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sevm

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A Symbolic Ethereum Virtual Machine (EVM) bytecode decompiler & analyzer library & CLI

acuarica/evm

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1
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a.next?a.next():[])s.unshift(e)}}exec(e,t){if(this._ids.push(t),t.halted)throw new Error(`State at ${e} must be non-halted to be \`exec\``);const s=[];let a;for(a of this.step.decode(this.bytecode,e)){const[,e,i]=this.step[a.opcode],c={opcode:a};s.push(c);try{t.halted||(this.step[i](t,a,this),c.stack=t.stack.clone())}catch(e){if(!(e instanceof r.ExecError))throw e;const s=new n.Throw(e.message,a);t.halt(s),this.errors.push({err:s,state:t})}if(!e&&this.bytecode[a.nextpc]===o.JUMPDEST){const e=n.Branch.make(a.nextpc,t);t.halted||t.halt(new n.JumpDest(e));break}if(e){if(!t.halted)throw Error("asfdasdf 12123");break}}if(void 0===a)throw new Error(`Executing block at ${e} cannot be empty`);if(!t.halted){const s=new n.Throw(`State must be halted after executing block at ${e}..${a.pc}`,a);t.halt(s),this.errors.push({err:s,state:t})}const i=this.blocks.get(e);void 0===i?this.blocks.set(e,{pcend:a.nextpc,opcodes:s,states:[t]}):i.states.push(t)}opcodes(){if(0===this.blocks.size)throw new Error("`blocks` is empty, call `start`, `run` or `exec` first");return[...this.blocks.values()].flatMap((e=>e.opcodes.map((e=>e.opcode))))}gc(e){const t=this.blocks.get(e.pc);if(void 0!==t)for(const s of t.states)if(c(e.state,s))return s}}function c({stack:e},{stack:t}){const s=(e,t)=>!(e.isVal()&&e.pushStateId&&t.isVal()&&t.pushStateId&&e.val!==t.val);if(e.values.length!==t.values.length)return!1;for(let a=0;a<e.values.length;a++)if(!s(e.values[a],t.values[a]))return!1;return!0}t.EVM=i},326:function(e,t,s){"use strict";var a=this&&this.__createBinding||(Object.create?function(e,t,s,a){void 0===a&&(a=s);var n=Object.getOwnPropertyDescriptor(t,s);n&&!("get"in n?!t.__esModule:n.writable||n.configurable)||(n={enumerable:!0,get:function(){return t[s]}}),Object.defineProperty(e,a,n)}:function(e,t,s,a){void 0===a&&(a=s),e[a]=t[s]}),n=this&&this.__exportStar||function(e,t){for(var s in e)"default"===s||Object.prototype.hasOwnProperty.call(t,s)||a(t,e,s)},r=this&&this.__importDefault||function(e){return e&&e.__esModule?e:{default:e}};Object.defineProperty(t,"__esModule",{value:!0}),t.reduce0=t.build=t.PublicFunction=t.isRevertBlock=t.Contract=t.ERCIds=void 0;const o=s(224),i=s(773),c=s(939),l=s(90),d=r(s(755)),u=s(42),f=s(452),h=s(360),p=s(554);t.ERCIds=Object.keys(d.default);class v{constructor(e,t=new p.Shanghai,s=new h.State){this.events={},this.variables=new Map,this.mappings={},this.functionBranches=new Map,this.reverts={},this.functions={},this.bytecode=(0,l.arrayify)(e);const a=new u.EVM(this.bytecode,t);a.run(0,s),this.main=m(s),this.payable=!w(this.main,!0);for(const[e,t]of a.step.functionBranches)a.run(t.pc,t.state),this.functions[e]=new g(this,m(t.state),e);this.events=a.step.events,this.variables=a.step.variables,this.mappings=a.step.mappings,this.functionBranches=a.step.functionBranches,this.reverts=a.step.reverts,this.metadata=(0,f.splitMetadataHash)(this.bytecode).metadata,this.errors=a.errors,this.blocks=a.blocks,this.chunks=()=>a.chunks(),this.opcodes=()=>a.opcodes()}reduce(){const e=Object.create(v.prototype),t=Object.assign(e,this);t.main=(0,o.reduce)(this.main),t.payable=!w(t.main),t.functions={};for(const[e,s]of Object.entries(this.functions)){const a=new g(t,(0,o.reduce)(s.stmts),e,s.payable);a.label=s.label,t.functions[e]=a}return t}getFunctions(){return Object.values(this.functions).flatMap((e=>void 0===e.label?[]:[e.label]))}getEvents(){return Object.values(this.events).flatMap((e=>void 0===e.sig?[]:[e.sig]))}isERC(e,t=!0){return d.default[e].selectors.every((e=>this.functionBranches.has(e)))&&(!t||d.default[e].topics.every((e=>e in this.events)))}}function b(e){return e.length>=1&&e.slice(0,-1).every((e=>"Local"===e.name||"MStore"===e.name))&&"Revert"===e.at(-1).name&&e.at(-1).isRequireOrAssert()}t.Contract=v,t.isRevertBlock=b;class g{constructor(e,t,s,a){this.contract=e,this.stmts=t,this.selector=s,this._label=void 0,this.returns=[],this.visibility="public",void 0===a?w(this.stmts)?this.payable=!1:e.payable?this.payable=!0:this.payable=!1:this.payable=a,this.constant=1===this.stmts.length&&"Return"===this.stmts[0].name;const n=[];g.findReturns(t,n),n.length>0&&n.every((e=>e.length===n[0].length&&e.map((e=>e.type)).join("")===n[0].map((e=>e.type)).join("")))?n[0].forEach((e=>{e.isVal()?this.returns.push("uint256"):e.type?this.returns.push(e.type):this.returns.push("unknown")})):n.length>0&&this.returns.push("<unknown>")}get label(){return this._label}set label(e){if(this._label=e,void 0!==e){const t=e.split("(")[0];if(this.isGetter()){const e=this.stmts.at(-1).args[0].slot.val,s=this.contract.variables.get(e);void 0!==s?s.label=t:this.contract.variables.set(e,new c.Variable(t,[],this.contract.variables.size+1))}if(this.isMappingGetter()){const e=this.stmts.at(-1).args[0].location;this.contract.mappings[e].name=t}const s=e.replace(t,"").slice(1,-1).split(",");(s.length>1||1===s.length&&""!==s[0])&&this.stmts.forEach((e=>g.patchCallDataLoad(e,s)))}}isGetter(){const e=this.stmts.at(-1);return this.stmts.length>=1&&this.stmts.slice(0,-1).every((e=>"Local"===e.name||"MStore"===e.name||"Require"===e.name))&&"Return"===e.name&&void 0!==e.args&&1===e.args.length&&"SLoad"===e.args[0].tag&&e.args[0].slot.isVal()}isMappingGetter(){const e=this.stmts.find((e=>"Local"!==e.name&&"MStore"!==e.name&&"Require"!==e.name));return void 0!==e&&this.stmts.at(-1)===e&&"Return"===e.name&&void 0!==e.args&&e.args.every((e=>"MappingLoad"===e.tag))}static findReturns(e,t){for(const s of e)"Return"===s.name&&s.args&&s.args.length>0?t.push(s.args):"If"===s.name&&[s.trueBlock,s.falseBlock].forEach((e=>{void 0!==e&&g.findReturns(e,t)}))}static patchCallDataLoad(e,t,s=new Set){if(null!==e&&!s.has(e)){s.add(e);for(const a in e)if("mappings"!==a&&Object.prototype.hasOwnProperty.call(e,a)){const n=e[a];if(n&&"CallDataLoad"===n.tag&&n.location.isVal()){const e=Number((n.location.val-4n)/32n);n.type=t[e]}"object"!=typeof n||n instanceof c.Variable||n instanceof o.Throw||g.patchCallDataLoad(n,t,s)}}}}function m(e){const t=new WeakSet,s=function e(s){if(t.has(s))return[];t.add(s);const a=s.last;if(void 0===a)return[];for(let e=0;e<s.stmts.length;e++);switch(a.name){case"Jumpi":{if(a.evalCond.isVal())return 0n===a.evalCond.val?[...s.stmts.slice(0,-1),...e(a.fallBranch.state)]:[...s.stmts.slice(0,-1),...e(a.destBranch.state)];const t=e(a.destBranch.state),n=e(a.fallBranch.state);return[...s.stmts.slice(0,-1),...b(n)?[new o.Require(a.cond,n.at(-1).selector,n.at(-1).args??[]),...t]:[new o.If(new i.IsZero(a.cond),n),...t]]}case"SigCase":{const t=e(a.fallBranch.state);return[...s.stmts.slice(0,-1),new 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0}}t.Metadata=n,t.splitMetadataHash=function(e){const t=(0,a.arrayify)(e);if(t.length<=2)return{bytecode:t,metadata:void 0};const s=(t.at(-2)<<8)+t.at(-1),r=new Uint8Array(t.subarray(t.length-2-s,t.length-2));if(r.length!==s)return{bytecode:t,metadata:void 0};let o;try{o=function(e){const t=Math.pow(2,-24),s=Math.pow(2,32),a=new DataView(e);let n=0;function r(e,t){return n+=t,e}function o(t){return r(new Uint8Array(e,n,t),t)}const i=()=>r(a.getUint8(n),1),c=()=>r(a.getUint16(n),2),l=()=>r(a.getUint32(n),4);function d(){return 255===a.getUint8(n)&&(n+=1,!0)}function u(e){if(e<24)return e;if(24===e)return i();if(25===e)return c();if(26===e)return l();if(27===e)return l()*s+l();if(31===e)return-1;throw"Invalid length encoding"}function f(e){const t=i();if(255===t)return-1;const s=u(31&t);if(s<0||t>>5!==e)throw"Invalid indefinite length element";return s}function h(e,t){for(let s=0;s<t;++s){let s=i();128&s&&(s<224?(s=(31&s)<<6|63&i(),t-=1):s<240?(s=(15&s)<<12|(63&i())<<6|63&i(),t-=2):(s=(15&s)<<18|(63&i())<<12|(63&i())<<6|63&i(),t-=3)),s<65536?e.push(s):(s-=65536,e.push(55296|s>>10),e.push(56320|1023&s))}}const p=function e(){const s=i(),l=s>>5,p=31&s;let v,b;if(7===l)switch(p){case 25:return function(){const e=new ArrayBuffer(4),s=new DataView(e),a=c(),n=32768&a;let r=31744&a;const o=1023&a;if(31744===r)r=261120;else if(0!==r)r+=114688;else if(0!==o)return o*t;return s.setUint32(0,n<<16|r<<13|o<<13),s.getFloat32(0)}();case 26:return r(a.getFloat32(n),4);case 27:return r(a.getFloat64(n),8)}if(b=u(p),b<0&&(l<2||6<l))throw"Invalid length";switch(l){case 0:return b;case 1:return-1-b;case 2:if(b<0){const e=[];let t=0;for(;(b=f(l))>=0;)t+=b,e.push(o(b));const s=new Uint8Array(t);let a=0;for(v=0;v<e.length;++v)s.set(e[v],a),a+=e[v].length;return s}return o(b);case 3:const t=[];if(b<0)for(;(b=f(l))>=0;)h(t,b);else h(t,b);return String.fromCharCode.apply(null,t);case 4:let s;if(b<0)for(s=[];!d();)s.push(e());else for(s=new Array(b),v=0;v<b;++v)s[v]=e();return s;case 5:const a={};for(v=0;v<b||b<0&&!d();++v)a[e()]=e();return a;case 6:return e();case 7:switch(b){case 20:return!1;case 21:return!0;case 22:return null;default:return}default:throw new Error("Unrecognized major type")}}();if(n!==e.byteLength)throw"Remaining bytes";return p}(r.buffer)}catch{return{bytecode:t,metadata:void 0}}if(null===o||"object"!=typeof o)return{bytecode:t,metadata:void 0};const i=new n;return"ipfs"in o&&o.ipfs instanceof Uint8Array?(i.protocol="ipfs",i.hash=function(e){const t="123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz",s=Array(256).fill(-1);for(let e=0;e<t.length;++e)s[t.charCodeAt(e)]=e;const a=[];for(const n of e){let e=n;for(let n=0;n<a.length;++n){const r=(s[a[n]]<<8)+e;a[n]=t.charCodeAt(r%58),e=r/58|0}for(;e;)a.push(t.charCodeAt(e%58)),e=e/58|0}for(const t of e){if(t)break;a.push("1".charCodeAt(0))}return a.reverse(),String.fromCharCode(...a)}(o.ipfs),delete o.ipfs):"bzzr0"in o&&o.bzzr0 instanceof Uint8Array?(i.protocol="bzzr0",i.hash=(0,a.hexlify)(o.bzzr0),delete o.bzzr0):"bzzr1"in o&&o.bzzr1 instanceof Uint8Array&&(i.protocol="bzzr1",i.hash=(0,a.hexlify)(o.bzzr1),delete o.bzzr1),"solc"in o&&o.solc instanceof Uint8Array&&(i.solc=o.solc.join("."),delete o.solc),{bytecode:t.subarray(0,t.length-2-s),metadata:Object.assign(i,o)}}},989:(e,t,s)=>{"use strict";Object.defineProperty(t,"__esModule",{value:!0}),t.solMappings=t.solStructs=t.solVars=t.solEvents=t.solStmts=t.sol=void 0;const a=s(326),n=s(69),r=s(224),o=s(872);function i(e,...t){const s=[e[0]];return t.forEach(((t,a)=>{const n=(0,r.isExpr)(t)?u(t):(0,r.isInst)(t)?v(t):`${t}`;s.push(n,e[a+1])})),s.join("")}t.sol=i;const c={Add:["+",11],Mul:["*",12],Sub:["-",11],Div:["/",12],Mod:["%",12],Exp:["**",14],Lt:["<",9],Gt:[">",9],Eq:["==",8],And:["&",4],Or:["|",3],Xor:["^",6],Not:["not",14],Byte:["byte",10],Shl:["<<",10],Shr:[">>>",10],Sar:[">>",10]},l=e=>{const t=e.tag;return t in c?c[t][1]:16};function d(e,t){return l(e)<l(t)?i`(${e})`:i`${e}`}function u(e){switch(e.tag){case"Val":return`${e.isJumpDest()?"[J]":""}0x${e.val.toString(16)}`;case"Local":return e.nrefs>0?`local${e.index}`:e.count>=1e3?`/*expression too big to decompile: ${e.count} AST nodes*/local${e.index}`:i`${e.value}`;case"Add":case"Mul":case"Sub":case"Div":case"Mod":case"Exp":case"Eq":case"And":case"Or":case"Xor":return`${d(e.left,e)} ${c[e.tag][0]} ${d(e.right,e)}`;case"Lt":case"Gt":return`${d(e.left,e)} ${c[e.tag][0]}${e.equal?"=":""} ${d(e.right,e)}`;case"IsZero":return"Eq"===e.value.tag?d(e.value.left,e)+" != "+d(e.value.right,e):d(e.value,e)+" == 0";case"Not":return`~${d(e.value,e)}`;case"Byte":return`(${d(e.data,e)} >> ${d(e.pos,e)}) & 1`;case"Shl":case"Shr":case"Sar":return`${d(e.value,e)} ${c[e.tag][0]} ${d(e.shift,e)}`;case"Sig":return`msg.sig == ${e.selector}`;case"CallValue":return"msg.value";case"CallDataLoad":{const t=e.location;return t.isVal()&&0n===t.val?"msg.data":t.isVal()&&(t.val-4n)%32n===0n?"_arg"+(t.val-4n)/32n:i`msg.data[${t}]`}case"Prop":return e.symbol;case"Fn":return o.FNS[e.mnemonic][0](u(e.value));case"DataCopy":switch(e.kind){case"calldatacopy":return i`msg.data[${e.offset}:(${e.offset}+${e.size})]`;case"codecopy":return i`this.code[${e.offset}:(${e.offset}+${e.size})]`;case"extcodecopy":return i`address(${e.address}).code[${e.offset}:(${e.offset}+${e.size})]`;case"returndatacopy":return i`output[${e.offset}:(${e.offset}+${e.size})]`}case"MLoad":return i`memory[${e.location}]`;case"Sha3":return void 0===e.args?i`keccak256(memory[${e.offset}:(${e.offset}+${e.size})])`:`keccak256(${e.args.map(u).join(", ")})`;case"Create":return i`new Contract(memory[${e.offset}..${e.offset}+${e.size}]).value(${e.value}).address`;case"Call":return e.argsLen.isZero()&&e.retLen.isZero()?"Mul"===e.gas.tag&&e.gas.left.isZero()&&e.gas.right.isVal()&&2300n===e.gas.right.val?e.throwOnFail?i`address(${e.address}).transfer(${e.value})`:i`address(${e.address}).send(${e.value})`:i`address(${e.address}).call.gas(${e.gas}).value(${e.value})`:i`call(${e.gas},${e.address},${e.value},${e.argsStart},${e.argsLen},${e.retStart},${e.retLen})`;case"ReturnData":return i`output:ReturnData:${e.retOffset}:${e.retSize}`;case"CallCode":return i`callcode(${e.gas},${e.address},${e.value},${e.memoryStart},${e.memoryLength},${e.outputStart},${e.outputLength})`;case"Create2":return i`new Contract(memory[${e.offset}:(${e.offset}+${e.size})]).value(${e.value}).address`;case"StaticCall":return i`staticcall(${e.gas},${e.address},${e.memoryStart},${e.memoryLength},${e.outputStart},${e.outputLength})`;case"DelegateCall":return i`delegatecall(${e.gas},${e.address},${e.memoryStart},${e.memoryLength},${e.outputStart},${e.outputLength})`;case"SLoad":if(void 0!==e.variable){return e.variable.label||`var_${e.variable.index}`}return i`storage[${e.slot}]`;case"MappingLoad":{let t=`mapping${e.location+1}`;const s=e.mappings[e.location].name;return e.location in e.mappings&&s&&(t=s),e.structlocation?t+e.items.map((e=>i`[${e}]`)).join("")+"["+e.structlocation.toString()+"]":t+e.items.map((e=>"["+u(e)+"]")).join("")}}}function f(e){return 3===e?.length&&e.every((e=>e.isVal()))}function h(e){let t="";for(let s=0;s<e.length&&"00"!==e.slice(s,s+2);s+=2)t+=String.fromCharCode(parseInt(e.substring(s,s+2),16));return