nostr-fetch/dist/index.mjs

A utility library that allows JS/TS apps to effortlessly fetch past events from Nostr relays

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zero");return{d:fr(r),l:t.subarray(n+2)}},toSig(t){let{Err:e}=ye,n=typeof t=="string"?dr(t):t;Oe(n);let r=n.length;if(r<2||n[0]!=48)throw new e("Invalid signature tag");if(n[1]!==r-2)throw new e("Invalid signature: incorrect length");let{d:o,l:s}=ye._parseInt(n.subarray(2)),{d:i,l:a}=ye._parseInt(s);if(a.length)throw new e("Invalid signature: left bytes after parsing");return{r:o,s:i}},hexFromSig(t){let e=l=>Number.parseInt(l[0],16)&8?"00"+l:l,n=l=>{let p=l.toString(16);return p.length&1?`0${p}`:p},r=e(n(t.s)),o=e(n(t.r)),s=r.length/2,i=o.length/2,a=n(s),c=n(i);return`30${n(i+s+4)}02${c}${o}02${a}${r}`}},J=BigInt(0),D=BigInt(1),ys=BigInt(2),un=BigInt(3),gs=BigInt(4);function hr(t){let e=ur(t),{Fp:n}=e,r=e.toBytes||((E,f,h)=>{let d=f.toAffine();return X(Uint8Array.from([4]),n.toBytes(d.x),n.toBytes(d.y))}),o=e.fromBytes||(E=>{let f=E.subarray(1),h=n.fromBytes(f.subarray(0,n.BYTES)),d=n.fromBytes(f.subarray(n.BYTES,2*n.BYTES));return{x:h,y:d}});function s(E){let{a:f,b:h}=e,d=n.sqr(E),g=n.mul(d,E);return n.add(n.add(g,n.mul(E,f)),h)}if(!n.eql(n.sqr(e.Gy),s(e.Gx)))throw new Error("bad generator point: equation left != right");function i(E){return typeof E=="bigint"&&J<E&&E<e.n}function a(E){if(!i(E))throw new Error("Expected valid bigint: 0 < bigint < curve.n")}function c(E){let{allowedPrivateKeyLengths:f,nByteLength:h,wrapPrivateKey:d,n:g}=e;if(f&&typeof E!="bigint"){if(ae(E)&&(E=de(E)),typeof E!="string"||!f.includes(E.length))throw new Error("Invalid key");E=E.padStart(h*2,"0")}let R;try{R=typeof E=="bigint"?E:U(K("private key",E,h))}catch{throw new Error(`private key must be ${h} bytes, hex or bigint, not ${typeof E}`)}return d&&(R=M(R,g)),a(R),R}let l=new Map;function p(E){if(!(E instanceof u))throw new Error("ProjectivePoint expected")}class u{constructor(f,h,d){if(this.px=f,this.py=h,this.pz=d,f==null||!n.isValid(f))throw new Error("x required");if(h==null||!n.isValid(h))throw new Error("y required");if(d==null||!n.isValid(d))throw new Error("z required")}static fromAffine(f){let{x:h,y:d}=f||{};if(!f||!n.isValid(h)||!n.isValid(d))throw new Error("invalid affine point");if(f instanceof u)throw new Error("projective point not allowed");let g=R=>n.eql(R,n.ZERO);return g(h)&&g(d)?u.ZERO:new u(h,d,n.ONE)}get x(){return this.toAffine().x}get y(){return this.toAffine().y}static normalizeZ(f){let h=n.invertBatch(f.map(d=>d.pz));return f.map((d,g)=>d.toAffine(h[g])).map(u.fromAffine)}static fromHex(f){let h=u.fromAffine(o(K("pointHex",f)));return h.assertValidity(),h}static fromPrivateKey(f){return u.BASE.multiply(c(f))}_setWindowSize(f){this._WINDOW_SIZE=f,l.delete(this)}assertValidity(){if(this.is0()){if(e.allowInfinityPoint&&!n.is0(this.py))return;throw new Error("bad point: ZERO")}let{x:f,y:h}=this.toAffine();if(!n.isValid(f)||!n.isValid(h))throw new Error("bad point: x or y not FE");let d=n.sqr(h),g=s(f);if(!n.eql(d,g))throw new Error("bad point: equation left != 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u(w,m,b)}add(f){p(f);let{px:h,py:d,pz:g}=this,{px:R,py:T,pz:w}=f,m=n.ZERO,b=n.ZERO,O=n.ZERO,F=e.a,k=n.mul(e.b,un),B=n.mul(h,R),q=n.mul(d,T),A=n.mul(g,w),H=n.add(h,d),y=n.add(R,T);H=n.mul(H,y),y=n.add(B,q),H=n.sub(H,y),y=n.add(h,g);let S=n.add(R,w);return y=n.mul(y,S),S=n.add(B,A),y=n.sub(y,S),S=n.add(d,g),m=n.add(T,w),S=n.mul(S,m),m=n.add(q,A),S=n.sub(S,m),O=n.mul(F,y),m=n.mul(k,A),O=n.add(m,O),m=n.sub(q,O),O=n.add(q,O),b=n.mul(m,O),q=n.add(B,B),q=n.add(q,B),A=n.mul(F,A),y=n.mul(k,y),q=n.add(q,A),A=n.sub(B,A),A=n.mul(F,A),y=n.add(y,A),B=n.mul(q,y),b=n.add(b,B),B=n.mul(S,y),m=n.mul(H,m),m=n.sub(m,B),B=n.mul(H,q),O=n.mul(S,O),O=n.add(O,B),new u(m,b,O)}subtract(f){return this.add(f.negate())}is0(){return this.equals(u.ZERO)}wNAF(f){return v.wNAFCached(this,l,f,h=>{let d=n.invertBatch(h.map(g=>g.pz));return h.map((g,R)=>g.toAffine(d[R])).map(u.fromAffine)})}multiplyUnsafe(f){let h=u.ZERO;if(f===J)return h;if(a(f),f===D)return this;let{endo:d}=e;if(!d)return v.unsafeLadder(this,f);let{k1neg:g,k1:R,k2neg:T,k2:w}=d.splitScalar(f),m=h,b=h,O=this;for(;R>J||w>J;)R&D&&(m=m.add(O)),w&D&&(b=b.add(O)),O=O.double(),R>>=D,w>>=D;return g&&(m=m.negate()),T&&(b=b.negate()),b=new u(n.mul(b.px,d.beta),b.py,b.pz),m.add(b)}multiply(f){a(f);let h=f,d,g,{endo:R}=e;if(R){let{k1neg:T,k1:w,k2neg:m,k2:b}=R.splitScalar(h),{p:O,f:F}=this.wNAF(w),{p:k,f:B}=this.wNAF(b);O=v.constTimeNegate(T,O),k=v.constTimeNegate(m,k),k=new u(n.mul(k.px,R.beta),k.py,k.pz),d=O.add(k),g=F.add(B)}else{let{p:T,f:w}=this.wNAF(h);d=T,g=w}return u.normalizeZ([d,g])[0]}multiplyAndAddUnsafe(f,h,d){let g=u.BASE,R=(w,m)=>m===J||m===D||!w.equals(g)?w.multiplyUnsafe(m):w.multiply(m),T=R(this,h).add(R(f,d));return T.is0()?void 0:T}toAffine(f){let{px:h,py:d,pz:g}=this,R=this.is0();f==null&&(f=R?n.ONE:n.inv(g));let T=n.mul(h,f),w=n.mul(d,f),m=n.mul(g,f);if(R)return{x:n.ZERO,y:n.ZERO};if(!n.eql(m,n.ONE))throw new Error("invZ was 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He(y,r)}let{ProjectivePoint:l,normPrivateKeyToScalar:p,weierstrassEquation:u,isWithinCurveOrder:x}=hr({...e,toBytes(y,S,C){let I=S.toAffine(),N=n.toBytes(I.x),_=X;return C?_(Uint8Array.from([S.hasEvenY()?2:3]),N):_(Uint8Array.from([4]),N,n.toBytes(I.y))},fromBytes(y){let S=y.length,C=y[0],I=y.subarray(1);if(S===o&&(C===2||C===3)){let N=U(I);if(!i(N))throw new Error("Point is not on curve");let _=u(N),V;try{V=n.sqrt(_)}catch(z){let te=z instanceof Error?": "+z.message:"";throw new Error("Point is not on curve"+te)}let $=(V&D)===D;return(C&1)===1!==$&&(V=n.neg(V)),{x:N,y:V}}else if(S===s&&C===4){let N=n.fromBytes(I.subarray(0,n.BYTES)),_=n.fromBytes(I.subarray(n.BYTES,2*n.BYTES));return{x:N,y:_}}else throw new Error(`Point of length ${S} was invalid. 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S=U(y),C=y.length*8-e.nBitLength;return C>0?S>>BigInt(C):S},b=e.bits2int_modN||function(y){return a(m(y))},O=Ne(e.nBitLength);function F(y){if(typeof y!="bigint")throw new Error("bigint expected");if(!(J<=y&&y<O))throw new Error(`bigint expected < 2^${e.nBitLength}`);return Z(y,e.nByteLength)}function k(y,S,C=B){if(["recovered","canonical"].some(ue=>ue in C))throw new Error("sign() legacy options not supported");let{hash:I,randomBytes:N}=e,{lowS:_,prehash:V,extraEntropy:$}=C;_==null&&(_=!0),y=K("msgHash",y),V&&(y=K("prehashed msgHash",I(y)));let ee=b(y),z=p(S),te=[F(z),F(ee)];if($!=null&&$!==!1){let ue=$===!0?N(n.BYTES):$;te.push(K("extraEntropy",ue))}let Be=X(...te),ne=ee;function ft(ue){let ve=m(ue);if(!x(ve))return;let $t=c(ve),G=l.BASE.multiply(ve).toAffine(),we=a(G.x);if(we===J)return;let Ke=a($t*a(ne+we*z));if(Ke===J)return;let Wt=(G.x===we?0:2)|Number(G.y&D),Ht=Ke;return _&&E(Ke)&&(Ht=f(Ke),Wt^=1),new d(we,Ht,Wt)}return{seed:Be,k2sig:ft}}let B={lowS:e.lowS,prehash:!1},q={lowS:e.lowS,prehash:!1};function A(y,S,C=B){let{seed:I,k2sig:N}=k(y,S,C),_=e;return yt(_.hash.outputLen,_.nByteLength,_.hmac)(I,N)}l.BASE._setWindowSize(8);function H(y,S,C,I=q){let N=y;if(S=K("msgHash",S),C=K("publicKey",C),"strict"in I)throw new Error("options.strict was renamed to lowS");let{lowS:_,prehash:V}=I,$,ee;try{if(typeof N=="string"||ae(N))try{$=d.fromDER(N)}catch(G){if(!(G instanceof ye.Err))throw G;$=d.fromCompact(N)}else if(typeof N=="object"&&typeof N.r=="bigint"&&typeof N.s=="bigint"){let{r:G,s:we}=N;$=new d(G,we)}else throw new Error("PARSE");ee=l.fromHex(C)}catch(G){if(G.message==="PARSE")throw new Error("signature must be Signature instance, Uint8Array or hex string");return!1}if(_&&$.hasHighS())return!1;V&&(S=e.hash(S));let{r:z,s:te}=$,Be=b(S),ne=c(te),ft=a(Be*ne),ue=a(z*ne),ve=l.BASE.multiplyAndAddUnsafe(ee,ft,ue)?.toAffine();return ve?a(ve.x)===z:!1}return{CURVE:e,getPublicKey:R,getSharedSecret:w,sign:A,verify:H,ProjectivePoint:l,Signature:d,utils:g}}var De=class extends xe{constructor(e,n){super(),this.finished=!1,this.destroyed=!1,zt(e);let r=Ae(n);if(this.iHash=e.create(),typeof this.iHash.update!="function")throw new Error("Expected instance of class which extends utils.Hash");this.blockLen=this.iHash.blockLen,this.outputLen=this.iHash.outputLen;let o=this.blockLen,s=new Uint8Array(o);s.set(r.length>o?e.create().update(r).digest():r);for(let i=0;i<s.length;i++)s[i]^=54;this.iHash.update(s),this.oHash=e.create();for(let i=0;i<s.length;i++)s[i]^=106;this.oHash.update(s),s.fill(0)}update(e){return Se(this),this.iHash.update(e),this}digestInto(e){Se(this),fe(e,this.outputLen),this.finished=!0,this.iHash.digestInto(e),this.oHash.update(e),this.oHash.digestInto(e),this.destroy()}digest(){let e=new Uint8Array(this.oHash.outputLen);return 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${o}`)}};function Ce(t,e,n){return r=>t(r)?{severity:"none"}:{severity:e,msg:n}}function Ee(t,e,n){return r=>t(r).length!==0?{severity:"none"}:{severity:e,msg:n}}function _t(t,e){return n=>{let{since:r,until:o}=t(n);return r===void 0||o===void 0?{severity:"none"}:r<=o?{severity:"none"}:{severity:e,msg:"Invalid time range (since > until)"}}}function Fe(t,e){return n=>{let r=Object.keys(t(n)).filter(o=>o.startsWith("#")&&!et(o));return r.length>0?{severity:e,msg:`Filter has invalid tag queries: ${r.join(", ")}`}:{severity:"none"}}}var at=(t,e)=>t.created_at!==e.created_at?e.created_at-t.created_at:t.id<e.id?-1:t.id>e.id?1:0,Fn=(t,e)=>{switch(t){case"ids":return[e.id];case"authors":return[e.pubkey];case"kinds":return[e.kind]}let n=e.tags.filter(r=>r[0]===t.charAt(1)).map(r=>r[1]??"");return[...new Set(n)]},ot=class{#e;#t;constructor(e,n){this.#e=new Map(e.map(r=>[r,[]])),this.#t=n}getBucket(e){return this.#e.get(e)}add(e,n){let r=this.#e.get(e);return r===void 0?(console.error(`bucket not found for key: ${e}`),{state:"dropped"}):r.length>=this.#t?{state:"dropped"}:(r.push(n),r.length===this.#t?{state:"fulfilled",events:r}:{state:"open"})}calcKeysAndLimitForNextReq(){return[...this.#e.entries()].reduce(({keys:e,limit:n},[r,o])=>{let s=o.length;return{keys:s<this.#t?[...e,r]:e,limit:n+(this.#t-s)}},{keys:[],limit:0})}},it=class{#e;#t;constructor(e,n){this.#e=new Map;let r=[...new Set([...e.values()].flat())];this.#t=new Map(r.map(o=>[o,[]]));for(let[o,s]of e)for(let i of s){let a=n();this.#e.set(this.#n(i,o),a),this.#t.get(i)?.push(a)}}#n(e,n){return`${e}|${n}`}get(e,n){return this.#e.get(this.#n(e,n))}itemsByKey(e){return this.#t.get(e)}},qt=t=>{let e=new AbortController;if(t===void 0)return[e.signal,()=>e.abort()];if(AbortSignal.any!==void 0)return[AbortSignal.any([t,e.signal]),()=>e.abort()];let n=()=>{e.abort()};return t.addEventListener("abort",n,{once:!0}),e.signal.addEventListener("abort",()=>{t.removeEventListener("abort",n)}),[e.signal,()=>e.abort()]},Kt=class{#e=new Map;#t;constructor(e){e.minLogLevel!=="none"&&(this.#t=new Q(e.minLogLevel))}async relaySupportsNips(e,n){let r=this.#t?.subLogger(e);if(n.length===0)return!0;let o=this.#e.get(e);if(o!==void 0)return n.every(i=>o.has(i));let s=await kn(e);return r?.log("info",`supported NIPs: ${s}`),this.#e.set(e,s),n.every(i=>s.has(i))}},Ut=t=>new Kt(t),ct=t=>t?new Mt:new Pt,Mt=class{#e=new Map;report(e,n){let r=this.#e.get(e.id);return r!==void 0?{hasSeen:!0,seenOn:[...r.add(n)]}:(this.#e.set(e.id,new Set([n])),{hasSeen:!1,seenOn:[n]})}getSeenOn(e){return[...this.#e.get(e)??[]]}},Pt=class{#e=new Set;report(e,n){return this.#e.has(e.id)?{hasSeen:!0,seenOn:void 0}:(this.#e.add(e.id),{hasSeen:!1,seenOn:void 0})}getSeenOn(e){return[]}},ke=class t{#e={progress:{max:1,current:0},counts:{fetchedEvents:0,bufferedEvents:0,openedSubs:0,runningSubs:0}};#t=performance.now();#n=new Map;#s;#o;constructor(e,n){this.#s=e,this.#o=setInterval(()=>{this.#s(this.#r())},n)}#r(){return{...this.#e,elapsedTimeMs:performance.now()-this.#t,relays:Object.fromEntries(this.#n)}}static init(e,n){return e!==void 0?new t(e,n):void 0}setProgressMax(e){this.#e.progress.max=Math.max(e,1)}addProgress(e){this.#e.progress.current+=e}setCurrentProgress(e){this.#e.progress.current=e}eventFetched(e){this.#e.counts.fetchedEvents++;let n=this.#n.get(e);n!==void 0&&n.numFetchedEvents++}setNumBufferedEvents(e){this.#e.counts.bufferedEvents=e}subOpened(){this.#e.counts.openedSubs++,this.#e.counts.runningSubs++}subClosed(){this.#e.counts.runningSubs--}initRelayStats(e,n,r){let o=new Set(n),s=ge(e).filter(c=>!o.has(c));console.log(e,n,s);let i=n.map(c=>[c,{status:"fetching",numFetchedEvents:0,frontier:r}]),a=s.map(c=>[c,{status:"connection-failed",numFetchedEvents:0,frontier:0}]);this.#n=new Map([...i,...a])}setRelayStatus(e,n){let r=this.#n.get(e);r!==void 0&&(r.status=n)}setRelayFrontier(e,n){let r=this.#n.get(e);r!==void 0&&(r.frontier=n)}stop(){this.#o!==void 0&&clearInterval(this.#o),this.#s(this.#r())}},Le=class{#e;constructor(e){this.#e=new Map(e.map(n=>[n,0]))}addProgress(e,n){let r=this.#e.get(e)??0;this.#e.set(e,r+n)}setProgress(e,n){this.#e.set(e,n)}calcTotalProgress(){return[...this.#e.values()].reduce((e,n)=>e+n)}};var ut=5e3,qr=500,Ur=5e3,Vt={eventVerifier:Sn,skipVerification:!1,skipFilterMatching:!1,withSeenOn:!1,statsListener:void 0,statsNotifIntervalMs:1e3,connectTimeoutMs:5e3,signal:void 0,abortSignal:void 0,abortSubBeforeEoseTimeoutMs:1e4,limitPerReq:ut},Vr={...Vt,enableBackpressure:!1},$r={...Vt,sort:!1},lt={...Vt,asOf:void 0,reduceVerification:!1},Wr=t=>"relayUrls"in t&&"keys"in t,Hr=t=>Symbol.iterator in Object(t),Dr=t=>"relayUrls"in t&&"authors"in t,zr=t=>Symbol.iterator in Object(t),Kn=t=>{if(Dr(t))return{keys:t.authors,relayUrls:t.relayUrls};if(zr(t))return t;throw Error("adaptAuthorsAndRelays: unreachable")},Mn=class t{#e;#t;#n;constructor(e,n,r){this.#e=e,this.#t=n,r.minLogLevel!=="none"&&(this.#n=new Q(r.minLogLevel))}static