license: relicense to AGPL-3.0-or-later

.forgejo/workflows/gitleaks.yml

@@ -1,16 +1,8 @@
-# .forgejo/workflows/gitleaks.yml
+# Gitleaks secret-scanning workflow.
 #
-# Gitleaks CI workflow for secret scanning. Use it as a CI secret-scan step, e.g. at
-# `.forgejo/workflows/gitleaks.yml` after the Forgejo act_runner is registered
-# (after a CI runner is configured).
-#
-# Pairs with the server-side pre-receive hook — that one is
-# the strict enforcement layer (rejects the push); this one provides the
-# per-PR red ✗ that branch-protection rules can require before merge.
-#
-# Layer 1 (this workflow): visible per-PR status, can be a required check.
-# Layer 2 (pre-receive hook): strict enforcement at the server.
-# Layer 3 (scheduled cron sweep): nightly full-history sweep across all repos.
+# Scans the repository for committed secrets on every push and pull request,
+# so credentials never land in history unnoticed. It runs on a Forgejo/Gitea
+# Actions runner; copy it to .github/workflows/ to run it on GitHub Actions too.
 
 name: gitleaks
 

LICENSE

@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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+
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+
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+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
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+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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+
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+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
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+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.

README.md

@@ -1,57 +1,138 @@
 # cardano-api
 
-REST API over cardano-db-sync + cardano-node. FastAPI + asyncpg + Redis.
+A REST API over [cardano-db-sync](https://github.com/IntersectMBO/cardano-db-sync)
+and [cardano-node](https://github.com/IntersectMBO/cardano-node), built with
+FastAPI, asyncpg, and Redis.
 
-Read paths hit the db-sync Postgres. UTxO queries, protocol params, and tx submit shell out to `cardano-cli` against a local node socket. Auth is TRP token-gated via CIP-8 wallet signatures.
+Read queries — address balances, native tokens, transaction history, assets,
+stake pools, and blocks — are served directly from the db-sync Postgres
+database. Live UTxO lookups, current protocol parameters, and transaction
+submission shell out to `cardano-cli` against a local node socket. Access is
+gated by API keys, and keys can optionally be issued self-service by proving
+ownership of a wallet that holds a configurable native token (a CIP-8 signature
+challenge).
 
-## Stack
+## Features
 
-- FastAPI / uvicorn
-- asyncpg → cardano-db-sync Postgres (`cexplorer`)
-- redis.asyncio → rate limiting + response cache + API-key storage
-- cardano-cli (baked into the image) → node socket queries + tx submit
-- pycardano + PyNaCl + cbor2 → CIP-8 verification
+- Address balances, native-token holdings, and transaction history from db-sync
+- Block, transaction, asset, and stake-pool lookups
+- Live UTxO and protocol-parameter queries via the node
+- Transaction submission to the network
+- Redis response caching with per-endpoint TTLs
+- Tiered API keys with per-tier rate limits
+- Optional token-gated, self-service key issuance via CIP-8 wallet signatures
+- Strict input validation (bech32 addresses, hex tx hashes / policy IDs) and a
+  body-size cap on transaction submission
 
-## Run
+## Requirements
+
+- A synced `cardano-db-sync` Postgres database (the `cexplorer` schema)
+- A running `cardano-node` with a reachable IPC socket — required only for the
+  node-backed endpoints (live UTxOs, protocol params, tx submit)
+- Redis — rate limiting, response cache, and API-key storage
+- `cardano-cli` on `PATH` — the provided Docker image installs it for you
+
+## Quick start
+
+The container image bundles `cardano-cli`; you provide the db-sync database, a
+node socket, and Redis. A minimal `compose.yml`:
+
+```yaml
+services:
+  cardano-api:
+    build: .
+    ports:
+      - "8765:8765"
+    environment:
+      DB_HOST: postgres-dbsync
+      DB_NAME: cexplorer
+      DB_USER: dbsync
+      DB_PASS: ${DB_PASS}
+      REDIS_HOST: redis
+      API_MASTER_KEY: ${API_MASTER_KEY}
+      CARDANO_NODE_SOCKET_PATH: /node-ipc/node.socket
+      CARDANO_NETWORK: mainnet
+    volumes:
+      - /path/to/node-ipc:/node-ipc
+  redis:
+    image: redis:7
+```
 
 ```
 docker compose up -d --build
 ```
 
-Listens on `:8765` inside the container. Wire it to whatever proxy / port-forward the deploy wants.
+The API listens on port `8765`. Put it behind your own reverse proxy / TLS
+terminator as needed.
 
-## Tiers + rate limits
+To run without Docker:
 
-| Tier | TRP needed | Rate (req/min) | tx submit (per min) | Node read | Node submit |
+```
+pip install -r requirements.txt
+uvicorn main:app --host 0.0.0.0 --port 8765
+```
+
+(Install `cardano-cli` separately if you need the node-backed endpoints.)
+
+## Configuration
+
+All configuration is via environment variables:
+
+| Variable | Default | Description |
+|---|---|---|
+| `DB_HOST` | `postgres-dbsync` | db-sync Postgres host |
+| `DB_PORT` | `5432` | db-sync Postgres port |
+| `DB_NAME` | `cexplorer` | db-sync database name |
+| `DB_USER` | `dbsync` | db-sync database user |
+| `DB_PASS` | _(empty)_ | db-sync database password |
+| `REDIS_HOST` | `redis-api` | Redis host |
+| `REDIS_PORT` | `6379` | Redis port |
+| `API_MASTER_KEY` | _(empty)_ | Unrestricted master key for `/admin/*` |
+| `CARDANO_NODE_SOCKET_PATH` | `/node-ipc/node.socket` | Node IPC socket path |
+| `CARDANO_NETWORK` | `mainnet` | Cardano network |
+
+`TRUSTED_PROXIES` in `main.py` controls which client IPs are allowed to set the
+`X-Forwarded-For` header. It defaults to loopback plus the Docker bridge
+gateways; override it to match your own proxy setup.
+
+## Authentication & tiers
+
+Pass an API key in the `X-API-Key` header (preferred) or as an `?api_key=` query
+parameter. Requests with no key are treated as anonymous.
+
+| Tier | Token balance | Rate (req/min) | tx submit (/min) | Node read | Node submit |
 |---|---|---|---|---|---|
 | anonymous | 0 | 20 | 0 | no | no |
-| standard | ≥50 | 100 | 2 | yes | no |
-| elevated | ≥500 | 1000 | 10 | yes | yes |
+| standard | ≥ 50 | 100 | 2 | yes | no |
+| elevated | ≥ 500 | 1000 | 10 | yes | yes |
 | master | n/a | unlimited | unlimited | yes | yes |
 
-Anonymous is rate-limited per source IP. Authed tiers are rate-limited per key.
+Anonymous requests are rate-limited per source IP; authenticated tiers are
+rate-limited per key. The master key is supplied out-of-band via `API_MASTER_KEY`
+and can mint non-expiring keys at `POST /admin/keys`.
 
-TRP-gated keys expire 48h after issue and must be re-auth'd. A background task re-checks balances every 10 minutes and re-tiers in place.
+### Token-gated keys (optional, self-service)
 
-## Auth flow (TRP-gated)
+A wallet that holds enough of a configured native token can mint its own API key
+by signing a challenge nonce with CIP-8. The gating token's policy ID and the
+tier thresholds are constants near the top of `main.py` — point them at your own
+token to use this flow. Token-gated keys expire 48 hours after issue and can be
+re-authenticated (which also re-tiers them) via `POST /v1/auth/refresh`. A
+background task re-checks balances every 10 minutes and re-tiers keys in place.
 
 ```
 POST /v1/auth/challenge  { "address": "addr1..." }
-  → { "nonce": "...", "expires_at": "..." }
+  -> { "nonce": "...", "expires_at": "..." }
 
-# sign nonce with the wallet via CIP-8
+# sign the nonce with the wallet via CIP-8
 
 POST /v1/auth/verify     { "address", "nonce", "signature", "key" }
-  → { "api_key": "capi_...", "tier", "trp_balance" }
+  -> { "api_key": "capi_...", "tier", "trp_balance" }
 
 POST /v1/auth/refresh    (X-API-Key header — self-service only)
-  → { "tier", "trp_balance", "expires_at", ... }
+  -> { "tier", "trp_balance", "expires_at", ... }
 ```
 
-Master key is issued out-of-band via `API_MASTER_KEY` env. Master-key-created keys (`/admin/keys`) don't expire.
-
-Header is preferred (`X-API-Key: capi_...`); `?api_key=` works too.
-
 ## Endpoints
 
 ```
@@ -87,62 +168,38 @@ POST   /admin/refresh-tiers                                 (master)
 GET    /admin/stats                                         (master)
 ```
 
-## Cache TTLs (Redis)
+## Caching
+
+Responses are cached in Redis with per-endpoint TTLs (seconds):
 
 ```
-balance        60s
-tokens         60s
-transactions   30s
-block_latest   10s
-tx_details    300s   (immutable)
-asset_info    120s
-pool_info     120s
-sync_status     5s
-protocol_params 300s
-utxos          10s
+balance         60      asset_info     120
+tokens          60      pool_info      120
+transactions    30      sync_status      5
+block_latest    10      protocol_params 300
+tx_details     300      utxos           10
 ```
 
-## Validation
+## Security notes
 
-Inputs hit regex gates before any DB query:
+- API keys are stored as `sha256(key)`. The raw key is returned exactly once, at
+  creation; lookups, listing, and revocation all operate on the hash.
+- Every path parameter is validated against a strict regex (bech32
+  mainnet/testnet addresses, 64-hex tx hashes, 56-hex policy IDs) before any
+  query runs.
+- `POST /v1/tx/submit` bodies are capped at 64 KB. The middleware reads the
+  actual request stream, so chunked transfer or a missing `Content-Length`
+  can't bypass the limit.
+- CIP-8 verification rejects non-EdDSA algorithms, wrong key length, empty or
+  mismatched payloads, and any key that doesn't hash to the claimed address.
 
-- bech32 mainnet/testnet addresses (`addr1...` / `addr_test1...`)
-- 64-hex tx hashes
-- 56-hex policy IDs
+## Contributing
 
-Tx submit body is capped at 64 KB (middleware reads the actual stream; chunked transfer can't bypass).
+Issues and pull requests are welcome. Please keep changes focused, run the app
+against a local db-sync + node before submitting, and don't commit secrets — a
+gitleaks workflow scans every push and pull request.
 
-CIP-8 verification rejects non-EdDSA (`alg ≠ -8`), wrong key length, empty payload, payload-not-nonce, and bad key→address hash binding.
+## License
 
-## Key storage
-
-Keys are stored as `sha256(key)`. The raw key is returned exactly once at issue. Lookups, admin listing, and revoke all operate on the hash.
-
-TRP-gated keys are tracked in a `trp_gated_keys` Redis set so the refresh task can batch a single Postgres query for all owner addresses instead of N+1.
-
-## Known policy IDs
-
-```
-TRP  9c4bd4a90cdb73d9ff681215ecf7dea9fb183d916d30487d17098e05
-MAP  24bd9e7b9ae3a61df79eca72fd8355d0f7767e4c55a04a0d919c019c
-```
-
-## Environment
-
-```
-DB_HOST            (default: postgres-dbsync — compose service name)
-DB_PORT            5432
-DB_NAME            cexplorer
-DB_USER            dbsync
-DB_PASS
-
-REDIS_HOST         (default: redis-api — compose service name)
-REDIS_PORT         6379
-
-API_MASTER_KEY     unrestricted-tier key
-
-CARDANO_NODE_SOCKET_PATH   /node-ipc/node.socket
-CARDANO_NETWORK            mainnet
-```
-
-`TRUSTED_PROXIES` (in `main.py`) is the set of IPs whose `X-Forwarded-For` header is honoured. Defaults to loopback + the docker default bridges. If the deployment fronts the API with a different proxy, override the set.
+Released under the GNU Affero General Public License v3.0 or later
+(AGPL-3.0-or-later). See [LICENSE](LICENSE).