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{ Buffer } from 'node:buffer';\nimport { PNG } from 'npm:pngjs@7.0.0';\nimport { createWorker, PSM } from 'npm:tesseract.js@7.0.0';\nimport { blob } from 'https://esm.town/v/std/blob/global.ts';\nimport { detectChromaticComponents } from './visual_regions_v1.ts';\nimport { digitCropRect } from './canvas_digit_crop_geometry_v1.ts';\nimport { createCloudflareBrowserClientV3 as createV4 } from 'https://esm.town/v/mosadek/project-brain-cloudflare-adapter-v2@20-main/cloudflare_browser_client_v4_candidate.ts';\nconst challenge_id='CANVAS2-HI-1789517440739-97c8d837',host='mosadek--0b14f18ab15111f1b1b31607ee4eb77e.web.val.run',target=`https://${host}/?challenge_id=${encodeURIComponent(challenge_id)}`;\nconst accountId=Deno.env.get('CLOUDFLARE_ACCOUNT_ID')||'',apiToken=Deno.env.get('CLOUDFLARE_API_TOKEN')||'';if(!accountId||!apiToken)throw new Error('CF_CREDENTIALS_MISSING');\nconst sr=await fetch(`https://api.cloudflare.com/client/v4/accounts/${encodeURIComponent(accountId)}/subscriptions`,{headers:{Authorization:`Bearer ${apiToken}`}});const sj:any=await sr.json();const subscriptions=Array.isArray(sj?.result)?sj.result:[];if(!sr.ok||subscriptions.length!==0)throw new Error('ZERO_COST_GATE_FAILED');\nconst client=createV4({accountId,apiToken,allowedDomains:[host]});const worker=await createWorker('eng');const enc=new TextEncoder();\nfunction decode(b:string){return PNG.sync.read(Buffer.from(b,'base64')) as any}\nfunction crop(src:any,b:any,pad=8){const x1=Math.max(0,b.x1-pad),y1=Math.max(0,b.y1-pad),x2=Math.min(src.width-1,b.x2+pad),y2=Math.min(src.height-1,b.y2+pad),w=x2-x1+1,h=y2-y1+1,out=new PNG({width:w,height:h});for(let y=0;y30){n++;x1=Math.min(x1,x);y1=Math.min(y1,y);x2=Math.max(x2,x);y2=Math.max(y2,y)}}if(x2<0)return{text:'',changed_pixels:0};return{text:await ocr(crop(after,{x1,y1,x2,y2},24)),changed_pixels:n}}\nfunction canon(x:any):string{if(x===null||typeof x!=='object')return JSON.stringify(x);if(Array.isArray(x))return '['+x.map(canon).join(',')+']';return '{'+Object.keys(x).sort().map(k=>JSON.stringify(k)+':'+canon(x[k])).join(',')+'}'}\nasync function sha(x:any){return [...new Uint8Array(await crypto.subtle.digest('SHA-256',enc.encode(canon(x))))].map(v=>v.toString(16).padStart(2,'0')).join('')}\nconst ev:any={schema:'CANVAS_REPAIR_VALIDATION_CANDIDATE_V1',challenge_id,route:'CF_V4_ADAPTIVE_DIGIT_CROP',zero_cost_gate:{subscriptions_count:0,passed:true},promotion_authorized:false,p_superhero_increment:0};\nconst started=await client.start(),sid=started.session_id;await client.setViewport(sid,1000,700);\ntry{let s:any=await client.navigate(sid,target);ev.initial_dom_interactive_count=Array.isArray(s.elements)?s.elements.length:null;ev.initial_screenshot_sha256=s.screenshot_sha256;if(ev.initial_dom_interactive_count!==0)throw new Error('CHALLENGE_NOT_NON_DOM');const ini=await 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t=await ocr(cropDigits(p,r));tileVisual.push({...r,ocr:t,crop_rect:digitCropRect(r,p.width,p.height)});if(/^\\d{2}$/.test(t))tiles.push({...r,value:Number(t)})}await worker.setParameters({tessedit_pageseg_mode:PSM.AUTO,tessedit_char_whitelist:''} as any);ev.tile_visual_regions=tileVisual;if(tiles.length!==4)throw new Error('FOUR_TILE_VALUES_NOT_VISUALLY_IDENTIFIED:'+JSON.stringify(tileVisual));ev.observed_tile_values=tiles.map(x=>x.value);const ordered=[...tiles].sort((a,b)=>a.value-b.value);ev.click_order=ordered.map(x=>x.value);for(const t of ordered){s=await client.clickAt(sid,t.cx,t.cy);await new Promise(r=>setTimeout(r,120))}await new Promise(r=>setTimeout(r,500));s=await client.snapshot(sid);const fp=decode(s.screenshot_base64);await worker.setParameters({tessedit_pageseg_mode:PSM.SINGLE_LINE,tessedit_char_whitelist:'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789:-'} as any);const band=await ocr(cropReceipt(fp));await 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