add support for all hash field expiration commands (#2787)

packages/client/lib/commands/HEXPIREAT.ts

@@ -0,0 +1,28 @@
+import { RedisCommandArgument } from '.';
+import { pushVerdictArgument, transformEXAT } from './generic-transformers';
+import { HashExpiration } from './HEXPIRE';
+
+export const FIRST_KEY_INDEX = 1;
+
+export function transformArguments(
+  key: RedisCommandArgument,
+  fields: RedisCommandArgument | Array<RedisCommandArgument>,
+  timestamp: number | Date,
+  mode?: 'NX' | 'XX' | 'GT' | 'LT'
+) {
+  const args = [
+    'HEXPIREAT',
+    key,
+    transformEXAT(timestamp)
+  ];
+
+  if (mode) {
+    args.push(mode);
+  }
+
+  args.push('FIELDS')
+
+  return pushVerdictArgument(args, fields);
+}
+
+export declare function transformReply(): Array<HashExpiration>;