14 lines
551 B
TypeScript
14 lines
551 B
TypeScript
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/**
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* formatScaled formats a per-token (or per-request) USD price scaled by `scale`.
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*
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* formatScaled(0.000003, 1_000_000) → "$3" // per 1M tokens
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* formatScaled(0.5, 1) → "$0.5" // per request
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* formatScaled(null, 1_000_000) → "-"
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*
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* Uses toPrecision(10) then strips trailing zeros to avoid IEEE 754 display noise.
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*/
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export function formatScaled(value: number | null, scale: number): string {
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if (value == null) return '-'
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return `$${(value * scale).toPrecision(10).replace(/\.?0+$/, '')}`
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}
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