34 lines
971 B
Go
34 lines
971 B
Go
package coinglass
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import "fmt"
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// V_CONSTANTS — 来自 bundle 的硬编码 seed（cg.md "Known branches"）。
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var vConstants = map[string]string{
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"55": "170b070da9654622",
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"66": "d6537d845a964081",
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"77": "863f08689c97435b",
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}
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// resolveSeed 把 v 分支映射到 stage-1 解密的 seed 字符串（spec §4.3）。
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//
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// v="0" → request 时挂的 cache-ts-v2（毫秒 unix ts，字符串）
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// v="1" → URL path（待验证形状，cg.md 标 "shape — verify"）
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// v="2" → response.headers.time
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// v="55" / "66" / "77" → bundle 常量
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//
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// 未知 v → ErrUnknownV，让 collector log + alert 等人工 review bundle。
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func resolveSeed(v, path, reqCacheTsV2, respTime string) (string, error) {
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switch v {
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case "0":
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return reqCacheTsV2, nil
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case "1":
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return path, nil
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case "2":
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return respTime, nil
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}
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if c, ok := vConstants[v]; ok {
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return c, nil
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}
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return "", fmt.Errorf("%w: v=%q (bundle may have added a new case)", ErrUnknownV, v)
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}
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