The Settlement Layer is the stratum that achieves final, irreversible transfer of value or state between parties. In layered ledger systems it sits beneath faster execution and netting strata and above the Consensus Layer that secures finality. It contains the records, accounts, and finality conditions under which obligations are discharged.
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- The Settlement Layer is where transfers become final and can no longer be reversed or contested. Typical members include the canonical ledger of balances, finality rules, netting and clearing records, and the conditions under which a transfer is deemed settled. It provides the authoritative record of who holds what.
- It requires the Consensus Layer to guarantee that the settled ledger is agreed and tamper-resistant. It enables higher-throughput constructs such as the Lightning Network Layer and Smart Contract Layer, which assume an eventual settlement guarantee beneath them.
- The layer bridges to atomic settlement and to the double-spending problem it must prevent. Finality time and assurance defined here determine how quickly value can be considered safely transferred at every layer above.