Ysopwnable
7af7bc88ce
* feat(evm): inspect offline bytecode interfaces through evmole * fix(evm): distinguish unsupported bytecode targets * style(evm): format verifier string-prefix checks
27 lines
1.0 KiB
TypeScript
27 lines
1.0 KiB
TypeScript
/** Expected carrier encoding failure, independent of the analysis engine. */
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export class EvmCarrierFailure extends Error {}
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/** Decode only the explicitly selected representation; source carrier bytes are retained separately. */
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export const decodeEvmBytecodeCarrier = (
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bytes: Uint8Array,
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encoding: "raw" | "hex",
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): Uint8Array => {
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if (encoding === "raw") return Uint8Array.from(bytes);
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let text: string;
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try {
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text = new TextDecoder("utf-8", { fatal: true, ignoreBOM: true }).decode(
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bytes,
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);
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} catch (cause: unknown) {
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throw new EvmCarrierFailure("Hex carrier must be valid UTF-8.", { cause });
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}
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const code = text
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.replace(/^[\x09-\x0d\x20]+|[\x09-\x0d\x20]+$/g, "")
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.replace(/^0x/i, "");
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if (!/^(?:[a-fA-F0-9]{2})*$/.test(code))
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throw new EvmCarrierFailure(
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"Hex carrier requires complete hexadecimal byte pairs, an optional 0x prefix and outer ASCII whitespace; interior separators are invalid.",
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);
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return Uint8Array.from(Buffer.from(code, "hex"));
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};
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