Estimate FeeCap 20 blocks in the future

Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
2020-08-07 00:10:55 +02:00
parent 07bf155295
commit e1de0e3408
4 changed files with 33 additions and 9 deletions
@@ -2,6 +2,7 @@ package full

 import (
 	"context"
+	"math"
 	"sort"

 	"github.com/filecoin-project/lotus/build"
@@ -26,9 +27,23 @@ type GasAPI struct {
 }

 const MinGasPrice = 1
+const BaseFeeEstimNBlocks = 20
+
+func (a *GasAPI) GasEstimateFeeCap(ctx context.Context, maxqueueblks int64,
+	tsk types.TipSetKey) (types.BigInt, error) {
+	ts := a.Chain.GetHeaviestTipSet()
+
+	parentBaseFee := ts.Blocks()[0].ParentBaseFee
+	increaseFactor := math.Pow(1+1/build.BaseFeeMaxChangeDenom, BaseFeeEstimNBlocks)
+
+	out := types.BigMul(parentBaseFee, types.NewInt(uint64(increaseFactor*(1<<8))))
+	out = types.BigDiv(parentBaseFee, types.NewInt(1<<8))
+
+	return out, nil
+}

 func (a *GasAPI) GasEsitmateGasPremium(ctx context.Context, nblocksincl uint64,
-	sender address.Address, gaslimit int64, tsk types.TipSetKey) (types.BigInt, error) {
+	sender address.Address, gaslimit int64, _ types.TipSetKey) (types.BigInt, error) {

 	if nblocksincl == 0 {
 		nblocksincl = 1