multiformats
Version:
Interface for multihash, multicodec, multibase and CID
4 lines (3 loc) • 12.1 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 R=Object.defineProperty;var fe=Object.getOwnPropertyDescriptor;var pe=Object.getOwnPropertyNames;var le=Object.prototype.hasOwnProperty;var N=(r,e)=>{for(var t in e)R(r,t,{get:e[t],enumerable:!0})},ue=(r,e,t,n)=>{if(e&&typeof e=="object"||typeof e=="function")for(let o of pe(e))!le.call(r,o)&&o!==t&&R(r,o,{get:()=>e[o],enumerable:!(n=fe(e,o))||n.enumerable});return r};var we=r=>ue(R({},"__esModule",{value:!0}),r);var Ze={};N(Ze,{CID:()=>F,bytes:()=>P,digest:()=>T,hasher:()=>_,varint:()=>L});var P={};N(P,{coerce:()=>S,empty:()=>ee,equals:()=>J,fromHex:()=>ge,fromString:()=>ye,isBinary:()=>me,toHex:()=>be,toString:()=>xe});var ee=new Uint8Array(0),be=r=>r.reduce((e,t)=>e+t.toString(16).padStart(2,"0"),""),ge=r=>{let e=r.match(/../g);return e?new Uint8Array(e.map(t=>parseInt(t,16))):ee},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},S=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")},me=r=>r instanceof ArrayBuffer||ArrayBuffer.isView(r),ye=r=>new TextEncoder().encode(r),xe=r=>new TextDecoder().decode(r);function ve(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 s=r.charAt(o),i=s.charCodeAt(0);if(t[i]!==255)throw new TypeError(s+" is ambiguous");t[i]=o}var c=r.length,h=r.charAt(0),D=Math.log(c)/Math.log(256),f=Math.log(256)/Math.log(c);function z(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,A=0,l=0,w=a.length;l!==w&&a[l]===0;)l++,d++;for(var b=(w-l)*f+1>>>0,p=new Uint8Array(b);l!==w;){for(var g=a[l],v=0,u=b-1;(g!==0||v<A)&&u!==-1;u--,v++)g+=256*p[u]>>>0,p[u]=g%c>>>0,g=g/c>>>0;if(g!==0)throw new Error("Non-zero carry");A=v,l++}for(var y=b-A;y!==b&&p[y]===0;)y++;for(var k=h.repeat(d);y<b;++y)k+=r.charAt(p[y]);return k}function $(a){if(typeof a!="string")throw new TypeError("Expected String");if(a.length===0)return new Uint8Array;var d=0;if(a[d]!==" "){for(var A=0,l=0;a[d]===h;)A++,d++;for(var w=(a.length-d)*D+1>>>0,b=new Uint8Array(w);a[d];){var p=t[a.charCodeAt(d)];if(p===255)return;for(var g=0,v=w-1;(p!==0||g<l)&&v!==-1;v--,g++)p+=c*b[v]>>>0,b[v]=p%256>>>0,p=p/256>>>0;if(p!==0)throw new Error("Non-zero carry");l=g,d++}if(a[d]!==" "){for(var u=w-l;u!==w&&b[u]===0;)u++;for(var y=new Uint8Array(A+(w-u)),k=A;u!==w;)y[k++]=b[u++];return y}}}function de(a){var d=$(a);if(d)return d;throw new Error(`Non-${e} character`)}return{encode:z,decodeUnsafe:$,decode:de}}var Ae=ve,Se=Ae,te=Se;var j=class{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")}},Q=class{constructor(e,t,n){if(this.name=e,this.prefix=t,t.codePointAt(0)===void 0)throw new Error("Invalid prefix character");this.prefixCodePoint=t.codePointAt(0),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 re(this,e)}},G=class{constructor(e){this.decoders=e}or(e){return re(this,e)}decode(e){let t=e[0],n=this.decoders[t];if(n)return n.decode(e);throw RangeError(`Unable to decode multibase string ${JSON.stringify(e)}, only inputs prefixed with ${Object.keys(this.decoders)} are supported`)}},re=(r,e)=>new G({...r.decoders||{[r.prefix]:r},...e.decoders||{[e.prefix]:e}}),X=class{constructor(e,t,n,o){this.name=e,this.prefix=t,this.baseEncode=n,this.baseDecode=o,this.encoder=new j(e,t,n),this.decoder=new Q(e,t,o)}encode(e){return this.encoder.encode(e)}decode(e){return this.decoder.decode(e)}},ne=({name:r,prefix:e,encode:t,decode:n})=>new X(r,e,t,n),K=({prefix:r,name:e,alphabet:t})=>{let{encode:n,decode:o}=te(t,e);return ne({prefix:r,name:e,encode:n,decode:s=>S(o(s))})},Ee=(r,e,t,n)=>{let o={};for(let f=0;f<e.length;++f)o[e[f]]=f;let s=r.length;for(;r[s-1]==="=";)--s;let i=new Uint8Array(s*t/8|0),c=0,h=0,D=0;for(let f=0;f<s;++f){let z=o[r[f]];if(z===void 0)throw new SyntaxError(`Non-${n} character`);h=h<<t|z,c+=t,c>=8&&(c-=8,i[D++]=255&h>>c)}if(c>=t||255&h<<8-c)throw new SyntaxError("Unexpected end of data");return i},Ce=(r,e,t)=>{let n=e[e.length-1]==="=",o=(1<<t)-1,s="",i=0,c=0;for(let h=0;h<r.length;++h)for(c=c<<8|r[h],i+=8;i>t;)i-=t,s+=e[o&c>>i];if(i&&(s+=e[o&c<<t-i]),n)for(;s.length*t&7;)s+="=";return s},m=({name:r,prefix:e,bitsPerChar:t,alphabet:n})=>ne({prefix:e,name:r,encode(o){return Ce(o,n,t)},decode(o){return Ee(o,n,t,r)}});var O=m({prefix:"b",name:"base32",alphabet:"abcdefghijklmnopqrstuvwxyz234567",bitsPerChar:5}),nt=m({prefix:"B",name:"base32upper",alphabet:"ABCDEFGHIJKLMNOPQRSTUVWXYZ234567",bitsPerChar:5}),ot=m({prefix:"c",name:"base32pad",alphabet:"abcdefghijklmnopqrstuvwxyz234567=",bitsPerChar:5}),st=m({prefix:"C",name:"base32padupper",alphabet:"ABCDEFGHIJKLMNOPQRSTUVWXYZ234567=",bitsPerChar:5}),it=m({prefix:"v",name:"base32hex",alphabet:"0123456789abcdefghijklmnopqrstuv",bitsPerChar:5}),at=m({prefix:"V",name:"base32hexupper",alphabet:"0123456789ABCDEFGHIJKLMNOPQRSTUV",bitsPerChar:5}),ct=m({prefix:"t",name:"base32hexpad",alphabet:"0123456789abcdefghijklmnopqrstuv=",bitsPerChar:5}),ht=m({prefix:"T",name:"base32hexpadupper",alphabet:"0123456789ABCDEFGHIJKLMNOPQRSTUV=",bitsPerChar:5}),dt=m({prefix:"h",name:"base32z",alphabet:"ybndrfg8ejkmcpqxot1uwisza345h769",bitsPerChar:5});var x=K({name:"base58btc",prefix:"z",alphabet:"123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"}),lt=K({name:"base58flickr",prefix:"Z",alphabet:"123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ"});var T={};N(T,{Digest:()=>U,create:()=>M,decode:()=>Z,equals:()=>Y});var L={};N(L,{decode:()=>I,encodeTo:()=>E,encodingLength:()=>C});var Ue=ie,oe=128,De=127,ze=~De,Ie=Math.pow(2,31);function ie(r,e,t){e=e||[],t=t||0;for(var n=t;r>=Ie;)e[t++]=r&255|oe,r/=128;for(;r&ze;)e[t++]=r&255|oe,r>>>=7;return e[t]=r|0,ie.bytes=t-n+1,e}var Me=W,Ne=128,se=127;function W(r,n){var t=0,n=n||0,o=0,s=n,i,c=r.length;do{if(s>=c)throw W.bytes=0,new RangeError("Could not decode varint");i=r[s++],t+=o<28?(i&se)<<o:(i&se)*Math.pow(2,o),o+=7}while(i>=Ne);return W.bytes=s-n,t}var Oe=Math.pow(2,7),Ve=Math.pow(2,14),Le=Math.pow(2,21),Te=Math.pow(2,28),Be=Math.pow(2,35),$e=Math.pow(2,42),ke=Math.pow(2,49),Fe=Math.pow(2,56),qe=Math.pow(2,63),Re=function(r){return r<Oe?1:r<Ve?2:r<Le?3:r<Te?4:r<Be?5:r<$e?6:r<ke?7:r<Fe?8:r<qe?9:10},Je={encode:Ue,decode:Me,encodingLength:Re},Pe=Je,V=Pe;var I=(r,e=0)=>[V.decode(r,e),V.decode.bytes],E=(r,e,t=0)=>(V.encode(r,e,t),e),C=r=>V.encodingLength(r);var M=(r,e)=>{let t=e.byteLength,n=C(r),o=n+C(t),s=new Uint8Array(o+t);return E(r,s,0),E(t,s,n),s.set(e,o),new U(r,t,e,s)},Z=r=>{let e=S(r),[t,n]=I(e),[o,s]=I(e.subarray(n)),i=e.subarray(n+s);if(i.byteLength!==o)throw new Error("Incorrect length");return new U(t,o,i,e)},Y=(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)}},U=class{constructor(e,t,n,o){this.code=e,this.size=t,this.digest=n,this.bytes=o}};var ae=(r,e)=>{let{bytes:t,version:n}=r;switch(n){case 0:return Qe(t,H(r),e||x.encoder);default:return Ge(t,H(r),e||O.encoder)}};var ce=new WeakMap,H=r=>{let e=ce.get(r);if(e==null){let t=new Map;return ce.set(r,t),t}return e},F=class r{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!==Xe)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 ${this.version} to version 1. This is a bug please report`)}}equals(e){return r.equals(this,e)}static equals(e,t){let n=t;return n&&e.code===n.code&&e.version===n.version&&Y(e.multihash,n.multihash)}toString(e){return ae(this,e)}toJSON(){return{"/":ae(this)}}link(){return this}get[Symbol.toStringTag](){return"CID"}[Symbol.for("nodejs.util.inspect.custom")](){return`CID(${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:s,bytes:i}=t;return new r(n,o,s,i||he(n,o,s.bytes))}else if(t[Ke]===!0){let{version:n,multihash:o,code:s}=t,i=Z(o);return r.create(n,s,i)}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: ${B}) block encoding`);return new r(e,t,n,n.bytes)}case 1:{let o=he(e,t,n.bytes);return new r(e,t,n,o)}default:throw new Error("Invalid version")}}static createV0(e){return r.create(0,B,e)}static createV1(e,t){return r.create(1,e,t)}static decode(e){let[t,n]=r.decodeFirst(e);if(n.length)throw new Error("Incorrect length");return t}static decodeFirst(e){let t=r.inspectBytes(e),n=t.size-t.multihashSize,o=S(e.subarray(n,n+t.multihashSize));if(o.byteLength!==t.multihashSize)throw new Error("Incorrect length");let s=o.subarray(t.multihashSize-t.digestSize),i=new U(t.multihashCode,t.digestSize,s,o);return[t.version===0?r.createV0(i):r.createV1(t.codec,i),e.subarray(t.size)]}static inspectBytes(e){let t=0,n=()=>{let[z,$]=I(e.subarray(t));return t+=$,z},o=n(),s=B;if(o===18?(o=0,t=0):s=n(),o!==0&&o!==1)throw new RangeError(`Invalid CID version ${o}`);let i=t,c=n(),h=n(),D=t+h,f=D-i;return{version:o,codec:s,multihashCode:c,digestSize:h,multihashSize:f,size:D}}static parse(e,t){let[n,o]=je(e,t),s=r.decode(o);if(s.version===0&&e[0]!=="Q")throw Error("Version 0 CID string must not include multibase prefix");return H(s).set(n,e),s}},je=(r,e)=>{switch(r[0]){case"Q":{let t=e||x;return[x.prefix,t.decode(`${x.prefix}${r}`)]}case x.prefix:{let t=e||x;return[x.prefix,t.decode(r)]}case O.prefix:{let t=e||O;return[O.prefix,t.decode(r)]}default:{if(e==null)throw Error("To parse non base32 or base58btc encoded CID multibase decoder must be provided");return[r[0],e.decode(r)]}}},Qe=(r,e,t)=>{let{prefix:n}=t;if(n!==x.prefix)throw Error(`Cannot string encode V0 in ${t.name} encoding`);let o=e.get(n);if(o==null){let s=t.encode(r).slice(1);return e.set(n,s),s}else return o},Ge=(r,e,t)=>{let{prefix:n}=t,o=e.get(n);if(o==null){let s=t.encode(r);return e.set(n,s),s}else return o},B=112,Xe=18,he=(r,e,t)=>{let n=C(r),o=n+C(e),s=new Uint8Array(o+t.byteLength);return E(r,s,0),E(e,s,n),s.set(t,o),s},Ke=Symbol.for("@ipld/js-cid/CID");var _={};N(_,{Hasher:()=>q,from:()=>We});var We=({name:r,code:e,encode:t})=>new q(r,e,t),q=class{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 we(Ze);})();
return Multiformats}));