`GET /tokens` response doesn't match oif-specs `GetAssetsResponse` schema

[th0rOdinson]

Summary

The solver's GET /api/v1/tokens endpoint returns a response that differs from the GetAssetsResponse type defined in oif-specs. The field holding the asset list is named tokens instead of assets, and each network object includes extra fields (input_settler, output_settler) not present in the spec.

oif-specs Reference

PR: Asset discovery types (#31)

File: schemas/typescript/types.ts#L936-L994

export interface NetworkAssets {
  chain_id: number;
  assets: AssetInfo[];    // ← "assets"
}

export interface AssetInfo {
  address: Address;       // EIP-7930 interoperable format
  symbol: string;
  decimals: number;
}

export interface GetAssetsResponse {
  networks: Record<string, NetworkAssets>;
}

oif-solver Implementation

Struct definitions: crates/solver-service/src/apis/tokens.rs#L29-L49

pub struct NetworkTokens {
    pub chain_id: u64,
    pub input_settler: String,    // ← not in spec
    pub output_settler: String,   // ← not in spec
    pub tokens: Vec<TokenInfo>,   // ← "tokens" instead of "assets"
}

Handler: crates/solver-service/src/apis/tokens.rs#L54-L81

OpenAPI spec: api-spec/tokens-api.yaml#L120-L148 — also defines tokens and settler fields.

Actual Response (verified 2026-02-11)

curl -s 'http://54.202.245.89:3000/api/v1/tokens'

{
  "networks": {
    "84532": {
      "chain_id": 84532,
      "input_settler": "0x6c0428cc521cc418a8842d46d413f5f96775c67b",
      "output_settler": "0xc450a11afb68731833be13225a88ecdad7d7ed52",
      "tokens": [
        { "address": "0x73c83dacc74bb8a704717ac09703b959e74b9705", "symbol": "USDC", "decimals": 6 }
      ]
    },
    "11155420": {
      "chain_id": 11155420,
      "input_settler": "0x1f0b9d6984f5f9187db70469085f7935453b815f",
      "output_settler": "0x923aa6cc898540092616f97ca770ffb8080354fc",
      "tokens": [
        { "address": "0x191688b2ff5be8f0a5bcab3e819c900a810faaf6", "symbol": "USDC", "decimals": 6 }
      ]
    }
  }
}

Request

Rename the tokens field to assets in NetworkTokens to match the oif-specs NetworkAssets type. The extra fields (input_settler, output_settler) are useful and could remain as optional additions, but they just aren't part of the spec contract.