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feat(ledger): operator-authed POST /.admin/tokens/debit - #9
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Adds the metering counterpart of mint: an operator-authed endpoint that debits a WebID's MIND balance, returning 402 insufficient_balance when the owner is out of MIND. Wraps the existing `debit` trait primitive (balance check + append-only debit entry) — the same shape as admin_mint. External LLM chokepoints (Slides' /api/generate, the Builder git bridge) spend a user's free allotment on their behalf with the operator token, rather than requiring a user-signed transfer. The 402 is their signal to fall back to the user's own key. Regenerates docs/openapi.json (drift gate). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This was referenced Jun 20, 2026
Review follow-up — keep the lib.rs route inventory in sync with the new endpoint. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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What
Adds
POST /.admin/tokens/debit— the metering counterpart ofmint. Operator-authed; debits a WebID's MIND balance and returns402 insufficient_balancewhen out of MIND. Thin wrapper over the existingdebittrait primitive (same shape asadmin_mint).Why
mind-node has no external LLM-proxy endpoint — metering only happens internally for pod scripts (
Pod.llm). The Builder/Slides Next apps can't use that path, so they meter via explicit debit: check balance (GET /.admin/tokens?owner=), then debit by WebID after each LLM call.mintalready covers the signup grant. This is the unblocker for the free-LLM onboarding allotment (Builder + Slides).Tested
cargo test -p solidrs-ledger20/20 pass; clippy + rustfmt clean.docs/openapi.jsonregenerated; drift gate (scripts/gen-openapi.sh --check) green.🤖 Generated with Claude Code