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    Home»Bitcoin»Bitcoin Layer 2: The Key To Scaling Bitcoin
    Bitcoin Layer 2: The Key To Scaling Bitcoin
    Bitcoin

    Bitcoin Layer 2: The Key To Scaling Bitcoin

    By Crypto EditorJune 4, 2025No Comments5 Mins Read
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    Bitcoin, and for that matter all blockchains, don’t scale. It’s a basic limitation of blockchain based mostly methods that they’re incapable of facilitating transactional use at a really world scale with out utterly sacrificing the decentralization and verifiability that make them beneficial within the first place. 

    This has been an existential concern that Bitcoiners have grappled with from the very starting of Bitcoin. It is a remark from James A. Donald, a Canadian cypherpunk who was the primary particular person to answer to Satoshi’s authentic submit on the cryptography mailing listing: 

    Satoshi Nakamoto wrote:

    “The bandwidth won’t be as prohibitive as you
    assume. A typical transaction can be about 400 bytes
    (ECC is properly compact). Every transaction must be
    broadcast twice, so shall we say 1KB per transaction.
    Visa processed 37 billion transactions in FY2008, or
    a median of 100 million transactions per day. That
    many transactions would take 100GB of bandwidth, or
    the dimensions of 12 DVD or 2 HD high quality motion pictures, or about
    $18 price of bandwidth at present costs.”

    The difficulty is, you’re evaluating with the Bankcard
    community.

    However a brand new foreign money can not compete straight with an outdated,
    as a result of community results favor the outdated.

    You must go the place Bankcard doesn’t go.

    At current, file sharing works by barter for bits. This,
    nevertheless requires the double coincidence of needs. Folks
    solely add information they’re downloading, and as soon as the
    obtain is full, cease seeding. So solely lively
    information, information that fairly lots of people need on the identical
    time, can be found.

    File sharing requires extraordinarily low-cost transactions,
    a number of transactions per second per shopper, day in and
    time out, with month-to-month transaction prices being very small
    per shopper, so to help file sharing on bitcoins, we
    will want a layer of account cash on high of the
    bitcoins, supporting transactions of 100
    thousandth the dimensions of the smallest coin, and to help
    anonymity, chaumian cash on high of the account cash.

    Allow us to name a bitcoin financial institution a bink. The bitcoins stand
    in the identical relation to account cash as gold stood in
    the times of the gold commonplace. The binks, not trusting
    one another to be liquid when liquidity is most wanted,
    settle out any web discrepancies with one another by
    transferring bit cash round as soon as each hundred thousand
    seconds or so, so bitcoins don’t change homeowners that
    usually, Most transactions cancel out on the account
    degree. The binks demand bitcoins of one another solely
    as a result of they don’t wish to maintain account cash for too
    lengthy. So a comparatively small quantity of bitcoins
    sometimes transacted can help a considerably bigger
    quantity of account cash ceaselessly transacted.

    Regardless of the period of the Blocksize Wars, the massive blockers, and the naive assumptions by many early Bitcoiners that merely elevating the blocksize was a viable resolution to scale the system, it has been understood by competent observers and engineers from the very starting that this could undermine the core worth proposition of that made it helpful within the first place. Hal Finney additionally spoke of the necessity for such a settlement layer on high. 

    Scaling in layers has all the time been the one rational plan to make Bitcoin work in the long run, however for a protracted interval of Bitcoin’s early historical past how to take action with out counting on trusted third events was an elusive drawback. 

    One of many first concepts on how to do that was sidechains, unbiased blockchains with a peg to facilitate locking bitcoin on the mainchain to make the most of on the sidechain, and at any level unlocking funds on the mainchain to maneuver them again by proving legit management of bitcoin on the sidechain. These methods nevertheless have but to attain a solution to function a peg with out both 1) introducing some type of trusted third celebration, irrespective of how nicely mitigated, or 2) creating centralization strain for the first Bitcoin community. 

    Since these early days there have been many extra concepts developed which have discovered higher methods to peg into second layer methods, particularly schemes just like the Lightning Community and Ark which permit finish customers to unilaterally exit again to the mainchain with no need the permission or approval of some operator. 

    Scaling Bitcoin in a method that facilitates greater transactional volumes with out degrading the safety properties of Bitcoin to the purpose of being indistinguishable from third celebration operated custodians is without doubt one of the most important issues to resolve to ensure that Bitcoin to really reach the long run. 

    This text collection will discover the architectures of various Layer 2 methods for Bitcoin, each these deployed reside on the community proper now and people which are merely design proposals at this level. 

    Listed beneath are the methods I will likely be masking. The design area of Layer 2s is far more expansive than many individuals are conversant in, so this listing shouldn’t be taken as complete and full, and will likely be up to date over time to replicate further Layer 2s which are coated. 

    • Ark
    • Statechains
    • Lightning Community
    • Sidechains
    • Clique
    • Rollups
    • Consumer Facet Validated Methods
    • Ecash
    • Custodial Methods
    • Bodily Bearer Devices



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