Unique Node List
唯一节点列表
Consensus Mechanisms
11 references
在 XRP 账本中，节点选择信任的验证器列表以达成共识。共识安全依赖于参与者的 UNL 之间的足够重叠。
出现在 11 个白皮书章节中
$XRP
XRP
Abstract
...t consensus does not require global trust. Each node in the network maintains a Unique Node List (UNL) — a set of other nodes that it trusts not to collude in an attempt to def...
Introduction
...ouples these concerns by using a different mechanism for Sybil resistance — the Unique Node List — and a separate iterative voting protocol for consensus. This decoupling allow...
Definition of Consensus
...r between servers because they have received different sets of transactions.
**Unique Node List (UNL).** The UNL of a server `s` is a set of other servers that `s` trusts not ...
Existing Consensus Algorithms
...ement on the set of validators. By replacing global trust with local trust (the UNL), RPCA achieves Sybil resistance without proof-of-work, while the iterative vot...
Ripple Protocol Consensus Algorithm
...roposal. The server signs this proposal and broadcasts it to all servers in its UNL. The initial proposal represents the server's starting position: the set of tra...
Formal Analysis of Convergence
...depends on two conditions: the fraction of Byzantine nodes within each server's UNL, and the degree of overlap between the UNLs of different servers. We provide fo...
Unique Node Lists
The Unique Node List (UNL) is the mechanism by which RPCA achieves Sybil resistance without proof-of...
Simulation Code
...imulator. The simulator models a network of servers, each maintaining their own UNL and participating in the full RPCA protocol including proposal generation, iter...
Discussion
...ms of hardware and electricity. In RPCA, security depends on the correctness of UNL selection, which is harder to quantify. If server operators make poor UNL choic...
Conclusion
...larger list for any pair of servers, and the fraction of Byzantine nodes in any UNL must remain below 20%. When these conditions are satisfied, the algorithm guara...
References
...providing formal analysis of its safety and liveness properties under specified UNL overlap and Byzantine fault conditions.
Mazieres, D. (2015). "The Stellar Cons...