import { type RouteOption, type RouteStep } from "zrouter-sdk";
import { ZROUTER_API_URL } from "./constants.js";
/**
* Serialize a token for JSON transport (BigInt -> string).
*/
function serializeToken(token: { address: string; id?: bigint }) {
return {
...token,
id: token.id != null ? token.id.toString() : undefined,
};
}
/**
* Deserialize a single route from the API (string -> BigInt).
*/
function deserializeRoute(route: any): RouteOption {
return {
...route,
expectedAmount: BigInt(route.expectedAmount),
steps: route.steps.map((step: any) => ({
...step,
amount: step.amount != null ? BigInt(step.amount) : 0n,
limit: step.limit != null ? BigInt(step.limit) : 0n,
deadline: step.deadline != null ? BigInt(step.deadline) : 0n,
expectedAmount: step.expectedAmount != null ? BigInt(step.expectedAmount) : undefined,
tokenIn: {
...step.tokenIn,
id: step.tokenIn?.id ? BigInt(step.tokenIn.id) : undefined,
},
tokenOut: {
...step.tokenOut,
id: step.tokenOut?.id ? BigInt(step.tokenOut.id) : undefined,
},
// Preserve Matcha transaction data
...(step.transaction
? {
transaction: {
...step.transaction,
value: step.transaction.value != null ? BigInt(step.transaction.value) : 0n,
},
}
: {}),
})) as RouteStep[],
};
}
/**
* Fetch routes from the zrouter-api HTTP service.
* Returns RouteOption[] sorted best-first, or null on failure.
*/
export async function fetchApiRoutes(params: {
chainId: number;
tokenIn: { address: string; id?: bigint };
tokenOut: { address: string; id?: bigint };
side: string;
amount: bigint;
owner: string;
slippageBps?: number;
}): Promise<RouteOption[] | null> {
try {
const response = await fetch(`${ZROUTER_API_URL}/quote`, {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
chainId: params.chainId.toString(),
tokenIn: serializeToken(params.tokenIn),
tokenOut: serializeToken(params.tokenOut),
side: params.side,
amount: params.amount.toString(),
owner: params.owner,
slippageBps: params.slippageBps ?? 50,
}),
signal: AbortSignal.timeout(15_000),
});
if (!response.ok) return null;
const data = await response.json();
if (!data.routes || data.routes.length === 0) return null;
return data.routes.map(deserializeRoute);
} catch {
return null;
}
}
