Suggest filter range for oversized getLogs request

[wanliqun]

This change is 

[boqiu]

Reviewed 9 of 9 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @wanliqun)

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rpc/handler/cfx_logs.go line 110 at r1 (raw file):

		if blkRange, valid := calculateCfxBlockRange(fnFilter); valid {
			numBlocks := int64(blkRange.To - blkRange.From + 1)

Is it possible that blkRange.To < bklRange.From?

[wanliqun]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @boqiu)

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rpc/handler/cfx_logs.go line 110 at r1 (raw file):

Previously, boqiu (Bo QIU) wrote…

Is it possible that blkRange.To < bklRange.From?

We actually had a check for that in calculateCfxBlockRange, where the returned boolean variable to indicate whether the block range is valid or not would be false in that case.

[boqiu]

Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @wanliqun)