smom-dbis-138/services/token-aggregation/docs/REST_API_REFERENCE.md

Token Aggregation Service — REST API Reference

Base path: /api/v1. Used for discovery of tokens, liquidity pools, prices, volume, and OHLCV by dApps and MetaMask Snap integrations. Supports Chain 138 (DeFi Oracle Meta Mainnet) and Chain 651940 (ALL Mainnet).

Chains

GET /api/v1/chains

Returns supported chains.

Response: { chains: [{ chainId, name, explorerUrl }] }

---

Networks and config (Snap)

GET /api/v1/networks

Full EIP-3085 chain params for wallet_addEthereumChain (Chain 138, Ethereum Mainnet 1, ALL Mainnet 651940). Includes RPC URLs, block explorer URLs, native currency, and oracles per chain. Used by the MetaMask Snap to serve dynamic network and oracle data. If NETWORKS_JSON_URL is set (e.g. GitHub raw URL), the service fetches that URL and returns { version, networks }; otherwise uses built-in networks.

Response: { version: string, networks: NetworkEntry[] }
Each NetworkEntry has: chainId (hex), chainIdDecimal, chainName, rpcUrls, nativeCurrency, blockExplorerUrls, iconUrls (chain-specific logos; optional), oracles: [{ name, address, decimals? }]. Chain 138 and ALL Mainnet include explorer favicons; Ethereum includes standard ETH logo.

GET /api/v1/config

Oracles (and config) per chain. Used by the Snap for USD price feeds (e.g. ETH/USD).

Query: chainId (optional) — if provided, returns config for that chain only.

Response (no query): { version: string, chains: [{ chainId, oracles: [{ name, address }] }] }
Response (chainId=138): { version, chainId: 138, oracles: [{ name, address }] }

---

Token list (report)

GET /api/v1/report/token-list returns a Uniswap-style token list with logoURI per token and a list-level logoURI. Each token has: chainId, address, symbol, name, decimals, type, logoURI. Use for MetaMask token list URL or Snap get_token_list. Optional query ?chainId=138 filters by chain. If TOKEN_LIST_JSON_URL is set (e.g. GitHub raw URL), the service fetches that JSON and returns it (with optional chainId filter); otherwise uses the built-in canonical token list.

---

Quote

GET /api/v1/quote

Returns an estimated swap output amount (constant-product from first available pool for the token pair).

Query:

Param	Type	Required	Description
chainId	number	yes	138 or 651940
tokenIn	string	yes	Token address (in)
tokenOut	string	yes	Token address (out)
amountIn	string	yes	Raw amount in token's smallest unit (integer)

Response: { amountOut: string | null, error?: string, poolAddress?: string | null, dexType?: string }
If no pool is found, amountOut is null and error describes. Used by the MetaMask Snap for swap quotes.

---

Bridge routes

GET /api/v1/bridge/routes

Returns CCIP bridge routes for WETH9 and WETH10 (Chain 138 and Ethereum Mainnet). Used by the MetaMask Snap and dApps for bridge discovery. If BRIDGE_LIST_JSON_URL is set (e.g. GitHub raw URL), the service fetches that JSON and returns { routes, chain138Bridges }; otherwise uses built-in routes.

Response: { routes, chain138Bridges, tokenMappingApi? }

• routes: { weth9: Record<string, string>, weth10: Record<string, string> } — destination chain name → bridge address.
• chain138Bridges: { weth9: string, weth10: string } — Chain 138 bridge addresses.
• tokenMappingApi: When the service runs from the monorepo, { basePath, pairs, resolve, note } — use the same host and these paths for cross-chain token address resolution (138↔651940, 651940↔other chains). Bridge UIs should call GET /api/v1/token-mapping?fromChain=&toChain= or GET /api/v1/token-mapping/resolve?fromChain=&toChain=&address= when resolving token addresses on destination chains.

---

Token mapping (multichain)

When run from the monorepo (with config/token-mapping-multichain.json available):

Endpoint	Description
GET /api/v1/token-mapping?fromChain=138&toChain=651940	Token mapping for a chain pair (tokens, addressMapFromTo, addressMapToFrom).
GET /api/v1/token-mapping/pairs	All defined chain pairs.
GET /api/v1/token-mapping/resolve?fromChain=&toChain=&address=	Resolve token address on target chain.

Use these for bridge UIs and cross-chain address resolution. See token-aggregation README § Token mapping.

---

Tokens

GET /api/v1/tokens

List tokens for a chain with optional market data.

Query:

Param	Type	Required	Description
chainId	number	yes	138 or 651940
limit	number	no	Default 50
offset	number	no	Default 0
includeDodoPool	boolean	no	Include DODO pool flag per token

Response: { tokens: Token[], pagination: { limit, offset, count } }
Each token may include market (price, volume, TVL) and hasDodoPool / pmmPool when requested.

GET /api/v1/tokens/:address

Token detail by chain and address. Includes market data, pools, and external enrichment (CoinGecko, CMC, DexScreener).

Query: chainId (required) — 138 or 651940.

Response: { token: { ...token, onChain, market, external: { coingecko, cmc, dexscreener }, pools[], hasDodoPool, pmmPool } }

GET /api/v1/tokens/:address/pools

Liquidity pools for a token.

Query: chainId (required).

Response: { pools: [{ address, dex, token0, token1, reserves, tvl, volume24h, feeTier }] }

GET /api/v1/tokens/:address/ohlcv

OHLCV (candlestick) data for charts.

Query:

Param	Type	Required	Description
chainId	number	yes	138 or 651940
interval	string	no	One of: 5m, 15m, 1h, 4h, 24h. Default 1h
from	ISO date	no	Start time (default: 7 days ago)
to	ISO date	no	End time (default: now)
poolAddress	string	no	Specific pool for price source

Response: { chainId, tokenAddress, interval, data: OHLCV[] }

GET /api/v1/tokens/:address/signals

Trending/signals (e.g. CoinGecko trending rank) for a token.

Query: chainId (required).

Response: { chainId, tokenAddress, signals: { trendingRank } }

---

Pools

GET /api/v1/pools/:poolAddress

Single pool by chain and pool address.

Query: chainId (required).

Response: { pool: { address, dex, token0, token1, reserves, tvl, volume24h, feeTier } }

---

Search

GET /api/v1/search

Search tokens by symbol or name.

Query: chainId (required), q (required) — search string.

Response: { query, chainId, results: Token[] }

---

Pricing and market data

• Per-token price/volume: Use GET /api/v1/tokens/:address; the market and external fields provide prices and volume (from indexer and CoinGecko/CMC/DexScreener).
• Liquidity (TVL): Use GET /api/v1/tokens/:address/pools or GET /api/v1/pools/:poolAddress; each pool includes tvl and volume24h.
• OHLCV: Use GET /api/v1/tokens/:address/ohlcv for time-series price data.

---

Health

GET /health

Returns service and database health. Response: { status: 'healthy'|'unhealthy', timestamp, services: { database } }.

---

Caching and rate limiting

• Endpoints use short-lived cache (e.g. 1–5 minutes). Use Cache-Control headers from responses.
• /api/v1 is rate-limited; see server configuration for limits.

---

Use for discovery (no CMC/CoinGecko submission)

This API is the primary source for token discovery, liquidity pool discovery, and pricing/market data for Chain 138 and ALL Mainnet. dApps and a custom MetaMask Snap can consume it for:

• Token list and metadata
• Liquidity pools and TVL
• Prices and volume
• OHLCV for charts

Combine with the explorer-hosted token list (https://explorer.d-bis.org/api/config/token-list) for MetaMask token list URL discovery. For dynamic Snap integration, use GET /api/v1/networks and GET /api/v1/config (see "Networks and config (Snap)" above); the Snap can return the token list URL as {apiBaseUrl}/api/v1/report/token-list for MetaMask Settings.