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Data is lost when the process exits.\n * Use for tests, scripts, and prototyping.\n */\n\nimport { MerkleTree, DEFAULT_TREE_DEPTH } from '../core/tree.js'\nimport type { IASPProvider, MerkleProof } from '../core/types.js'\n\nexport interface MemoryProviderConfig {\n /** Merkle tree depth (default: 20) */\n treeDepth?: number\n}\n\nexport class MemoryProvider implements IASPProvider {\n readonly name = 'Memory'\n readonly treeDepth: number\n private members: Set = new Set()\n\n constructor(config?: MemoryProviderConfig) {\n this.treeDepth = config?.treeDepth ?? DEFAULT_TREE_DEPTH\n }\n\n async addMember(identity: bigint): Promise {\n if (identity === 0n) throw new Error('Identity cannot be zero')\n this.members.add(identity)\n }\n\n async removeMember(identity: bigint): Promise {\n this.members.delete(identity)\n }\n\n async getMembers(): Promise {\n return [...this.members]\n }\n\n async hasMember(identity: bigint): Promise {\n return this.members.has(identity)\n }\n\n async getRoot(): Promise {\n const members = [...this.members]\n if (members.length === 0) return 0n\n if (members.length === 1) return members[0]!\n const tree = this.buildTree(members)\n return tree.getRoot()\n }\n\n async getMerkleProof(identity: bigint): Promise {\n const members = [...this.members]\n const tree = this.buildTree(members)\n const index = tree.indexOf(identity)\n if (index === -1) throw new Error('Identity not found in tree')\n return tree.getProof(index)\n }\n\n private buildTree(members: bigint[]): MerkleTree {\n const tree = new MerkleTree(this.treeDepth)\n for (const m of members) {\n tree.insert(m)\n }\n return tree\n }\n}\n","/**\n * REST Provider\n *\n * Delegates ASP member storage to a backend REST API.\n * Use for production ASP services.\n *\n * Expected API endpoints:\n * GET /members → { members: string[] }\n * POST /members → { identity: string } → 201\n * DELETE /members/:identity → 204\n * GET /root → { root: string }\n * GET /proof/:identity → MerkleProof\n */\n\nimport type { IASPProvider, MerkleProof } from '../core/types.js'\nimport { DEFAULT_TREE_DEPTH } from '../core/tree.js'\n\nexport interface RESTProviderConfig {\n /** Base URL of the ASP backend API */\n baseUrl: string\n /** Optional API key for authentication */\n apiKey?: string\n /** Merkle tree depth (default: 20) */\n treeDepth?: number\n /** Custom fetch implementation (default: global fetch) */\n fetch?: typeof fetch\n}\n\nexport class RESTProvider implements IASPProvider {\n readonly name = 'REST API'\n readonly treeDepth: number\n private readonly baseUrl: string\n private readonly headers: Record\n private readonly fetchFn: typeof fetch\n\n constructor(config: RESTProviderConfig) {\n this.treeDepth = config.treeDepth ?? DEFAULT_TREE_DEPTH\n this.baseUrl = config.baseUrl.replace(/\\/$/, '') // strip trailing slash\n this.headers = {\n 'Content-Type': 'application/json',\n ...(config.apiKey ? { Authorization: `Bearer ${config.apiKey}` } : {}),\n }\n this.fetchFn = config.fetch ?? globalThis.fetch.bind(globalThis)\n }\n\n async addMember(identity: bigint): Promise {\n if (identity === 0n) throw new Error('Identity cannot be zero')\n const res = await this.fetchFn(`${this.baseUrl}/members`, {\n method: 'POST',\n headers: this.headers,\n body: JSON.stringify({ identity: identity.toString() }),\n })\n if (!res.ok) throw new Error(`Failed to add member: ${res.status} ${res.statusText}`)\n }\n\n async removeMember(identity: bigint): Promise {\n const res = await this.fetchFn(`${this.baseUrl}/members/${identity}`, {\n method: 'DELETE',\n headers: this.headers,\n })\n if (!res.ok) throw new Error(`Failed to remove member: ${res.status} ${res.statusText}`)\n }\n\n async getMembers(): Promise {\n const res = await this.fetchFn(`${this.baseUrl}/members`, {\n headers: this.headers,\n })\n if (!res.ok) throw new Error(`Failed to get members: ${res.status} ${res.statusText}`)\n const data = (await res.json()) as { members: string[] }\n return data.members.map(s => BigInt(s))\n }\n\n async hasMember(identity: bigint): Promise {\n const members = await this.getMembers()\n return members.includes(identity)\n }\n\n async getRoot(): Promise {\n const res = await this.fetchFn(`${this.baseUrl}/root`, {\n headers: this.headers,\n })\n if (!res.ok) throw new Error(`Failed to get root: ${res.status} ${res.statusText}`)\n const data = (await res.json()) as { root: string }\n return BigInt(data.root)\n }\n\n async getMerkleProof(identity: bigint): Promise {\n const res = await this.fetchFn(`${this.baseUrl}/proof/${identity}`, {\n headers: this.headers,\n })\n if (!res.ok) throw new Error(`Failed to get proof: ${res.status} ${res.statusText}`)\n const data = (await res.json()) as {\n pathElements: string[]\n pathIndices: number[]\n leafIndex: number\n root: string\n }\n return {\n pathElements: data.pathElements.map(s => BigInt(s)),\n pathIndices: data.pathIndices,\n leafIndex: data.leafIndex,\n root: BigInt(data.root),\n }\n }\n}\n"]}