eth: add eth_blobBaseFee RPC (#29140)

eth/api_backend.go

@@ -353,6 +353,10 @@ func (b *EthApiBackend) FeeHistory(ctx context.Context, blockCount uint64, lastB
 	return b.gpo.FeeHistory(ctx, blockCount, lastBlock, rewardPercentiles)
 }
 
+func (b *EthApiBackend) BlobBaseFee(ctx context.Context) *big.Int {
+	return new(big.Int)
+}
+
 func (b *EthApiBackend) ChainDb() ethdb.Database {
 	return b.eth.ChainDb()
 }

internal/ethapi/api.go

@@ -138,6 +138,11 @@ func (s *PublicEthereumAPI) FeeHistory(ctx context.Context, blockCount hexutil.U
 	return results, nil
 }
 
+// BlobBaseFee returns the base fee for blob gas at the current head.
+func (s *PublicEthereumAPI) BlobBaseFee(ctx context.Context) *hexutil.Big {
+	return (*hexutil.Big)(new(big.Int))
+}
+
 // ProtocolVersion returns the current Ethereum protocol version this node supports
 func (s *PublicEthereumAPI) ProtocolVersion() hexutil.Uint {
 	return hexutil.Uint(s.b.ProtocolVersion())

internal/ethapi/backend.go

@@ -48,6 +48,7 @@ type Backend interface {
 	ProtocolVersion() int
 	SuggestGasTipCap(ctx context.Context) (*big.Int, error)
 	FeeHistory(ctx context.Context, blockCount uint64, lastBlock rpc.BlockNumber, rewardPercentiles []float64) (*big.Int, [][]*big.Int, []*big.Int, []float64, error)
+	BlobBaseFee(ctx context.Context) *big.Int
 	ChainDb() ethdb.Database
 	AccountManager() *accounts.Manager
 	RPCGasCap() uint64    // global gas cap for eth_call over rpc: DoS protection

internal/ethapi/transaction_args_test.go

@@ -291,6 +291,11 @@ func (b *backendMock) SyncProgress() ethereum.SyncProgress { return ethereum.Syn
 func (b *backendMock) FeeHistory(context.Context, uint64, rpc.BlockNumber, []float64) (*big.Int, [][]*big.Int, []*big.Int, []float64, error) {
 	return nil, nil, nil, nil, nil
 }
+
+func (b *backendMock) BlobBaseFee(ctx context.Context) *big.Int {
+	return new(big.Int)
+}
+
 func (b *backendMock) ChainDb() ethdb.Database           { return nil }
 func (b *backendMock) AccountManager() *accounts.Manager { return nil }
 func (b *backendMock) ExtRPCEnabled() bool               { return false }

internal/jsre/deps/web3.js

@@ -5586,6 +5586,11 @@ var properties = function () {
             getter: 'eth_gasPrice',
             outputFormatter: formatters.outputBigNumberFormatter
         }),
+        new Property({
+            name: 'blobBaseFee',
+            getter: 'eth_blobBaseFee',
+            outputFormatter: formatters.outputBigNumberFormatter
+        }),
         new Property({
             name: 'accounts',
             getter: 'eth_accounts'

les/api_backend.go

@@ -286,6 +286,10 @@ func (b *LesApiBackend) FeeHistory(ctx context.Context, blockCount uint64, lastB
 	return b.gpo.FeeHistory(ctx, blockCount, lastBlock, rewardPercentiles)
 }
 
+func (b *LesApiBackend) BlobBaseFee(ctx context.Context) *big.Int {
+	return new(big.Int)
+}
+
 func (b *LesApiBackend) ChainDb() ethdb.Database {
 	return b.eth.chainDb
 }