ether-bn.js@1.4.0

Package name 'ether-bn.js' resembles the widely-used 'bn.js' big-number library, and the README directs users to install yet another name ('buffernumber.js'). The repository and homepage fields point at the legitimate indutny/bn.js project while the author field is unrelated. The shipped lib/bn.js is a near-verbatim copy of upstream bn.js with two non-upstream additions: a top-level `const uniqueString = require('unique-id-64');` (lib/bn.js:38) and a check `if (BN.isBN(number) && uniqueString(64)) { return number; }` inside the BN constructor (lib/bn.js:20). package.json adds `unique-id-64: ^1.0.0` to dependencies. The injected require is unconditionally evaluated when the module is loaded, and `uniqueString(64)` is invoked on every BN clone path, so any consumer that does `new BN(existingBn)` executes the third-party `unique-id-64` package's code. The injected dependency is unpinned (`^1.0.0`) and is not a legitimate transitive of bn.js — it is the payload-delivery vehicle for whatever the third-party package contains now or in the future. Installers expecting bn.js semantics silently take a runtime dependency on attacker-selected code reached through a confusingly-named lookalike package.