获取存储的u64的默认值

Question

我想获取存储值，如果不存在，请给我0

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

但是编译器抛出

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

您必须以一种永远不允许lastDeposit为null的方式来表述这一点

这是为我编译的，但有错误

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