From: Chris Duncan <chris@zoso.dev>
Date: Mon, 4 Aug 2025 13:57:32 +0000 (-0700)
Subject: Type check entropy and checksum concatenation. Ensure mnemonic phrase is lowercase... 
X-Git-Tag: v0.10.5~46^2~18
X-Git-Url: https://git.codecow.com/?a=commitdiff_plain;h=c96a2e4089ea5084901febbe86b185f5d4fe9ac4;p=libnemo.git

Type check entropy and checksum concatenation. Ensure mnemonic phrase is lowercase when imported.
---

diff --git a/src/lib/bip39-mnemonic.ts b/src/lib/bip39-mnemonic.ts
index 1305a39..d3fc409 100644
--- a/src/lib/bip39-mnemonic.ts
+++ b/src/lib/bip39-mnemonic.ts
@@ -48,7 +48,7 @@ export class Bip39Mnemonic {
 			e = e << 8n | BigInt(entropy[i])
 		}
 
-		let concatenation = (e << BigInt(entropy.byteLength) / 4n) | checksum
+		let concatenation: bigint = (e << BigInt(entropy.byteLength) / 4n) | checksum
 		const words: string[] = []
 		for (let i = 0; i < phraseLength; i++) {
 			const wordBits = concatenation & 2047n
@@ -74,7 +74,7 @@ export class Bip39Mnemonic {
 		const self = new this()
 		const isValid = await this.validate(phrase)
 		if (isValid) {
-			self.#phrase = phrase.normalize('NFKD').split(' ')
+			self.#phrase = phrase.normalize('NFKD').toLowerCase().split(' ')
 			return self
 		} else {
 			throw new Error('Invalid mnemonic phrase.')