28 lines
971 B
PHP
28 lines
971 B
PHP
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<?php
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namespace App\Services\Runware;
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use App\Models\RunwareModel;
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/**
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* Pre-flight cost estimation used by BudgetGuard before a Runware call is
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* made. Deliberately conservative — the real cost is always reconciled
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* afterward from Runware's response `cost` field (or, for text, `usage.cost`).
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*/
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class CostEstimator
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{
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protected const DEFAULT_VIDEO_DURATION_SECONDS = 5;
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protected const DEFAULT_TEXT_TOKEN_BUDGET = 2048;
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public function estimateUsd(RunwareModel $model, array $params): float
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{
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return match ($model->unit) {
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'per_image' => (float) $model->price_usd * (int) ($params['numberResults'] ?? 1),
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'per_second' => (float) $model->price_usd * (int) ($params['duration'] ?? self::DEFAULT_VIDEO_DURATION_SECONDS),
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'per_million_tokens' => (float) $model->price_usd
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* (((int) ($params['max_completion_tokens'] ?? self::DEFAULT_TEXT_TOKEN_BUDGET)) / 1_000_000),
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};
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}
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}
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