获取存储u64上的默认值

Question

我想获得存储值，如果它不存在，请给我0

const lastDeposit = storage.get<u64>('lastDeposit', u64(0)) || u64(0);

但编译器把

ERROR AS204: Type 'u64' cannot be nullable.
static get<T>(key: string, defaultValue: T | null = null): T | null {
~
in ~lib/near-sdk-core/storage.ts(178,44)
ERROR AS204: Type 'u64' cannot be nullable.
static get<T>(key: string, defaultValue: T | null = null): T | null {
~
in ~lib/near-sdk-core/storage.ts(178,62)

Answer 1

你必须以某种方式表达lastDeposit永远不允许是null

这是为我编译的错误

const lastDeposit: u64 = storage.getSome<u64>('lastDeposit') || 0;