"true"`
+	RPC                   string   `envconfig:"RPC" required:"true"`
+	ChainID               int64    `envconfig:"CHAIN_ID" required:"true"`
+	SetRandomnessGasLimit uint64   `envconfig:"SET_RANDOMNESS_GAS_LIMIT" required:"true"`
+	SignerPrivateKey      string   `envconfig:"SIGNER_PRIVATE_KEY" required:"true"`
+	SenderPrivateKey      string   `envconfig:"SENDER_PRIVATE_KEY" required:"true"`
+	GenesisRound          uint64   `envconfig:"GENESIS_ROUND" required:"true"`
 }

updater/internal/service/updater.go

@@ -21,10 +21,6 @@ import (
 	"golang.org/x/sync/errgroup"
 )
 
-const (
-	setRandomnessGasLimit = 500000 // 500,000 should be more than enough for a setRandomness transaction
-)
-
 type Updater struct {
 	// drandClient is the Drand HTTP client
 	drandClient client.Client
@@ -35,6 +31,9 @@ type Updater struct {
 	// rpcClient is the Ethereum RPC client
 	rpcClient *ethclient.Client
 
+	// setRandomnessGasLimit is the gas limit for the setRandomness transaction
+	setRandomnessGasLimit uint64
+
 	// binding is the Drand Oracle contract binding
 	binding *binding.Binding
 
@@ -68,21 +67,23 @@ type roundData struct {
 func NewUpdater(
 	drandClient client.Client,
 	rpcClient *ethclient.Client,
+	setRandomnessGasLimit uint64,
 	binding *binding.Binding,
 	genesisRound uint64,
 	signer *signer.Signer,
 	sender *sender.Sender,
 ) (*Updater, error) {
 	return &Updater{
-		drandClient:       drandClient,
-		rpcClient:         rpcClient,
-		binding:           binding,
-		genesisRound:      genesisRound,
-		roundChan:         make(chan *roundData, 1),
-		latestOracleRound: 0,
-		latestDrandRound:  0,
-		signer:            signer,
-		sender:            sender,
+		drandClient:           drandClient,
+		rpcClient:             rpcClient,
+		setRandomnessGasLimit: setRandomnessGasLimit,
+		binding:               binding,
+		genesisRound:          genesisRound,
+		roundChan:             make(chan *roundData, 1),
+		latestOracleRound:     0,
+		latestDrandRound:      0,
+		signer:                signer,
+		sender:                sender,
 	}, nil
 }
 
@@ -254,7 +255,7 @@ func (u *Updater) processRound(
 		&bind.TransactOpts{
 			From:     u.sender.Address(),
 			Signer:   u.sender.SignerFn(),
-			GasLimit: setRandomnessGasLimit,
+			GasLimit: u.setRandomnessGasLimit,
 			GasPrice: gasPrice,
 		},
 		binding.IDrandOracleRandom{