Add MIT LICENSE file

app/lib/api/vouching.ts

@@ -0,0 +1,103 @@
+export interface VouchRequest {
+  id: string
+  learnerAddress: string
+  reputationScore: number
+  loanAmount: string
+  purpose: string
+  requestedAt: string
+}
+
+export interface ActiveVouch {
+  id: string
+  learnerAddress: string
+  reputationBoost: number
+  expiresAt: string
+  repaymentStatus: "on_track" | "late" | "completed" | "defaulted"
+}
+
+export interface VouchImpact {
+  scoreBefore: number
+  scoreAfter: number
+  interestRateBefore: string
+  interestRateAfter: string
+}
+
+const DEFAULT_API_BASE = "http://localhost:3001"
+
+function apiBase(): string {
+  if (typeof process !== "undefined" && process.env?.NEXT_PUBLIC_API_URL) {
+    return process.env.NEXT_PUBLIC_API_URL
+  }
+  return DEFAULT_API_BASE
+}
+
+export class VouchingApiError extends Error {
+  constructor(public readonly status: number, message: string) {
+    super(message)
+    this.name = "VouchingApiError"
+  }
+}
+
+async function readError(res: Response): Promise<string> {
+  try {
+    const body = (await res.json()) as { message?: string }
+    if (typeof body.message === "string") return body.message
+  } catch {
+    /* ignore */
+  }
+  return `request failed with ${res.status}`
+}
+
+export async function getVouchRequests(
+  init: { signal?: AbortSignal } = {},
+): Promise<VouchRequest[]> {
+  const res = await fetch(`${apiBase()}/vouching/requests`, {
+    method: "GET",
+    headers: { Accept: "application/json" },
+    signal: init.signal,
+    cache: "no-store",
+  })
+  if (!res.ok) throw new VouchingApiError(res.status, await readError(res))
+  return (await res.json()) as VouchRequest[]
+}
+
+export async function getMyVouches(
+  init: { signal?: AbortSignal } = {},
+): Promise<ActiveVouch[]> {
+  const res = await fetch(`${apiBase()}/vouching/given`, {
+    method: "GET",
+    headers: { Accept: "application/json" },
+    signal: init.signal,
+    cache: "no-store",
+  })
+  if (!res.ok) throw new VouchingApiError(res.status, await readError(res))
+  return (await res.json()) as ActiveVouch[]
+}
+
+export async function submitVouch(
+  learnerAddress: string,
+  init: { signal?: AbortSignal } = {},
+): Promise<void> {
+  const res = await fetch(`${apiBase()}/vouching`, {
+    method: "POST",
+    headers: {
+      "Content-Type": "application/json",
+      Accept: "application/json",
+    },
+    body: JSON.stringify({ learnerAddress }),
+    signal: init.signal,
+  })
+  if (!res.ok) throw new VouchingApiError(res.status, await readError(res))
+}
+
+export async function revokeVouch(
+  id: string,
+  init: { signal?: AbortSignal } = {},
+): Promise<void> {
+  const res = await fetch(`${apiBase()}/vouching/${id}`, {
+    method: "DELETE",
+    headers: { Accept: "application/json" },
+    signal: init.signal,
+  })
+  if (!res.ok) throw new VouchingApiError(res.status, await readError(res))
+}