internal/ethapi: make EstimateGas use `latest` block by default (#24363)

* EstimateGas should use LatestBlockNumber by default

* graphql: default to use latest for gas estimation

---------
Co-authored-by: Martin Holst Swende <martin@swende.se>

graphql/graphql.go

@@ -1150,8 +1150,8 @@ func (p *Pending) Call(ctx context.Context, args struct {
 func (p *Pending) EstimateGas(ctx context.Context, args struct {
 	Data ethapi.TransactionArgs
 }) (hexutil.Uint64, error) {
-	pendingBlockNr := rpc.BlockNumberOrHashWithNumber(rpc.PendingBlockNumber)
-	return ethapi.DoEstimateGas(ctx, p.r.backend, args.Data, pendingBlockNr, p.r.backend.RPCGasCap())
+	latestBlockNr := rpc.BlockNumberOrHashWithNumber(rpc.LatestBlockNumber)
+	return ethapi.DoEstimateGas(ctx, p.r.backend, args.Data, latestBlockNr, p.r.backend.RPCGasCap())
 }
 
 // Resolver is the top-level object in the GraphQL hierarchy.

internal/ethapi/api.go

@@ -1217,7 +1217,7 @@ func DoEstimateGas(ctx context.Context, b Backend, args TransactionArgs, blockNr
 // EstimateGas returns an estimate of the amount of gas needed to execute the
 // given transaction against the current pending block.
 func (s *BlockChainAPI) EstimateGas(ctx context.Context, args TransactionArgs, blockNrOrHash *rpc.BlockNumberOrHash) (hexutil.Uint64, error) {
-	bNrOrHash := rpc.BlockNumberOrHashWithNumber(rpc.PendingBlockNumber)
+	bNrOrHash := rpc.BlockNumberOrHashWithNumber(rpc.LatestBlockNumber)
 	if blockNrOrHash != nil {
 		bNrOrHash = *blockNrOrHash
 	}