wireless-mbus-parser/dist/index.js

Parse telegram data received via wireless mbus

var Pt=[0,15717,31434,18351,62868,51441,36702,45627,54861,60200,44167,37346,9177,7868,22803,25718,37375,44186,60213,54864,25707,22798,7841,9156,18354,31447,15736,29,45606,36675,51436,62857,7835,9214,25681,22836,60175,54890,37317,44192,51414,62899,45596,36729,15682,39,18312,31469,36708,45569,62894,51403,31472,18325,58,15711,22825,25676,9187,7814,44221,37336,54903,60178,15670,83,18428,31385,51362,62919,45672,36621,60283,54814,37297,44244,7919,9098,25637,22848,44233,37292,54787,60262,22877,25656,9111,7922,31364,18401,78,15659,36624,45685,62938,51391,9133,7880,22887,25602,54841,60252,44275,37270,62944,51333,36650,45647,116,15633,31422,18395,45650,36663,51352,62973,18374,31395,15628,105,25631,22906,7893,9136,37259,44270,60225,54820,31340,18185,166,15811,36856,45725,62770,51287,44065,37188,55019,60302,22965,25808,9087,7706,60307,55030,37209,44092,7687,9058,25805,22952,15838,187,18196,31345,51274,62767,45696,36837,25847,22930,7741,9048,37219,44038,60329,54988,45754,36831,51312,62741,18222,31307,15844,129,62728,51309,36802,45735,156,15865,31318,18227,9029,7712,22927,25834,54993,60340,44059,37246,18266,31295,15760,245,45774,36779,51204,62817,37143,44146,60381,54968,25731,23014,7753,9004,54949,60352,44143,37130,9009,7764,23035,25758,232,15757,31266,18247,62844,51225,36790,45779,22977,25764,8971,7790,44117,37168,54943,60410,36748,45801,62790,51235,31256,18301,210,15799,51262,62811,45812,36753,15786,207,18272,31237,7795,8982,25785,23004,60391,54914,37165,44104];function te(e,t,r){let a=0;for(let n=t;n<r;n++)a=Pt[(a>>8^e[n])&255]^a<<8;return~a&65535}function X(e,t,r){let a=te(e,t,r),n=e.readUInt16BE(r);return a===n}function ce(e,t,r){let a=e.readUInt16LE(t);return te(e,t+2,r)===a}var Ie=[140,141,142,143],oe=144,ge=120,K=122,k=114,Te=126,Fe=127,$=121,Ne=[160,161,162,163,164,165,166,167],Le=[160,161,162],Re=0,De=1,Ve=2,Ae=3,J=128,re=127,ve=47,be=0,Ce=1,_=2,b=3,M=4,Pe=5,W=6,Oe=7,Se=8,Me=9,Ue=10,he=11,we=12,U=13,Be=14,ke=15,We={0:"Other",1:"Oil",2:"Electricity",3:"Gas",4:"Heat",5:"Steam",6:"Warm Water (30 - 90 \xB0C)",7:"Water",8:"Heat Cost Allocator",9:"Compressed Air",10:"Cooling load meter (Volume measured at return temperature: outlet)",11:"Cooling load meter (Volume measured at flow temperature: inlet)",12:"Heat (Volume measured at flow temperature: inlet)",13:"Heat / Cooling load meter",14:"Bus / System component",15:"Unknown Medium",16:"Reserved for utility meter",17:"Reserved for utility meter",18:"Reserved for utility meter",19:"Reserved for utility meter",20:"Calorific value",21:"Hot water (> 90 \xB0C)",22:"Cold water",23:"Dual register (hot/cold) Water meter",24:"Pressure",25:"A/D Converter",26:"Smokedetector",27:"Room sensor (e.g. temperature or humidity)",28:"Gasdetector",29:"Reserved for sensors",30:"Reserved for sensors",31:"Reserved for sensors",32:"Breaker (electricity)",33:"Valve (gas)",34:"Reserved for switching devices",35:"Reserved for switching devices",36:"Reserved for switching devices",37:"Customer unit (Display device)",38:"Reserved for customer units",39:"Reserved for customer units",40:"Waste water",41:"Garbage",42:"Carbon dioxide",43:"Environmental meter",44:"Environmental meter",45:"Environmental meter",46:"Environmental meter",47:"Environmental meter",49:"OMS MUC",50:"OMS unidirectional repeater",51:"OMS bidirectional repeater",55:"Radio converter (Meter side)",67:"Heat meter (TCH)",98:"Hot water meter (TCH)",114:"Cold water meter (TCH)",128:"Heat cost allocator (TCH)",240:"Smoke detector (TCH)"};var s=class extends Error{name;message;constructor(t,r){super(),this.name=t,this.message=r}};var d={debug:process.env.DEBUG==="1"?(e,...t)=>{console.log(e,...t)}:(e,...t)=>{},error:(e,...t)=>{console.error(e,...t)}};function ae(e){return e[0]==104&&e[3]==104&&e[e.length-1]==22}function v(e){return e.mField!==void 0}function Ye(e){return e.ci===$}function Ge(e){return e.plainText!==void 0}function He(e,t){let r={manufacturer:e.manufacturer,id:e.meterId,type:e.type,deviceType:C(e.type),version:e.version};return t?.ci==122?{...r,status:t.status,accessNo:t.accessNo}:t?.ci===114?{manufacturer:t.meterManufacturerString,id:t.meterIdString,type:t.meterDevice,deviceType:C(t.meterDevice),version:t.meterVersion,status:t.status,accessNo:t.accessNo,radio:r}:r}function P(e,t,r=0){let a=Math.ceil(e/2),n=Buffer.from(t.subarray(r,r+a)),c=n[a-1]>>4>9?-1:1;c===-1&&(n[a-1]&=15);let l=0;for(let u=0;u<a;u++)l+=((n[u]&15)+((n[u]&240)>>4)*10)*Math.pow(100,u);return Math.trunc(c*l)}function h(e,t=0){return(Buffer.isBuffer(e)?e.readUint32LE(t):e).toString(16).padStart(8,"0")}function Z(e){return String.fromCharCode((e>>10)+64)+String.fromCharCode((e>>5&31)+64)+String.fromCharCode((e&31)+64)}function C(e){return We[e]||"unknown"}function Xe(e){let t=e&4,r=e&8,a=e&16,n=e&224,c=(t?"; low power":"")+(r?" (permanent)":"")+(a?" (temporary)":"")+(n?"; Manufacturer specific 0b"+n.toString(2).padStart(8,"0"):"");switch(e&3){case 0:return"No error"+c;case 1:return"Busy"+c;case 2:return"Error"+c;case 3:return"Alarm"+c}}function Ke(e){(e&128)>>8===0||d.debug("Warning: Invalid date encountered!");let r=e&63,a=(e&7936)>>8,n=(e&2031616)>>16,c=(e&251658240)>>24,l=(e&4026531840)>>25|(e&14680064)>>21;return new Date(l+2e3,c-1,n,a,r,0)}function $e(e){let t=e&31,r=(e&3840)>>8,a=(e&61440)>>9|(e&224)>>5;return new Date(a+2e3,r-1,t)}function Je(e){let t=Buffer.alloc(6);t.writeUIntLE(e,0,6);let r=t[0]&63,a=t[1]&63,n=t[2]&31,c=t[3]&31,l=t[4]&15,u=(t[3]&224)>>5|(t[4]&240)>>1;return new Date(u+2e3,l-1,c,n,a,r)}function ie(e){let t=e&31,r=(e&480)>>5,a=(e&32256)>>9;return new Date(a+2e3,r-1,t)}function le(e){let t=(e&496)>>4,r=(e&7680)>>9,a=new Date().getFullYear();return new Date(a,r-1,t)}function Ze(e,t){let r=(e&3968)>>7,a=(t&120)>>3,n=new Date().getFullYear();return new Date(n,a-1,r)}function w(e){let t=e.getDate(),r=e.getMonth()+1,a=e.getFullYear()-2e3,n=a&7;return(a&120)>>3<<12|r<<8|n<<5|t}function Ot(e,t=0){if(e.length<8+t)return"ERR-XXXXXXXX";let r=Z(e.readUint16LE(t+2)),a=h(e,t+4);return`${r}-${a}`}function je(e){if(!X(e,0,10))return!1;let t=12,r=Math.min(e.length,G(e))-2;for(;t<e.length;){let a=Math.min(t+16,r);if(!X(e,t,a))return!1;t+=18}return!0}function qe(e){if(e[0]>=128&&!X(e,128,e.length-2))return!1;let r=Math.min(128,e.length)-2;return X(e,0,r)}function Qe(e){let t=[];t.push(e.subarray(0,10));let r=12,a=Math.min(e.length,G(e))-2;for(;r<e.length;){let n=Math.min(r+16,a);t.push(e.subarray(r,n)),r+=18}return Buffer.concat(t)}function et(e){let t=e.subarray(0,Math.min(128,e.length)-2);return e[0]>=128?Buffer.concat([t,e.subarray(128,e.length-2)]):Buffer.from(t)}function G(e){let t=e[0]+1,r=t-10,a=Math.ceil(r/16);return t+(a+1)*2}function St(e){let t=e[0]+1;if(t>e.length)throw new s("CRC_ERROR",`Telegram data is too short! Expected at least ${t} bytes, but got only ${e.length}`);if(t==e.length)return qe(e)?et(e):Buffer.from(e);if(G(e)>e.length)throw new s("CRC_ERROR",`Telegram data is too short! Expected at least ${G(e)} bytes, but got only ${e.length}`);if(je(e))return Qe(e);throw new s("CRC_ERROR","Frame type A CRC check failed!")}function Mt(e){let t=e[0]+1;if(t>e.length)throw new s("CRC_ERROR",`Telegram data is too short! Expected at least ${t} bytes, but got only ${e.length}`);if(t==e.length){if(qe(e))return et(e);throw new s("CRC_ERROR","Frame type B CRC check failed!")}else{let r=G(e),a=e;if(r>e.length)throw new s("CRC_ERROR",`Telegram data is too short! Expected at least ${G(e)} bytes, but got only ${e.length}`);if(r<e.length&&(a=e.subarray(0,r)),je(a))return Qe(a);throw new s("CRC_ERROR","Frame type A CRC check failed!")}}function ze(e){let t=e[0]+1;return e.subarray(0,t)}function Ut(e){let t=e[1];if(e[2]!=t)throw new s("CRC_ERROR","Telegram is not a valid wired M-Bus frame!");let r=0;for(let a=4;a<e.length-2;a++)r=r+e[a]&255;if(r!=e[e.length-2])throw new s("CRC_ERROR","Wired M-Bus frame CRC check failed!");return Buffer.from(e.subarray(0,e.length-2))}function pe(e,t){return ae(e)?Ut(e):t===void 0?St(e):t?ze(Mt(e)):Buffer.from(ze(e))}import{AesCmac as tt}from"aes-cmac";import{createDecipheriv as ht}from"crypto";function wt(e,t,r,a){let n=e.length%16,c=e.length,l=ht(a,r,t);return l.setAutoPadding(!1),n&&(e=Buffer.concat([e,Buffer.alloc(16-n)])),Buffer.concat([l.update(e),l.final()]).subarray(0,c)}function q(e,t,r,a,n,c){let l=e.subarray(n,n+c);d.debug(`Encrypted data: ${l.toString("hex")}`),d.debug(`IV: ${r.toString("hex")}`);let u=wt(l,r,t,a);if(d.debug(`Decrypted data: ${u.toString("hex")}`),!u.length)throw new s("DECRYPTION_ERROR",`Decryption (${a}) failed! IV: ${r.toString("hex")}`);return Buffer.concat([e.subarray(0,n),u,e.subarray(n+c)])}async function rt(e,t){if(t.afl.mcr===void 0)throw new s("DECRYPTION_ERROR","Cannot dervice Kenc without MCR from AFL!");let r=Buffer.alloc(16,7);r[0]=0,r.writeUInt32LE(t.afl.mcr,1),t.apl.ci===k?r.writeUInt32LE(t.apl.meterId,5):r.writeUInt32LE(t.ll.aField,5);let a=new tt(e),n=Buffer.from(await a.calculate(r));d.debug(`Kenc: ${n.toString("hex")}`),r[0]=1;let c=Buffer.from(await a.calculate(r));return d.debug(`Kmac: ${c.toString("hex")}`),{kenc:n,kmac:c}}async function at(e,t,r){let a=Buffer.alloc(5+(r.fcl.mlp?2:0));a[0]=r.mclRaw,a.writeUInt32LE(r.mcr,1),r.fcl.mlp&&a.writeUInt16LE(r.ml,5);let n=Buffer.concat([a,t]),c=await new tt(e),l=Buffer.from(await c.calculate(n));if(d.debug(`MAC: ${l.toString("hex")}`),r.mac.compare(l.subarray(0,8))!=0)throw new s("WRONG_AES_KEY",`Received MAC does not match. Wrong key?
MAC received: ${r.mac.toString("hex")}`)}var Bt=Buffer.from("39BC8A10E66D83F8","hex"),kt=Buffer.from("51728910E66D83F8","hex");function Wt(e){let t=e.addressRaw[2],r=e.addressRaw[3],a=Buffer.alloc(2);a.writeUInt8(t,0),a.writeUInt8(r,1);let n=Buffer.concat([e.addressRaw.subarray(0,2),e.addressRaw.subarray(4),Buffer.from(a)]);return{lField:e.lField,cField:e.cField,mField:e.mField,aField:n.readUInt32LE(2),version:t,type:r,addressRaw:n,aFieldRaw:n.subarray(2),manufacturer:e.manufacturer,typeString:C(r),meterId:h(n,2)}}function it(e,t,r,a){return(e.readUint32BE(0)^e.readUint32BE(4)^t.readUint32BE(0)^t.readUint32BE(4)^r.readUint32BE(a))>>>0}function ot(e){let t=+((e&2)!=0)^+((e&4)!=0)^+((e&2147483648)!=0)^+((e&2048)!=0);return e<<1|t}function nt(e,t,r){for(let n=0;n<8;n++)e=ot(e);return(t[r+5]^e&255)===75}function Yt(e,t,r){let a=it(Bt,e,t,r);if(nt(a,t,r))return a;{let n=it(kt,e,t,r);if(nt(n,t,r))return n;throw new Error("No matching key to decrypt PRIOS telegram found!")}}function Gt(e,t,r){let a=Buffer.alloc(t.length-r);t.copy(a,0,r,r+10);for(let n=r+5;n<t.length;n++){for(let c=0;c<8;c++)e=ot(e);a[n-r]=t[n]^e&255}return a}function ct(e){let t=Object.keys(e).reduce((r,a)=>{if(e[a]){let n=a.replace(/[A-Z]/,c=>` ${c.toLowerCase()}`);return r?`${r}, ${n}`:n}return r},"");return t.length?t:"no alarms"}function Ht(e){let t={general:(e[1]&128)!==0,leakage:(e[2]&128)!==0,meterBlocked:(e[2]&32)!==0,backflow:(e[3]&128)!==0,underflow:(e[3]&64)!==0,overflow:(e[3]&32)!==0,submarine:(e[3]&16)!==0,sensorFraud:(e[3]&8)!==0,mechanicalFraud:(e[3]&2)!==0},r=ct(t),a={leakage:(e[2]&64)!==0,sensorFraud:(e[3]&4)!==0,mechanicalFraud:(e[3]&1)!==0},n=ct(a);return{current:r,previous:n}}function Xt(e){let t=Ht(e),r=Buffer.alloc(36+t.current.length+t.previous.length),a=0;r[a++]=M,r[a++]=e[4],e.copy(r,a,6,10),a+=4,r[a++]=M|64,r[a++]=e[4],e.copy(r,a,10,14),a+=4,r[a++]=_|64,r[a++]=108,e.copy(r,a,14,16),a+=2,r[a++]=_,r[a++]=255,r[a++]=110;let n=(e[2]&31)*6;r.writeUInt16LE(n,a),a+=2,r[a++]=b,r[a++]=255,r[a++]=44;let c=1<<(e[1]&15)+2;return r.writeUIntLE(c,a,3),a+=3,r[a++]=U,r[a++]=255,r[a++]=23,r[a++]=t.current.length,r.write(t.current.split("").reverse().join(""),a,"ascii"),a+=t.current.length,r[a++]=U,r[a++]=255,r[a++]=151,r[a++]=62,r[a++]=t.previous.length,r.write(t.previous.split("").reverse().join(""),a,"ascii"),r}function lt(e,t){if(!v(t))throw new Error("PRIOS telegram without full link layer!");let{pos:r,data:a}=e,n=Yt(t.addressRaw,a,r),c=Gt(n,a,r),l=Xt(c),u=Buffer.concat([a.subarray(0,r),l]),m={ci:a[r],offset:r};return{state:{...e,data:u,pos:r+1},applicationLayer:m,linkLayer:Wt(t)}}var B={HCA:"HCA",Heat:"Heat",Water:"Water",Smoke:"Smoke"},Kt=[97,100,105,148];function $t(e){switch(e){case 98:case 114:return B.Water;case 67:case 69:return B.Heat;case 128:return B.HCA;case 240:return B.Smoke;default:throw new Error(`Unkown Techem device type! 0x${e.toString(16)}`)}}function Jt(e,t,r){if(!Kt.includes(r))throw new Error(`Unknown TCH HCA version 0x${r.toString(16)}`);let a=r==148?15:r==105?14:10;if(t+a>e.length)throw new Error("Telegram to short for TCH HCA coding!");let n=Buffer.alloc(29),c=0,l=w(ie(e.readUInt16LE(t+2)));n[c++]=_|64,n[c++]=108,n.writeUInt16LE(l,c),c+=2,n[c++]=_|64,n[c++]=110,n[c++]=e[t+4],n[c++]=e[t+5];let u=w(le(e.readUInt16LE(t+6)));if(n[c++]=_,n[c++]=108,n.writeUInt16LE(u,c),c+=2,n[c++]=_,n[c++]=110,n[c++]=e[t+8],n[c++]=e[t+9],r!=148&&r!=105)return n.subarray(0,16);let m=r===148?t+11:t+10,g=e.readUint16LE(m);n[c++]=_,n[c++]=101,n[c++]=e[m],n[c++]=e[m+1];let x=e.readUint16LE(m+2);n[c++]=_,n[c++]=101,n[c++]=e[m+2],n[c++]=e[m+3];let F=g-x;return n[c++]=U,n[c++]=97,n[c++]=226,n.writeInt16LE(F,c),c+=2,n}function Zt(e,t){let r=Buffer.alloc(21),a=0,n=w(ie(e.readUInt16LE(t+2)));r[a++]=_|64,r[a++]=108,r.writeUInt16LE(n,a),a+=2,r[a++]=_|64,r[a++]=21,r[a++]=e[t+4],r[a++]=e[t+5];let c=e.readUint16LE(t+4),l=w(le(e.readUInt16LE(t+6)));r[a++]=_,r[a++]=108,r.writeUInt16LE(l,a),a+=2,r[a++]=_,r[a++]=21,r[a++]=e[t+8],r[a++]=e[t+9];let u=e.readUint16LE(t+8);return r[a++]=b,r[a++]=21,r.writeUIntLE(u+c,a,3),r}function zt(e,t){let r=Buffer.alloc(24),a=0,n=w(ie(e.readUInt16LE(t+2)));r[a++]=_|64,r[a++]=108,r.writeUInt16LE(n,a),a+=2,r[a++]=b|64,r[a++]=6,r[a++]=e[t+4],r[a++]=e[t+5],r[a++]=e[t+6];let c=e.readUintLE(t+4,3),l=w(Ze(e.readUInt8(t+11),e.readInt8(t+7)));r[a++]=_,r[a++]=108,r.writeUInt16LE(l,a),a+=2,r[a++]=b,r[a++]=6,r[a++]=e[t+8],r[a++]=e[t+9],r[a++]=e[t+10];let u=e.readUint16LE(t+8);return r[a++]=M,r[a++]=6,r.writeUInt32LE(u+c,a),r}function jt(e,t,r,a){switch(e){case B.HCA:return Jt(t,r,a);case B.Water:return Zt(t,r);case B.Heat:return zt(t,r);default:throw new Error("Not yet implemented!")}}function pt(e,t){let{pos:r,data:a}=e,n=$t(t.type),c=jt(n,a,r,t.version),l=Buffer.concat([a.subarray(0,r),c]),u={ci:a[r],offset:r};return{state:{...e,data:l,pos:r+1},applicationLayer:u,linkLayer:t}}function qt(e,t,r){let a=e.readUInt16LE(t);t+=2;let n=e.readUInt16LE(t);return t+=2,{newPos:t,apl:{ci:$,offset:r,headerCrc:a,frameCrc:n}}}function st(e,t,r){let a=e[t++],n=e[t++],c=Xe(n),{config:l,newPos:u}=ir(e,t);return{newPos:u,apl:{ci:K,offset:r,accessNo:a,statusCode:n,status:c,config:l}}}function Qt(e,t,r){let a=e.readUInt32LE(t);t+=4;let n=e.readUInt16LE(t);t+=2;let c=e[t++],l=e[t++],u=st(e,t,r);return{newPos:u.newPos,apl:{...u.apl,ci:k,meterId:a,meterIdString:h(a),meterManufacturer:n,meterManufacturerString:Z(n),meterVersion:c,meterDevice:l,meterDeviceString:C(l)}}}function ue(e){return v(e)?e:{lField:e.lField,mField:0,cField:e.cField,aField:e.aField,version:0,type:0,addressRaw:Buffer.alloc(8),aFieldRaw:Buffer.alloc(6),manufacturer:"AAA",typeString:"unknown",meterId:"00000000"}}function er(e,t){if(v(t))return t;if(e.ci!==k)return ue(t);let r=Buffer.alloc(8);return r.writeUInt32LE(e.meterManufacturer,0),r.writeUInt32LE(e.meterId,2),r[6]=e.meterVersion,r[7]=e.meterDevice,{lField:t.lField,mField:e.meterManufacturer,cField:t.cField,aField:t.aField,version:e.meterVersion,type:e.meterDevice,addressRaw:r,aFieldRaw:r.subarray(2),manufacturer:e.meterManufacturerString,typeString:e.meterDeviceString,meterId:e.meterIdString}}function tr(e,t){return{mode:e,bidirectional:(t&32768)!==0,accessability:(t&16384)!==0,synchronous:(t&8192)!==0,encryptedBlocks:(t&240)>>4,content:(t&12)>>2,hopCounter:t&3}}function rr(e,t,r){return{mode:e,content:(t&49152)>>14,encryptedBlocks:(t&240)>>4,kdfSel:(r&48)>>4,keyid:r&15}}function ar(e,t,r){return{mode:e,content:(t&49152)>>14,encryptedBytes:t&255,protoType:r&15}}function ir(e,t){let r=e.readUInt16LE(t);t+=2;let a=(r&7936)>>8;switch(a){case 0:case 5:return{config:tr(a,r),newPos:t};case 7:return{config:rr(a,r,e[t]),newPos:t+1};case 13:return{config:ar(a,r,e[t]),newPos:t+1};default:throw new s("UNIMPLEMENTED_FEATURE",`Unhandled config mode ${a}`)}}function nr(){return Buffer.alloc(16,0)}function cr(e,t){let r=Buffer.alloc(16,e.accessNo);return e.ci===K?t.addressRaw.copy(r,0):(r.writeUInt16LE(e.meterManufacturer,0),r.writeUInt32LE(e.meterId,2),r.writeUInt8(e.meterVersion,6),r.writeUInt8(e.meterDevice,7)),r}function or(e,t){return v(e)&&e.manufacturer==="DME"&&Ne.includes(t)}function lr(e,t){return v(e)&&e.manufacturer==="TCH"&&Le.includes(t)}async function ft(e,t,r){let a=e.data,n=e.pos,c=n,l=a[n++];if(l===Te||l===Fe)throw new s("UNIMPLEMENTED_FEATURE","Payload is SML encoded. SML decoding is not implemented");if(l===ge)return{state:{...e,pos:n},applicationLayer:{ci:l,offset:c},linkLayer:ue(t)};if(l===$){let{newPos:x,apl:F}=qt(a,n,c);return{state:{...e,pos:x},applicationLayer:F,linkLayer:ue(t)}}let u,m;if(l===K||l===k){let x=l===K?st(a,n,c):Qt(a,n,c);n=x.newPos,u=x.apl,m=er(u,t)}else{if(or(t,l))return lt(e,t);if(lr(t,l))return pt(e,t);throw new s("UNIMPLEMENTED_FEATURE",`Unsupported CI Field 0x${l.toString(16)}
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E={Number:"Number",BigInt:"BigInt",String:"String",Date:"Date",DateTime:"DateTime",Buffer:"Buffer",Null:"Null"},T={Default:"Default",FD:"FD",FB:"FB",Plain:"Plain",Manufacturer:"Manufacturer"};function ur(e,t){let r={tariff:0,deviceUnit:0,storageNo:0,functionField:0,dataField:0},a=e[t++],n=0;for(r.storageNo=(a&64)>>6,r.functionField=(a&48)>>4,r.dataField=a&15;a&J;){if(t>=e.length)throw new s("UNEXPECTED_STATE","No data but DIF extension bit still set!");if(a=e[t++],n>9)throw new s("UNEXPECTED_STATE","Too many DIF extensions!");r.storageNo|=(a&15)<<n*4+1,r.tariff|=(a&48)>>4<<n*2,r.deviceUnit|=(a&64)>>6<<n,n++}return{newPos:t,dib:r}}function Q(e,t,r){return t===T.Plain?{vif:e&re,table:T.Plain,plainText:r,extensionBitSet:(e&J)!==0}:{vif:e&re,table:t,extensionBitSet:(e&J)!==0}}function sr(e,t){let r=e[t++];if(r==251){let a=e[t++];return{newPos:t,primary:Q(a,T.FB)}}else if(r==253){let a=e[t++];return{newPos:t,primary:Q(a,T.FD)}}else if(r==255){let 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