6eacfe1975
Expand the output buffer from 4 bytes to 32 bytes and iterate all 32 positions, so values ≥ 2³² are encoded correctly instead of silently dropped. Update tests to assert 32-byte output and add coverage for 2³², 2¹²⁸, and max uint256 roundtrips. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
17 lines
440 B
TypeScript
17 lines
440 B
TypeScript
export function bytesToUint256LittleEndian(bytes: Uint8Array): bigint {
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let value: bigint = 0n;
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for (let i = bytes.length - 1; i >= 0; i--) {
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value = (value << 8n) | BigInt(bytes[i]);
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}
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return value;
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}
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export function uint256ToBytesLittleEndian(value: bigint): Uint8Array {
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const bytes = new Uint8Array(32);
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for (let i = 0; i < 32; i++) {
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bytes[i] = Number((value >> (8n * BigInt(i))) & 0xffn);
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}
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return bytes;
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}
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