consensus/misc: eip-4844 comment

consensus/misc/eip4844/eip4844.go

@@ -33,8 +33,11 @@ var (
 // VerifyEIP4844Header verifies the presence of the excessBlobGas field and that
 // if the current block contains no transactions, the excessBlobGas is updated
 // accordingly.
+// VerifyEIP4844Header는 excessBlobGas, BlobGasUsed 필드의 존재 등을 검증하고,
+// 현재 블록이 트랜잭션을 담고 있지 않으면, 그에따라 excessBlobGas가 업데이트한다.
 func VerifyEIP4844Header(parent, header *types.Header) error {
 	// Verify the header is not malformed
+	// 헤더의 형식 검증
 	if header.ExcessBlobGas == nil {
 		return errors.New("header is missing excessBlobGas")
 	}
@@ -42,6 +45,7 @@ func VerifyEIP4844Header(parent, header *types.Header) error {
 		return errors.New("header is missing blobGasUsed")
 	}
 	// Verify that the blob gas used remains within reasonable limits.
+	// 사용된 blob gas가 합리적인 한도 내에 있는지 검증한다.
 	if *header.BlobGasUsed > params.MaxBlobGasPerBlock {
 		return fmt.Errorf("blob gas used %d exceeds maximum allowance %d", *header.BlobGasUsed, params.MaxBlobGasPerBlock)
 	}
@@ -49,6 +53,7 @@ func VerifyEIP4844Header(parent, header *types.Header) error {
 		return fmt.Errorf("blob gas used %d not a multiple of blob gas per blob %d", header.BlobGasUsed, params.BlobTxBlobGasPerBlob)
 	}
 	// Verify the excessBlobGas is correct based on the parent header
+	// excessBlobGas가 parent header를 기준으로 올바른지 확인한다.
 	var (
 		parentExcessBlobGas uint64
 		parentBlobGasUsed   uint64
@@ -67,25 +72,32 @@ func VerifyEIP4844Header(parent, header *types.Header) error {
 
 // CalcExcessBlobGas calculates the excess blob gas after applying the set of
 // blobs on top of the excess blob gas.
+// CalcExcessBlobGas는 excess blob gas위에 blob set을 적용한 이후, excess blob gas를 계산한다.
 func CalcExcessBlobGas(parentExcessBlobGas uint64, parentBlobGasUsed uint64) uint64 {
 	excessBlobGas := parentExcessBlobGas + parentBlobGasUsed
+	// 목표치 이하로 사용했으므로 excess blob gas = 0
 	if excessBlobGas < params.BlobTxTargetBlobGasPerBlock {
 		return 0
 	}
+	// excessBlobGas = (parentExcessBlobGas + parentBlobGasUsed) - BlobTxTargetBlobGasPerBlock
 	return excessBlobGas - params.BlobTxTargetBlobGasPerBlock
 }
 
 // CalcBlobFee calculates the blobfee from the header's excess blob gas field.
+// CalcBlobFee는 header의 excess blob gase field로 blobfee를 계산한다.
 func CalcBlobFee(excessBlobGas uint64) *big.Int {
 	return fakeExponential(minBlobGasPrice, new(big.Int).SetUint64(excessBlobGas), blobGaspriceUpdateFraction)
 }
 
 // fakeExponential approximates factor * e ** (numerator / denominator) using
 // Taylor expansion.
+// 테일러 급수 전개로 근사적으로 계산
+// e^x = 1 + x + x^2/2! + x^3/3! + ...
 func fakeExponential(factor, numerator, denominator *big.Int) *big.Int {
 	var (
 		output = new(big.Int)
 		accum  = new(big.Int).Mul(factor, denominator)
+		// ------ accoum = new(big.Int).Set(factor)
 	)
 	for i := 1; accum.Sign() > 0; i++ {
 		output.Add(output, accum)
@@ -95,4 +107,9 @@ func fakeExponential(factor, numerator, denominator *big.Int) *big.Int {
 		accum.Div(accum, big.NewInt(int64(i)))
 	}
 	return output.Div(output, denominator)
+	// ------ return output
+	// 왜 굳이 마지막에 output을 denominator로 나누는거지?
+	// 내 생각엔 함수의 시작에서 accum을 정의할때 factor와 denominator의 곱을 저장하기 때문에
+	// denominator로 나누어준 거 같은데 그냥 처음부터 accum을 factor로 정의해서
+	// denominator를 곱하고 나누는 연산과정을 생략할 수 있지 않나?
 }

core/types/block.go

@@ -86,9 +86,11 @@ type Header struct {
 	WithdrawalsHash *common.Hash `json:"withdrawalsRoot" rlp:"optional"`
 
 	// BlobGasUsed was added by EIP-4844 and is ignored in legacy headers.
+	// BlobGasUsed는 EIP-4844에 추가되고, legacy headers에서는 무시된다.
 	BlobGasUsed *uint64 `json:"blobGasUsed" rlp:"optional"`
 
 	// ExcessBlobGas was added by EIP-4844 and is ignored in legacy headers.
+	// ExcessBlobGas는 EIP-4844에 추가되고, legacy headers에서는 무시된다.
 	ExcessBlobGas *uint64 `json:"excessBlobGas" rlp:"optional"`
 
 	// ParentBeaconRoot was added by EIP-4788 and is ignored in legacy headers.

params/protocol_params.go

@@ -169,12 +169,21 @@ const (
 	BlobTxBytesPerFieldElement = 32      // Size in bytes of a field element
 	BlobTxFieldElementsPerBlob = 4096    // Number of field elements stored in a single data blob
 	BlobTxBlobGasPerBlob       = 1 << 17 // Gas consumption of a single data blob (== blob byte size)
+	// 한 data blob당 가스 소모량(blob의 byte size)
+
 	BlobTxMinBlobGasprice = 1 // Minimum gas price for data blobs
+	// data blobs의 최소 gas price
+
 	BlobTxBlobGaspriceUpdateFraction = 3338477 // Controls the maximum rate of change for blob gas price
+	// blob gas price의 최대 변동 폭 제어
+
 	BlobTxPointEvaluationPrecompileGas = 50000 // Gas price for the point evaluation precompile.
 
 	BlobTxTargetBlobGasPerBlock = 3 * BlobTxBlobGasPerBlob // Target consumable blob gas for data blobs per block (for 1559-like pricing)
+	// 블록당 data blobs에 소비될 수 있는 목표 blob gas
+
 	MaxBlobGasPerBlock = 6 * BlobTxBlobGasPerBlob // Maximum consumable blob gas for data blobs per block
+	// 블록당 data blobs에 소비될 수 있는 최대 blob gas
 )
 
 // Gas discount table for BLS12-381 G1 and G2 multi exponentiation operations