+function pageToStartAndCount (page: number, itemsPerPage: number) {
+ const start = (page - 1) * itemsPerPage
+
+ return { start, count: itemsPerPage }
+}
+
+// ---------------------------------------------------------------------------
+
+type SemVersion = { major: number, minor: number, patch: number }
+function parseSemVersion (s: string) {
+ const parsed = s.match(/^v?(\d+)\.(\d+)\.(\d+)$/i)
+
+ return {
+ major: parseInt(parsed[1]),
+ minor: parseInt(parsed[2]),
+ patch: parseInt(parsed[3])
+ } as SemVersion
+}
+
+// ---------------------------------------------------------------------------
+
+function sha256 (str: string | Buffer, encoding: BinaryToTextEncoding = 'hex') {