multiformats
Version:
Interface for multihash, multicodec, multibase and CID
5 lines (4 loc) • 13 kB
JavaScript
(function (root, factory) {(typeof module === 'object' && module.exports) ? module.exports = factory() : root.Multiformats = factory()}(typeof self !== 'undefined' ? self : this, function () {
;var Multiformats=(()=>{var P=Object.defineProperty;var pe=Object.getOwnPropertyDescriptor;var ue=Object.getOwnPropertyNames;var le=Object.prototype.hasOwnProperty;var N=(r,e)=>{for(var t in e)P(r,t,{get:e[t],enumerable:!0})},be=(r,e,t,n)=>{if(e&&typeof e=="object"||typeof e=="function")for(let o of ue(e))!le.call(r,o)&&o!==t&&P(r,o,{get:()=>e[o],enumerable:!(n=pe(e,o))||n.enumerable});return r};var xe=r=>be(P({},"__esModule",{value:!0}),r);var _e={};N(_e,{CID:()=>q,bytes:()=>Q,digest:()=>T,hasher:()=>ee,varint:()=>L});var Q={};N(Q,{coerce:()=>E,empty:()=>te,equals:()=>j,fromHex:()=>me,fromString:()=>ye,isBinary:()=>ge,toHex:()=>we,toString:()=>ve});var te=new Uint8Array(0);function we(r){return r.reduce((e,t)=>e+t.toString(16).padStart(2,"0"),"")}function me(r){let e=r.match(/../g);return e!=null?new Uint8Array(e.map(t=>parseInt(t,16))):te}function j(r,e){if(r===e)return!0;if(r.byteLength!==e.byteLength)return!1;for(let t=0;t<r.byteLength;t++)if(r[t]!==e[t])return!1;return!0}function E(r){if(r instanceof Uint8Array&&r.constructor.name==="Uint8Array")return r;if(r instanceof ArrayBuffer)return new Uint8Array(r);if(ArrayBuffer.isView(r))return new Uint8Array(r.buffer,r.byteOffset,r.byteLength);throw new Error("Unknown type, must be binary type")}function ge(r){return r instanceof ArrayBuffer||ArrayBuffer.isView(r)}function ye(r){return new TextEncoder().encode(r)}function ve(r){return new TextDecoder().decode(r)}function Ce(r,e){if(r.length>=255)throw new TypeError("Alphabet too long");for(var t=new Uint8Array(256),n=0;n<t.length;n++)t[n]=255;for(var o=0;o<r.length;o++){var i=r.charAt(o),s=i.charCodeAt(0);if(t[s]!==255)throw new TypeError(i+" is ambiguous");t[s]=o}var c=r.length,h=r.charAt(0),y=Math.log(c)/Math.log(256),U=Math.log(256)/Math.log(c);function J(a){if(a instanceof Uint8Array||(ArrayBuffer.isView(a)?a=new Uint8Array(a.buffer,a.byteOffset,a.byteLength):Array.isArray(a)&&(a=Uint8Array.from(a))),!(a instanceof Uint8Array))throw new TypeError("Expected Uint8Array");if(a.length===0)return"";for(var d=0,C=0,p=0,l=a.length;p!==l&&a[p]===0;)p++,d++;for(var b=(l-p)*U+1>>>0,f=new Uint8Array(b);p!==l;){for(var x=a[p],v=0,u=b-1;(x!==0||v<C)&&u!==-1;u--,v++)x+=256*f[u]>>>0,f[u]=x%c>>>0,x=x/c>>>0;if(x!==0)throw new Error("Non-zero carry");C=v,p++}for(var m=b-C;m!==b&&f[m]===0;)m++;for(var k=h.repeat(d);m<b;++m)k+=r.charAt(f[m]);return k}function $(a){if(typeof a!="string")throw new TypeError("Expected String");if(a.length===0)return new Uint8Array;var d=0;if(a[d]!==" "){for(var C=0,p=0;a[d]===h;)C++,d++;for(var l=(a.length-d)*y+1>>>0,b=new Uint8Array(l);a[d];){var f=t[a.charCodeAt(d)];if(f===255)return;for(var x=0,v=l-1;(f!==0||x<p)&&v!==-1;v--,x++)f+=c*b[v]>>>0,b[v]=f%256>>>0,f=f/256>>>0;if(f!==0)throw new Error("Non-zero carry");p=x,d++}if(a[d]!==" "){for(var u=l-p;u!==l&&b[u]===0;)u++;for(var m=new Uint8Array(C+(l-u)),k=C;u!==l;)m[k++]=b[u++];return m}}}function he(a){var d=$(a);if(d)return d;throw new Error(`Non-${e} character`)}return{encode:J,decodeUnsafe:$,decode:he}}var Ee=Ce,Se=Ee,re=Se;var X=class{name;prefix;baseEncode;constructor(e,t,n){this.name=e,this.prefix=t,this.baseEncode=n}encode(e){if(e instanceof Uint8Array)return`${this.prefix}${this.baseEncode(e)}`;throw Error("Unknown type, must be binary type")}},G=class{name;prefix;baseDecode;prefixCodePoint;constructor(e,t,n){this.name=e,this.prefix=t;let o=t.codePointAt(0);if(o===void 0)throw new Error("Invalid prefix character");this.prefixCodePoint=o,this.baseDecode=n}decode(e){if(typeof e=="string"){if(e.codePointAt(0)!==this.prefixCodePoint)throw Error(`Unable to decode multibase string ${JSON.stringify(e)}, ${this.name} decoder only supports inputs prefixed with ${this.prefix}`);return this.baseDecode(e.slice(this.prefix.length))}else throw Error("Can only multibase decode strings")}or(e){return ne(this,e)}},K=class{decoders;constructor(e){this.decoders=e}or(e){return ne(this,e)}decode(e){let t=e[0],n=this.decoders[t];if(n!=null)return n.decode(e);throw RangeError(`Unable to decode multibase string ${JSON.stringify(e)}, only inputs prefixed with ${Object.keys(this.decoders)} are supported`)}};function ne(r,e){return new K({...r.decoders??{[r.prefix]:r},...e.decoders??{[e.prefix]:e}})}var W=class{name;prefix;baseEncode;baseDecode;encoder;decoder;constructor(e,t,n,o){this.name=e,this.prefix=t,this.baseEncode=n,this.baseDecode=o,this.encoder=new X(e,t,n),this.decoder=new G(e,t,o)}encode(e){return this.encoder.encode(e)}decode(e){return this.decoder.decode(e)}};function oe({name:r,prefix:e,encode:t,decode:n}){return new W(r,e,t,n)}function z({name:r,prefix:e,alphabet:t}){let{encode:n,decode:o}=re(t,r);return oe({prefix:e,name:r,encode:n,decode:i=>E(o(i))})}function Ae(r,e,t,n){let o=r.length;for(;r[o-1]==="=";)--o;let i=new Uint8Array(o*t/8|0),s=0,c=0,h=0;for(let y=0;y<o;++y){let U=e[r[y]];if(U===void 0)throw new SyntaxError(`Non-${n} character`);c=c<<t|U,s+=t,s>=8&&(s-=8,i[h++]=255&c>>s)}if(s>=t||(255&c<<8-s)!==0)throw new SyntaxError("Unexpected end of data");return i}function De(r,e,t){let n=e[e.length-1]==="=",o=(1<<t)-1,i="",s=0,c=0;for(let h=0;h<r.length;++h)for(c=c<<8|r[h],s+=8;s>t;)s-=t,i+=e[o&c>>s];if(s!==0&&(i+=e[o&c<<t-s]),n)for(;(i.length*t&7)!==0;)i+="=";return i}function Ue(r){let e={};for(let t=0;t<r.length;++t)e[r[t]]=t;return e}function w({name:r,prefix:e,bitsPerChar:t,alphabet:n}){let o=Ue(n);return oe({prefix:e,name:r,encode(i){return De(i,n,t)},decode(i){return Ae(i,o,t,r)}})}var O=w({prefix:"b",name:"base32",alphabet:"abcdefghijklmnopqrstuvwxyz234567",bitsPerChar:5}),st=w({prefix:"B",name:"base32upper",alphabet:"ABCDEFGHIJKLMNOPQRSTUVWXYZ234567",bitsPerChar:5}),at=w({prefix:"c",name:"base32pad",alphabet:"abcdefghijklmnopqrstuvwxyz234567=",bitsPerChar:5}),ct=w({prefix:"C",name:"base32padupper",alphabet:"ABCDEFGHIJKLMNOPQRSTUVWXYZ234567=",bitsPerChar:5}),dt=w({prefix:"v",name:"base32hex",alphabet:"0123456789abcdefghijklmnopqrstuv",bitsPerChar:5}),ft=w({prefix:"V",name:"base32hexupper",alphabet:"0123456789ABCDEFGHIJKLMNOPQRSTUV",bitsPerChar:5}),ht=w({prefix:"t",name:"base32hexpad",alphabet:"0123456789abcdefghijklmnopqrstuv=",bitsPerChar:5}),pt=w({prefix:"T",name:"base32hexpadupper",alphabet:"0123456789ABCDEFGHIJKLMNOPQRSTUV=",bitsPerChar:5}),ut=w({prefix:"h",name:"base32z",alphabet:"ybndrfg8ejkmcpqxot1uwisza345h769",bitsPerChar:5});var F=z({prefix:"k",name:"base36",alphabet:"0123456789abcdefghijklmnopqrstuvwxyz"}),xt=z({prefix:"K",name:"base36upper",alphabet:"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"});var g=z({name:"base58btc",prefix:"z",alphabet:"123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"}),gt=z({name:"base58flickr",prefix:"Z",alphabet:"123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ"});var T={};N(T,{Digest:()=>D,create:()=>M,decode:()=>Y,equals:()=>H,hasCode:()=>Xe});var L={};N(L,{decode:()=>I,encodeTo:()=>S,encodingLength:()=>A});var ze=ae,ie=128,Ie=127,Me=~Ie,Ne=Math.pow(2,31);function ae(r,e,t){e=e||[],t=t||0;for(var n=t;r>=Ne;)e[t++]=r&255|ie,r/=128;for(;r&Me;)e[t++]=r&255|ie,r>>>=7;return e[t]=r|0,ae.bytes=t-n+1,e}var Oe=Z,Ve=128,se=127;function Z(r,n){var t=0,n=n||0,o=0,i=n,s,c=r.length;do{if(i>=c)throw Z.bytes=0,new RangeError("Could not decode varint");s=r[i++],t+=o<28?(s&se)<<o:(s&se)*Math.pow(2,o),o+=7}while(s>=Ve);return Z.bytes=i-n,t}var Le=Math.pow(2,7),Te=Math.pow(2,14),Be=Math.pow(2,21),$e=Math.pow(2,28),ke=Math.pow(2,35),Fe=Math.pow(2,42),qe=Math.pow(2,49),Re=Math.pow(2,56),Je=Math.pow(2,63),Pe=function(r){return r<Le?1:r<Te?2:r<Be?3:r<$e?4:r<ke?5:r<Fe?6:r<qe?7:r<Re?8:r<Je?9:10},je={encode:ze,decode:Oe,encodingLength:Pe},Qe=je,V=Qe;function I(r,e=0){return[V.decode(r,e),V.decode.bytes]}function S(r,e,t=0){return V.encode(r,e,t),e}function A(r){return V.encodingLength(r)}function M(r,e){let t=e.byteLength,n=A(r),o=n+A(t),i=new Uint8Array(o+t);return S(r,i,0),S(t,i,n),i.set(e,o),new D(r,t,e,i)}function Y(r){let e=E(r),[t,n]=I(e),[o,i]=I(e.subarray(n)),s=e.subarray(n+i);if(s.byteLength!==o)throw new Error("Incorrect length");return new D(t,o,s,e)}function H(r,e){if(r===e)return!0;{let t=e;return r.code===t.code&&r.size===t.size&&t.bytes instanceof Uint8Array&&j(r.bytes,t.bytes)}}var D=class{code;size;digest;bytes;constructor(e,t,n,o){this.code=e,this.size=t,this.digest=n,this.bytes=o}};function Xe(r,e){return r.code===e}function ce(r,e){let{bytes:t,version:n}=r;switch(n){case 0:return Ke(t,_(r),e??g.encoder);default:return We(t,_(r),e??O.encoder)}}var de=new WeakMap;function _(r){let e=de.get(r);if(e==null){let t=new Map;return de.set(r,t),t}return e}var q=class r{code;version;multihash;bytes;"/";constructor(e,t,n,o){this.code=t,this.version=e,this.multihash=n,this.bytes=o,this["/"]=o}get asCID(){return this}get byteOffset(){return this.bytes.byteOffset}get byteLength(){return this.bytes.byteLength}toV0(){switch(this.version){case 0:return this;case 1:{let{code:e,multihash:t}=this;if(e!==B)throw new Error("Cannot convert a non dag-pb CID to CIDv0");if(t.code!==Ze)throw new Error("Cannot convert non sha2-256 multihash CID to CIDv0");return r.createV0(t)}default:throw Error(`Can not convert CID version ${this.version} to version 0. This is a bug please report`)}}toV1(){switch(this.version){case 0:{let{code:e,digest:t}=this.multihash,n=M(e,t);return r.createV1(this.code,n)}case 1:return this;default:throw Error(`Can not convert CID version ${this.version} to version 1. This is a bug please report`)}}equals(e){return r.equals(this,e)}static equals(e,t){let n=t;return n!=null&&e.code===n.code&&e.version===n.version&&H(e.multihash,n.multihash)}toString(e){return ce(this,e)}toJSON(){return{"/":ce(this)}}link(){return this}[Symbol.toStringTag]="CID";[Symbol.for("nodejs.util.inspect.custom")](){return`CID(${this.toString()})`}static asCID(e){if(e==null)return null;let t=e;if(t instanceof r)return t;if(t["/"]!=null&&t["/"]===t.bytes||t.asCID===t){let{version:n,code:o,multihash:i,bytes:s}=t;return new r(n,o,i,s??fe(n,o,i.bytes))}else if(t[Ye]===!0){let{version:n,multihash:o,code:i}=t,s=Y(o);return r.create(n,i,s)}else return null}static create(e,t,n){if(typeof t!="number")throw new Error("String codecs are no longer supported");if(!(n.bytes instanceof Uint8Array))throw new Error("Invalid digest");switch(e){case 0:{if(t!==B)throw new Error(`Version 0 CID must use dag-pb (code: ${B}) block encoding`);return new r(e,t,n,n.bytes)}case 1:{let o=fe(e,t,n.bytes);return new r(e,t,n,o)}default:throw new Error("Invalid version")}}static createV0(e){return r.create(0,B,e)}static createV1(e,t){return r.create(1,e,t)}static decode(e){let[t,n]=r.decodeFirst(e);if(n.length!==0)throw new Error("Incorrect length");return t}static decodeFirst(e){let t=r.inspectBytes(e),n=t.size-t.multihashSize,o=E(e.subarray(n,n+t.multihashSize));if(o.byteLength!==t.multihashSize)throw new Error("Incorrect length");let i=o.subarray(t.multihashSize-t.digestSize),s=new D(t.multihashCode,t.digestSize,i,o);return[t.version===0?r.createV0(s):r.createV1(t.codec,s),e.subarray(t.size)]}static inspectBytes(e){let t=0,n=()=>{let[J,$]=I(e.subarray(t));return t+=$,J},o=n(),i=B;if(o===18?(o=0,t=0):i=n(),o!==0&&o!==1)throw new RangeError(`Invalid CID version ${o}`);let s=t,c=n(),h=n(),y=t+h,U=y-s;return{version:o,codec:i,multihashCode:c,digestSize:h,multihashSize:U,size:y}}static parse(e,t){let[n,o]=Ge(e,t),i=r.decode(o);if(i.version===0&&e[0]!=="Q")throw Error("Version 0 CID string must not include multibase prefix");return _(i).set(n,e),i}};function Ge(r,e){switch(r[0]){case"Q":{let t=e??g;return[g.prefix,t.decode(`${g.prefix}${r}`)]}case g.prefix:{let t=e??g;return[g.prefix,t.decode(r)]}case O.prefix:{let t=e??O;return[O.prefix,t.decode(r)]}case F.prefix:{let t=e??F;return[F.prefix,t.decode(r)]}default:{if(e==null)throw Error("To parse non base32, base36 or base58btc encoded CID multibase decoder must be provided");return[r[0],e.decode(r)]}}}function Ke(r,e,t){let{prefix:n}=t;if(n!==g.prefix)throw Error(`Cannot string encode V0 in ${t.name} encoding`);let o=e.get(n);if(o==null){let i=t.encode(r).slice(1);return e.set(n,i),i}else return o}function We(r,e,t){let{prefix:n}=t,o=e.get(n);if(o==null){let i=t.encode(r);return e.set(n,i),i}else return o}var B=112,Ze=18;function fe(r,e,t){let n=A(r),o=n+A(e),i=new Uint8Array(o+t.byteLength);return S(r,i,0),S(e,i,n),i.set(t,o),i}var Ye=Symbol.for("@ipld/js-cid/CID");var ee={};N(ee,{Hasher:()=>R,from:()=>He});function He({name:r,code:e,encode:t}){return new R(r,e,t)}var R=class{name;code;encode;constructor(e,t,n){this.name=e,this.code=t,this.encode=n}digest(e){if(e instanceof Uint8Array){let t=this.encode(e);return t instanceof Uint8Array?M(this.code,t):t.then(n=>M(this.code,n))}else throw Error("Unknown type, must be binary type")}};return xe(_e);})();
return Multiformats}));
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