Finality
Consensus Mechanisms
13 references
The point at which a transaction or block is considered irreversible within the protocol's security assumptions. Some systems provide probabilistic finality; others provide deterministic finality.
Appears in 13 whitepaper sections
$USDT
Tether
Technology Stack
...re recorded directly in Bitcoin blocks and benefit from Bitcoin's consensus and finality guarantees, while remaining transparent and parseable by any software that unde...
Process of Tethering
...ndard Omni Layer transactions on the Bitcoin blockchain, settling with the same finality guarantees as Bitcoin transactions themselves -- typically one confirmation wit...
$XRP
XRP
Abstract
...ms that require massive computational expenditure and suffer from probabilistic finality that may take an hour to become practically irreversible, RPCA provides determi...
Existing Consensus Algorithms
... larger blocks favor miners with more bandwidth and storage.
- **Probabilistic finality.** Even after multiple confirmations, a proof-of-work transaction is never abso...
Conclusion
...complete in bounded time (liveness). These guarantees provide the deterministic finality required for financial settlement — unlike proof-of-work systems where finality...
References
...parties. Established the longest-chain rule and demonstrated that probabilistic finality increases exponentially with the number of confirmations.
Lamport, L. (1998). ...
$SOL
Solana
Abstract
...in a Byzantine Fault Tolerant replicated state machine, resulting in sub-second finality times.
The key innovation is the construction of a verifiable delay function i...
Outline
...erting a confirmed block increases exponentially over time, providing practical finality within seconds.
The paper proceeds to describe Streaming Proof of Replication,...
Proof of Stake Consensus
... Effectively permanent (decades)
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This lockout mechanism creates a natural finality gradient. A block that has received votes from validators representing a superm...
Conclusion
... produces a system with several distinctive properties. Tower BFT provides fast finality through exponentially increasing lockouts anchored to verifiable PoH timestamps...
$USDC
USD Coin
Design Principles
...different applications have different requirements for transaction speed, cost, finality, and programmability. Rather than committing exclusively to a single blockchain...
Technology
...and implementation uses Algorand Standard Assets (ASA), providing deterministic finality within seconds. Implementations on Stellar, Avalanche, Tron, Polygon, and other...
Token Lifecycle
...klist function is exercised for compliance purposes). Transfers settle with the finality characteristics of the underlying blockchain -- seconds on Solana, minutes on E...
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