[Flow EVM] Investigate the wrong values returned by blockhash

[m-Peter]

This was reported in #6552 (comment)

cc @bluesign @j1010001 I have opened this separate issue, to investigate the wrong values being returned by blockhash in Solidity contracts.

[bluesign]

related code:

flow-go/fvm/evm/handler/blockHashList.go

Lines 78 to 100 in 22daf5c

	func (bhl *BlockHashList) Push(height uint64, bh gethCommon.Hash) error {
	// handle the very first block
	if bhl.IsEmpty() && height != 0 {
	return fmt.Errorf("out of the order block hash, expected: 0, got: %d", height)
	}
	// check the block heights before pushing
	if !bhl.IsEmpty() && height != bhl.height+1 {
	return fmt.Errorf("out of the order block hash, expected: %d, got: %d", bhl.height+1, height)
	}
	// updates the block hash stored at index
	err := bhl.updateBlockHashAt(bhl.tail, bh)
	if err != nil {
	return err
	}
	// update meta data
	bhl.tail = (bhl.tail + 1) % bhl.capacity
	bhl.height = height
	if bhl.count != bhl.capacity {
	bhl.count++
	}
	return bhl.storeMetaData()
	}

my investigation so far:

• Metadata is updating on mainnet, but buckets are not updating at all.