| 1 | import * as Effect from "effect/Effect"; |
| 2 | import * as Layer from "effect/Layer"; |
| 3 | import * as Binding from "../../Binding.ts"; |
| 4 | import * as Output from "../../Output.ts"; |
| 5 | import { isBindingHost } from "../Lambda/Function.ts"; |
| 6 | import type { Cluster } from "./Cluster.ts"; |
| 7 | import { Connect, connectEnvPrefix, type ConnectOptions } from "./Connect.ts"; |
| 8 | |
| 9 | /** |
| 10 | * Implementation of {@link Connect}. At deploy time it publishes the cluster |
| 11 | * endpoint as `MEMORYDB_{LOGICAL_ID}_{HOST,PORT,TLS}` environment variables |
| 12 | * on the host Function and grants `memorydb:Connect` on the cluster ARN plus |
| 13 | * any IAM-auth users' ARNs; at runtime it resolves the same values into a |
| 14 | * typed connection descriptor. The valkey/redis data plane itself is reached |
| 15 | * over the VPC network — password auth needs no IAM, while IAM auth |
| 16 | * additionally requires the `memorydb:Connect` grant this binding attaches. |
| 17 | */ |
| 18 | export const ConnectHttp = Layer.effect( |
| 19 | Connect, |
| 20 | Effect.gen(function* () { |
| 21 | return Effect.fn(function* (cluster: Cluster, options?: ConnectOptions) { |
| 22 | const Host = yield* cluster.endpointAddress; |
| 23 | const Port = yield* cluster.endpointPort; |
| 24 | const Tls = yield* cluster.tlsEnabled; |
| 25 | |
| 26 | if (!globalThis.__ALCHEMY_RUNTIME__) { |
| 27 | const host = yield* Binding.Host; |
| 28 | if (isBindingHost(host)) { |
| 29 | // MemoryDB is VPC-only — request the host's VPC attachment |
| 30 | // declaratively through the `vpc` binding channel. |
| 31 | const vpc = |
| 32 | options?.subnetIds !== undefined || |
| 33 | options?.securityGroupIds !== undefined |
| 34 | ? { |
| 35 | vpc: { |
| 36 | subnetIds: options?.subnetIds ?? [], |
| 37 | securityGroupIds: options?.securityGroupIds ?? [], |
| 38 | }, |
| 39 | } |
| 40 | : {}; |
| 41 | const prefix = connectEnvPrefix(cluster.LogicalId); |
| 42 | yield* host.bind`Allow(${host}, AWS.MemoryDB.Connect(${cluster}))`({ |
| 43 | env: { |
| 44 | [`${prefix}_HOST`]: cluster.endpointAddress, |
| 45 | // Lambda environment variables are strings — stringify the port. |
| 46 | [`${prefix}_PORT`]: Output.interpolate`${cluster.endpointPort}`, |
| 47 | [`${prefix}_TLS`]: Output.map(cluster.tlsEnabled, (tls) => |
| 48 | String(tls ?? true), |
| 49 | ), |
| 50 | }, |
| 51 | policyStatements: [ |
| 52 | { |
| 53 | Effect: "Allow", |
| 54 | Action: ["memorydb:Connect"], |
| 55 | // IAM auth authorizes against both the cluster and the user. |
| 56 | Resource: [ |
| 57 | Output.interpolate`${cluster.clusterArn}`, |
| 58 | ...(options?.users ?? []).map( |
| 59 | (user) => Output.interpolate`${user.userArn}`, |
| 60 | ), |
| 61 | ], |
| 62 | }, |
| 63 | ], |
| 64 | ...vpc, |
| 65 | }); |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | return Effect.gen(function* () { |
| 70 | const host = yield* Host; |
| 71 | const port = yield* Port; |
| 72 | const tls = yield* Tls; |
| 73 | if (!host || port === undefined) { |
| 74 | return yield* Effect.die( |
| 75 | `MemoryDB endpoint for '${cluster.LogicalId}' is not available yet`, |
| 76 | ); |
| 77 | } |
| 78 | return { |
| 79 | host, |
| 80 | port, |
| 81 | tls: tls ?? true, |
| 82 | }; |
| 83 | }); |
| 84 | }); |
| 85 | }), |
| 86 | ); |