What is an uncle/ommer block?

  • The Ethereum blockchain is described as containing "ommer" blocks, usually called "uncle" blocks by the general public. What is an ommer/uncle block, and why are they needed?

    The term "ommer" is a gender-neutral alternative to aunt / uncle. See http://nonbinary.org/wiki/Gender_neutral_language#Aunt.2FUncle

  • linagee

    linagee Correct answer

    5 years ago

    From the glossary

    Uncle: a child of a parent of a parent of a block that is not the parent, or more generally a child of an ancestor that is not an ancestor. If A is an uncle of B, B is a nephew of A.

    Why they are needed?

    To help reward miners for when duplicate block solutions are found because of the shorter block times of Ethereum (compared to other cryptocurrency). An uncle is a smaller reward than a full block. (And if they are submitted later than the next block, the reward rapidly diminishes, ending at zero after seven blocks later.)

    OMG...That sounds like a crazy definition. why can't we say uncle = sibling of the parent?

    @user1870400 given that it's not simply a sibling of the parent but up to 6 generations before, it's probably best to have a more technical-seeming term like "ommer" that makes people ask what the exact definition is

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Content dated before 7/24/2021 11:53 AM