| 1 | import { secp256k1 } from '@noble/curves/secp256k1';
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| 2 | import { bnToU8a, hasBigInt, u8aConcat } from '@polkadot/util';
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| 3 | import { isReady, secp256k1Expand as wasm } from '@polkadot/wasm-crypto';
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| 4 | import { BN_BE_256_OPTS } from '../bn.js';
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| 5 | export function secp256k1Expand(publicKey, onlyJs) {
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| 6 | if (![33, 65].includes(publicKey.length)) {
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| 7 | throw new Error(`Invalid publicKey provided, received ${publicKey.length} bytes input`);
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| 8 | }
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| 9 | if (publicKey.length === 65) {
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| 10 | return publicKey.subarray(1);
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| 11 | }
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| 12 | if (!hasBigInt || (!onlyJs && isReady())) {
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| 13 | return wasm(publicKey).subarray(1);
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| 14 | }
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| 15 | const { px, py } = secp256k1.ProjectivePoint.fromHex(publicKey);
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| 16 | return u8aConcat(bnToU8a(px, BN_BE_256_OPTS), bnToU8a(py, BN_BE_256_OPTS));
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| 17 | }
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