convert-bech32-address-browser.js

/*!
 * https://github.com/jasbanza/convert-bech32-address
 *
 * Zero dependancy bech32 address converter, in javascript for browsers.
 * Derives an address with a custom prefix, from a source BIP32 HD wallet address
 *
 * @author   jasbanza
 * @license  MIT
 *
 * Adapted from snippets from the following MIT licensed sources:
 *
 *    address functions:
 *    https://github.com/chainapsis/cosmosjs/blob/a2888c8b2d5f63064b67704de46e554ad755f495/src/common/address.ts
 *
 *    buffer dependancy:
 *    https://github.com/feross/buffer/blob/master/index.js
 *
 *    bech32 functions:
 *    https://raw.githubusercontent.com/bitcoinjs/bech32/605655d6b37a782345549cd1388db688a96ad56f/dist/index.js
 */

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t>>>=0,e||checkOffset(t,4,this.length),this[t]|this[t+1]<<8|this[t+2]<<16|this[t+3]<<24},Buffer.prototype.readInt32BE=function(t,e){return t>>>=0,e||checkOffset(t,4,this.length),this[t]<<24|this[t+1]<<16|this[t+2]<<8|this[t+3]},Buffer.prototype.readBigInt64LE=defineBigIntMethod(function(t){validateNumber(t>>>=0,"offset");const e=this[t],r=this[t+7];void 0!==e&&void 0!==r||boundsError(t,this.length-8);const n=this[t+4]+256*this[t+5]+65536*this[t+6]+(r<<24);return(BigInt(n)<<BigInt(32))+BigInt(e+256*this[++t]+65536*this[++t]+this[++t]*2**24)}),Buffer.prototype.readBigInt64BE=defineBigIntMethod(function(t){validateNumber(t>>>=0,"offset");const e=this[t],r=this[t+7];void 0!==e&&void 0!==r||boundsError(t,this.length-8);const n=(e<<24)+65536*this[++t]+256*this[++t]+this[++t];return(BigInt(n)<<BigInt(32))+BigInt(this[++t]*2**24+65536*this[++t]+256*this[++t]+r)}),Buffer.prototype.readFloatLE=function(t,e){return t>>>=0,e||checkOffset(t,4,this.length),ieee754.read(this,t,!0,23,4)},Buffer.prototype.readFloatBE=function(t,e){return t>>>=0,e||checkOffset(t,4,this.length),ieee754.read(this,t,!1,23,4)},Buffer.prototype.readDoubleLE=function(t,e){return t>>>=0,e||checkOffset(t,8,this.length),ieee754.read(this,t,!0,52,8)},Buffer.prototype.readDoubleBE=function(t,e){return t>>>=0,e||checkOffset(t,8,this.length),ieee754.read(this,t,!1,52,8)},Buffer.prototype.writeUintLE=Buffer.prototype.writeUIntLE=function(t,e,r,n){if(t=+t,e>>>=0,r>>>=0,!n){checkInt(this,t,e,r,Math.pow(2,8*r)-1,0)}let f=1,o=0;for(this[e]=255&t;++o<r&&(f*=256);)this[e+o]=t/f&255;return e+r},Buffer.prototype.writeUintBE=Buffer.prototype.writeUIntBE=function(t,e,r,n){if(t=+t,e>>>=0,r>>>=0,!n){checkInt(this,t,e,r,Math.pow(2,8*r)-1,0)}let f=r-1,o=1;for(this[e+f]=255&t;--f>=0&&(o*=256);)this[e+f]=t/o&255;return e+r},Buffer.prototype.writeUint8=Buffer.prototype.writeUInt8=function(t,e,r){return t=+t,e>>>=0,r||checkInt(this,t,e,1,255,0),this[e]=255&t,e+1},Buffer.prototype.writeUint16LE=Buffer.prototype.writeUInt16LE=function(t,e,r){return t=+t,e>>>=0,r||checkInt(this,t,e,2,65535,0),this[e]=255&t,this[e+1]=t>>>8,e+2},Buffer.prototype.writeUint16BE=Buffer.prototype.writeUInt16BE=function(t,e,r){return t=+t,e>>>=0,r||checkInt(this,t,e,2,65535,0),this[e]=t>>>8,this[e+1]=255&t,e+2},Buffer.prototype.writeUint32LE=Buffer.prototype.writeUInt32LE=function(t,e,r){return t=+t,e>>>=0,r||checkInt(this,t,e,4,4294967295,0),this[e+3]=t>>>24,this[e+2]=t>>>16,this[e+1]=t>>>8,this[e]=255&t,e+4},Buffer.prototype.writeUint32BE=Buffer.prototype.writeUInt32BE=function(t,e,r){return t=+t,e>>>=0,r||checkInt(this,t,e,4,4294967295,0),this[e]=t>>>24,this[e+1]=t>>>16,this[e+2]=t>>>8,this[e+3]=255&t,e+4},Buffer.prototype.writeBigUInt64LE=defineBigIntMethod(function(t,e=0){return wrtBigUInt64LE(this,t,e,BigInt(0),BigInt("0xffffffffffffffff"))}),Buffer.prototype.writeBigUInt64BE=defineBigIntMethod(function(t,e=0){return wrtBigUInt64BE(this,t,e,BigInt(0),BigInt("0xffffffffffffffff"))}),Buffer.prototype.writeIntLE=function(t,e,r,n){if(t=+t,e>>>=0,!n){const n=Math.pow(2,8*r-1);checkInt(this,t,e,r,n-1,-n)}let f=0,o=1,i=0;for(this[e]=255&t;++f<r&&(o*=256);)t<0&&0===i&&0!==this[e+f-1]&&(i=1),this[e+f]=(t/o>>0)-i&255;return e+r},Buffer.prototype.writeIntBE=function(t,e,r,n){if(t=+t,e>>>=0,!n){const n=Math.pow(2,8*r-1);checkInt(this,t,e,r,n-1,-n)}let f=r-1,o=1,i=0;for(this[e+f]=255&t;--f>=0&&(o*=256);)t<0&&0===i&&0!==this[e+f+1]&&(i=1),this[e+f]=(t/o>>0)-i&255;return e+r},Buffer.prototype.writeInt8=function(t,e,r){return t=+t,e>>>=0,r||checkInt(this,t,e,1,127,-128),t<0&&(t=255+t+1),this[e]=255&t,e+1},Buffer.prototype.writeInt16LE=function(t,e,r){return t=+t,e>>>=0,r||checkInt(this,t,e,2,32767,-32768),this[e]=255&t,this[e+1]=t>>>8,e+2},Buffer.prototype.writeInt16BE=function(t,e,r){return t=+t,e>>>=0,r||checkInt(this,t,e,2,32767,-32768),this[e]=t>>>8,this[e+1]=255&t,e+2},Buffer.prototype.writeInt32LE=function(t,e,r){return t=+t,e>>>=0,r||checkInt(this,t,e,4,2147483647,-2147483648),this[e]=255&t,this[e+1]=t>>>8,this[e+2]=t>>>16,this[e+3]=t>>>24,e+4},Buffer.prototype.writeInt32BE=function(t,e,r){return t=+t,e>>>=0,r||checkInt(this,t,e,4,2147483647,-2147483648),t<0&&(t=4294967295+t+1),this[e]=t>>>24,this[e+1]=t>>>16,this[e+2]=t>>>8,this[e+3]=255&t,e+4},Buffer.prototype.writeBigInt64LE=defineBigIntMethod(function(t,e=0){return wrtBigUInt64LE(this,t,e,-BigInt("0x8000000000000000"),BigInt("0x7fffffffffffffff"))}),Buffer.prototype.writeBigInt64BE=defineBigIntMethod(function(t,e=0){return wrtBigUInt64BE(this,t,e,-BigInt("0x8000000000000000"),BigInt("0x7fffffffffffffff"))}),Buffer.prototype.writeFloatLE=function(t,e,r){return writeFloat(this,t,e,!0,r)},Buffer.prototype.writeFloatBE=function(t,e,r){return writeFloat(this,t,e,!1,r)},Buffer.prototype.writeDoubleLE=function(t,e,r){return writeDouble(this,t,e,!0,r)},Buffer.prototype.writeDoubleBE=function(t,e,r){return writeDouble(this,t,e,!1,r)},Buffer.prototype.copy=function(t,e,r,n){if(!Buffer.isBuffer(t))throw new TypeError("argument should be a Buffer");if(r||(r=0),n||0===n||(n=this.length),e>=t.length&&(e=t.length),e||(e=0),n>0&&n<r&&(n=r),n===r)return 0;if(0===t.length||0===this.length)return 0;if(e<0)throw new RangeError("targetStart out of bounds");if(r<0||r>=this.length)throw new RangeError("Index out of range");if(n<0)throw new RangeError("sourceEnd out of bounds");n>this.length&&(n=this.length),t.length-e<n-r&&(n=t.length-e+r);const f=n-r;return this===t&&"function"==typeof Uint8Array.prototype.copyWithin?this.copyWithin(e,r,n):Uint8Array.prototype.set.call(t,this.subarray(r,n),e),f},Buffer.prototype.fill=function(t,e,r,n){if("string"==typeof t){if("string"==typeof e?(n=e,e=0,r=this.length):"string"==typeof r&&(n=r,r=this.length),void 0!==n&&"string"!=typeof n)throw new TypeError("encoding must be a string");if("string"==typeof n&&!Buffer.isEncoding(n))throw new TypeError("Unknown encoding: "+n);if(1===t.length){const e=t.charCodeAt(0);("utf8"===n&&e<128||"latin1"===n)&&(t=e)}}else"number"==typeof t?t&=255:"boolean"==typeof t&&(t=Number(t));if(e<0||this.length<e||this.length<r)throw new RangeError("Out of range index");if(r<=e)return this;let f;if(e>>>=0,r=void 0===r?this.length:r>>>0,t||(t=0),"number"==typeof t)for(f=e;f<r;++f)this[f]=t;else{const o=Buffer.isBuffer(t)?t:Buffer.from(t,n),i=o.length;if(0===i)throw new TypeError('The value "'+t+'" is invalid for argument "value"');for(f=0;f<r-e;++f)this[f+e]=o[f%i]}return this};const errors={};function E(t,e,r){errors[t]=class extends r{constructor(){super(),Object.defineProperty(this,"message",{value:e.apply(this,arguments),writable:!0,configurable:!0}),this.name=`${this.name} [${t}]`,this.stack,delete this.name}get code(){return t}set code(t){Object.defineProperty(this,"code",{configurable:!0,enumerable:!0,value:t,writable:!0})}toString(){return`${this.name} [${t}]: ${this.message}`}}}function addNumericalSeparator(t){let e="",r=t.length;const n="-"===t[0]?1:0;for(;r>=n+4;r-=3)e=`_${t.slice(r-3,r)}${e}`;return`${t.slice(0,r)}${e}`}function checkBounds(t,e,r){validateNumber(e,"offset"),void 0!==t[e]&&void 0!==t[e+r]||boundsError(e,t.length-(r+1))}function checkIntBI(t,e,r,n,f,o){if(t>r||t<e){const n="bigint"==typeof e?"n":"";let f;throw f=o>3?0===e||e===BigInt(0)?`>= 0${n} and < 2${n} ** ${8*(o+1)}${n}`:`>= -(2${n} ** ${8*(o+1)-1}${n}) and < 2 ** `+`${8*(o+1)-1}${n}`:`>= ${e}${n} and <= ${r}${n}`,new errors.ERR_OUT_OF_RANGE("value",f,t)}checkBounds(n,f,o)}function validateNumber(t,e){if("number"!=typeof t)throw new errors.ERR_INVALID_ARG_TYPE(e,"number",t)}function boundsError(t,e,r){if(Math.floor(t)!==t)throw validateNumber(t,r),new errors.ERR_OUT_OF_RANGE(r||"offset","an integer",t);if(e<0)throw new errors.ERR_BUFFER_OUT_OF_BOUNDS;throw new errors.ERR_OUT_OF_RANGE(r||"offset",`>= ${r?1:0} and <= ${e}`,t)}E("ERR_BUFFER_OUT_OF_BOUNDS",function(t){return t?`${t} is outside of buffer bounds`:"Attempt to access memory outside buffer bounds"},RangeError),E("ERR_INVALID_ARG_TYPE",function(t,e){return`The "${t}" argument must be of type number. Received type ${typeof e}`},TypeError),E("ERR_OUT_OF_RANGE",function(t,e,r){let n=`The value of "${t}" is out of range.`,f=r;return Number.isInteger(r)&&Math.abs(r)>2**32?f=addNumericalSeparator(String(r)):"bigint"==typeof r&&(f=String(r),(r>BigInt(2)**BigInt(32)||r<-(BigInt(2)**BigInt(32)))&&(f=addNumericalSeparator(f)),f+="n"),n+=` It must be ${e}. Received ${f}`},RangeError);const INVALID_BASE64_RE=/[^+/0-9A-Za-z-_]/g;function base64clean(t){if((t=(t=t.split("=")[0]).trim().replace(INVALID_BASE64_RE,"")).length<2)return"";for(;t.length%4!=0;)t+="=";return t}function utf8ToBytes(t,e){let r;e=e||1/0;const n=t.length;let f=null;const o=[];for(let i=0;i<n;++i){if((r=t.charCodeAt(i))>55295&&r<57344){if(!f){if(r>56319){(e-=3)>-1&&o.push(239,191,189);continue}if(i+1===n){(e-=3)>-1&&o.push(239,191,189);continue}f=r;continue}if(r<56320){(e-=3)>-1&&o.push(239,191,189),f=r;continue}r=65536+(f-55296<<10|r-56320)}else f&&(e-=3)>-1&&o.push(239,191,189);if(f=null,r<128){if((e-=1)<0)break;o.push(r)}else if(r<2048){if((e-=2)<0)break;o.push(r>>6|192,63&r|128)}else if(r<65536){if((e-=3)<0)break;o.push(r>>12|224,r>>6&63|128,63&r|128)}else{if(!(r<1114112))throw new Error("Invalid code point");if((e-=4)<0)break;o.push(r>>18|240,r>>12&63|128,r>>6&63|128,63&r|128)}}return o}function asciiToBytes(t){const e=[];for(let r=0;r<t.length;++r)e.push(255&t.charCodeAt(r));return e}function utf16leToBytes(t,e){let r,n,f;const o=[];for(let i=0;i<t.length&&!((e-=2)<0);++i)n=(r=t.charCodeAt(i))>>8,f=r%256,o.push(f),o.push(n);return o}function base64ToBytes(t){return base64.toByteArray(base64clean(t))}function blitBuffer(t,e,r,n){let f;for(f=0;f<n&&!(f+r>=e.length||f>=t.length);++f)e[f+r]=t[f];return f}function isInstance(t,e){return t instanceof e||null!=t&&null!=t.constructor&&null!=t.constructor.name&&t.constructor.name===e.name}function numberIsNaN(t){return t!=t}const hexSliceLookupTable=function(){const t=new Array(256);for(let e=0;e<16;++e){const r=16*e;for(let n=0;n<16;++n)t[r+n]="0123456789abcdef"[e]+"0123456789abcdef"[n]}return t}();function defineBigIntMethod(t){return"undefined"==typeof BigInt?BufferBigIntNotDefined:t}function BufferBigIntNotDefined(){throw new Error("BigInt not supported")}const ALPHABET="qpzry9x8gf2tvdw0s3jn54khce6mua7l",ALPHABET_MAP={};for(let t=0;t<ALPHABET.length;t++){const e=ALPHABET.charAt(t);ALPHABET_MAP[e]=t}function polymodStep(t){const e=t>>25;return(33554431&t)<<5^996825010&-(e>>0&1)^642813549&-(e>>1&1)^513874426&-(e>>2&1)^1027748829&-(e>>3&1)^705979059&-(e>>4&1)}function prefixChk(t){let e=1;for(let r=0;r<t.length;++r){const n=t.charCodeAt(r);if(n<33||n>126)return"Invalid prefix ("+t+")";e=polymodStep(e)^n>>5}e=polymodStep(e);for(let r=0;r<t.length;++r){const n=t.charCodeAt(r);e=polymodStep(e)^31&n}return e}function convert(t,e,r,n){let f=0,o=0;const i=(1<<r)-1,u=[];for(let n=0;n<t.length;++n)for(f=f<<e|t[n],o+=e;o>=r;)o-=r,u.push(f>>o&i);if(n)o>0&&u.push(f<<r-o&i);else{if(o>=e)return"Excess padding";if(f<<r-o&i)return"Non-zero padding"}return u}function toWords(t){return convert(t,8,5,!0)}function fromWordsUnsafe(t){const e=convert(t,5,8,!1);if(Array.isArray(e))return e}function fromWords(t){const e=convert(t,5,8,!1);if(Array.isArray(e))return e;throw new Error(e)}function getLibraryFromEncoding(t){let e;function r(t,r){if(r=r||90,t.length<8)return t+" too short";if(t.length>r)return"Exceeds length limit";const n=t.toLowerCase(),f=t.toUpperCase();if(t!==n&&t!==f)return"Mixed-case string "+t;const o=(t=n).lastIndexOf("1");if(-1===o)return"No separator character for "+t;if(0===o)return"Missing prefix for "+t;const i=t.slice(0,o),u=t.slice(o+1);if(u.length<6)return"Data too short";let s=prefixChk(i);if("string"==typeof s)return s;const c=[];for(let t=0;t<u.length;++t){const e=u.charAt(t),r=ALPHABET_MAP[e];if(void 0===r)return"Unknown character "+e;s=polymodStep(s)^r,t+6>=u.length||c.push(r)}return s!==e?"Invalid checksum for "+t:{prefix:i,words:c}}return e="bech32"===t?1:734539939,{decodeUnsafe:function(t,e){const n=r(t,e);if("object"==typeof n)return n},decode:function(t,e){const n=r(t,e);if("object"==typeof n)return n;throw new Error(n)},encode:function(t,r,n){if(n=n||90,t.length+7+r.length>n)throw new TypeError("Exceeds length limit");let f=prefixChk(t=t.toLowerCase());if("string"==typeof f)throw new Error(f);let o=t+"1";for(let t=0;t<r.length;++t){const e=r[t];if(e>>5!=0)throw new Error("Non 5-bit word");f=polymodStep(f)^e,o+=ALPHABET.charAt(e)}for(let t=0;t<6;++t)f=polymodStep(f);f^=e;for(let t=0;t<6;++t){const e=f>>5*(5-t)&31;o+=ALPHABET.charAt(e)}return o},toWords:toWords,fromWordsUnsafe:fromWordsUnsafe,fromWords:fromWords}}var bech32=getLibraryFromEncoding("bech32");function fromBech32(t,e=null){if(""===e)throw new Error("Empty bech32 prefix");const{prefix:r,words:n}=bech32.decode(t);if(null!=e&&r!==e)throw new Error("Prefix doesn't match");return{from:bech32.fromWords(n),prefix:null!=e?e:r}}function toBech32(t,e=null){if(!e)throw new Error("Empty bech32 prefix");var r=bech32.toWords(Buffer.from(t));return bech32.encode(e,r)}function lookup(t,e){return toBech32(fromBech32(t).from,e)}