Feat/0x5459/store minor refactor

[0x5459]

关联的Issues (Related Issues)

改动 (Proposed Changes)

存储插件接口改动

type Store interface {
	// Type returns the type of this store, just for display.
	Type() string
	// Version returns the version of this store, just for display.
	Version() string
	Instance(context.Context) string
	// InstanceConfig returns the configuration of this store.
	InstanceConfig(ctx context.Context) Config
	// InstanceInfo returns the information of this store.
	InstanceInfo(ctx context.Context) (InstanceInfo, error)

	// SubPath returns the subpath of given params
	// if `pathType` is `PathTypeCustom` then `custom` is not nil otherwise `sectorID` is not nil
	//
	// Example:
	// ```go
	// assert(SubPath(context.TODO(), "cache", sid4040_1001, nil) == ("cache/s-t04040-1001", nil))
	// assert(SubPath(context.TODO(), "sealed", sid4040_1001, nil) == ("sealed/s-t04040-1001", nil))
	// assert(SubPath(context.TODO(), "update", sid4040_1001, nil) == ("update/s-t04040-1001", nil))
	// assert(SubPath(context.TODO(), "update-cache", sid4040_1001, nil) == ("update-cache/s-t04040-1001", nil))
	// assert(SubPath(context.TODO(), "custom", sid4040_1001, "path/to/anything") == ("path/to/anything", nil))
	// -- OR --
	// assert(SubPath(context.TODO(), "cache", sid4040_1001, nil) == ("myprefix/mycache/mysubdir/s-t04040-1001", nil))
	// assert(SubPath(context.TODO(), "sealed", sid4040_1001, nil) == ("myprefix/mysealed/mysubdir/s-t04040-1001", nil))
	// assert(SubPath(context.TODO(), "update", sid4040_1001, nil) == ("myprefix/myupdate/mysubdir/s-t04040-1001", nil))
	// assert(SubPath(context.TODO(), "update-cache", sid4040_1001, nil) == ("myprefix/myupdate-cache/mysubdir/s-t04040-1001", nil))
	// ...
	// ```
	SubPath(ctx context.Context, pathType PathType, sectorID *SectorID, custom *string) (subPath string, err error)
}

附注 (Additional Info)

自查清单 (Checklist)

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• 包含相关的的测试用例或者不需要新增测试用例 / This PR has tests for new functionality or change in behaviour or not need to add new tests.
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