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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| /// <reference types="ses" /> | ||
|
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| lockdown({ | ||
| // In production, we have CSP enforced no eval | ||
| // In development, we use Trusted Types. | ||
| evalTaming: 'unsafeEval', | ||
| // | ||
| overrideTaming: 'severe', | ||
| consoleTaming: 'unsafe', | ||
| errorTaming: 'unsafe', | ||
| }) | ||
| try { | ||
| // Frozen extra globals | ||
| ;(() => { | ||
| delete globalThis.regeneratorRuntime | ||
| /** | ||
| * @param {string} name The global name to be protected | ||
| * @param {'accept' | 'ignore'} policy The global policy | ||
| * @param {boolean} freeze If the value should be frozen | ||
| * @param {boolean} warn If should log a warning when accessed | ||
| * @param {boolean} why If should trigger the debugger on set | ||
| */ | ||
| function global(name, policy = 'accept', freeze = true, warn = false, why = false) { | ||
| const old = Object.getOwnPropertyDescriptor(globalThis, name) | ||
| if (old) { | ||
| if (!old.configurable) return console.warn('globalThis.' + name + ' is not configurable.') | ||
| Reflect.deleteProperty(globalThis, name) | ||
| if (old.get) return console.warn('Cannot harden a global getter', name) | ||
|
|
||
| if (policy === 'accept') { | ||
| const { value } = old | ||
| if (freeze) harden(value) | ||
| if (warn) { | ||
| Object.defineProperty(globalThis, name, { | ||
| get() { | ||
| console.warn(`[Deprecation] Try to access globalThis.${name}`) | ||
| return value | ||
| }, | ||
| }) | ||
| } else { | ||
| old.configurable = false | ||
| old.writable = false | ||
| Object.defineProperty(globalThis, name, old) | ||
| } | ||
| } | ||
| return | ||
| } | ||
|
|
||
| let value | ||
| let hasBeenSet = false | ||
| Object.defineProperty(globalThis, name, { | ||
| get() { | ||
| if (warn) console.warn(`[Deprecation] Try to access globalThis.${name}`) | ||
| return value | ||
| }, | ||
| set(val) { | ||
| if (why) debugger | ||
| if (policy === 'ignore') return | ||
|
|
||
| if (hasBeenSet) throw new TypeError(`globalThis.${name} is not writable.`) | ||
| hasBeenSet = true | ||
| value = val | ||
| if (freeze) harden(val) | ||
| return true | ||
| }, | ||
| }) | ||
| } | ||
|
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||
| // accepted globals | ||
| global('Buffer') // by webpack | ||
| global('elliptic') // required by secp256k1 polyfill | ||
| global('regeneratorRuntime') // require by generator/async transpiled by babel | ||
| global('__EMOTION_REACT_11__', 'ignore') // by @emotion/react to avoid duplicate loading | ||
| global('_', 'ignore') // by lodash, as UMD | ||
|
|
||
| // to be investigated globals | ||
| global('Arweave', 'accept', false) // by arweave | ||
| global('FCL_REGISTRY', 'accept', false) // by @onflow/util-actor < @portto/sdk < @blocto/fcl | ||
| global('Web3', 'accept', false) // by web3 | ||
| global('iFrameResize', 'accept', false) // by https://github.com/davidjbradshaw/iframe-resizer-react | ||
| global('proto', 'accept', false) // by @blocto/protobuf < @portto/sdk < @blocto/fcl | ||
| global('_ethers', 'accept', false) // by RSS3 | ||
| })() | ||
| } catch (error) { | ||
| console.log('Lockdown failed', error) | ||
| } | ||
|
|
||
| // completion value | ||
| null |
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