Function L1BlockRefByLabel

ethstorage/eth/heads.go:93–105

L1BlockRefByLabel returns the [eth.L1BlockRef] for the given block label. Notice, we cannot cache a block reference by label because labels are not guaranteed to be unique.

(src *PollingClient, ctx context.Context, label rpc.BlockNumber)

// L1BlockRefByLabel returns the [eth.L1BlockRef] for the given block label.
// Notice, we cannot cache a block reference by label because labels are not guaranteed to be unique.
func L1BlockRefByLabel(src *PollingClient, ctx context.Context, label rpc.BlockNumber) (L1BlockRef, error) {
	head, err := src.HeaderByNumber(ctx, big.NewInt(label.Int64()))
	if err != nil {
		// Both geth and erigon like to serve non-standard errors for the safe and finalized heads, correct that.
		// This happens when the chain just started and nothing is marked as safe/finalized yet.
		if strings.Contains(err.Error(), "block not found") || strings.Contains(err.Error(), "Unknown block") {
			err = ethereum.NotFound
		}
		return L1BlockRef{}, fmt.Errorf("failed to fetch head header: %w", err)
	}
	ref := InfoToL1BlockRef(head)
	return ref, nil
}