Initial commit

Once again a weird place to commit, I have already done a lot of work, but I am just bad at using git, okay.

example-app/server/api/pow/challenge.get.ts

@@ -0,0 +1,44 @@
+import { defineEventHandler } from 'h3'
+import { config } from '~~/server/utils/config';
+import { generate_challenge } from '@impost/lib/validator';
+import { ChallengeStrategy } from '@impost/lib';
+import { CHALLENGE_TIMEOUT_MS, outstandingChallenges } from '~~/server/utils/pow';
+
+export default defineEventHandler(async () => {
+    let challenge_config;
+    switch (config.strategy) {
+        case ChallengeStrategy.LeadingZeroes:
+            challenge_config = {
+                parameters: { expires_at: CHALLENGE_TIMEOUT_MS },
+                strategy: config.strategy,
+                difficulty: config.leading_zeroes?.difficulty!,
+            };
+            break;
+        case ChallengeStrategy.TargetNumber:
+            challenge_config = {
+                parameters: { expires_at: CHALLENGE_TIMEOUT_MS },
+                strategy: config.strategy,
+                max_number: config.target_number.max_number,
+            };
+            break;
+    }
+
+    let challenge = await generate_challenge(challenge_config);
+    if (challenge === null) {
+        throw createError({
+            statusCode: 500,
+            statusMessage: 'Failed to generate challenge'
+        });
+    }
+
+    outstandingChallenges.set(challenge.salt, {
+        challenge, timeout: setTimeout(() => {
+            console.log("Challenge timed out:", challenge.salt);
+            outstandingChallenges.delete(challenge.salt);
+        }, CHALLENGE_TIMEOUT_MS)
+    });
+
+    return {
+        challenge,
+    }
+})