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utils.js
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utils.js
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const crypto = require('crypto');
function calculateSHA256FromHex(hexData) {
const data = hexData.startsWith('0x') ? hexData.substring(2) : data
const hash = crypto.createHash('sha256');
hash.update(Buffer.from(data, 'hex'));
return hash.digest('hex');
}
function kzgCommitmentToVersionedHash(kzgCommitment) {
const kzgCommitmentHash = calculateSHA256FromHex(kzgCommitment);
return '0x01' + kzgCommitmentHash.substring(2);
}
function toQuantity(value) {
return '0x' + BigInt(value).toString(16);
}
function calculateWithdrawals(beaconBlockithdrawals) {
let withdrawals = [];
for (const withdrawal of beaconBlockithdrawals) {
withdrawals.push(
{
index: toQuantity(withdrawal.index),
validatorIndex: toQuantity(withdrawal.validator_index),
address: withdrawal.address,
amount: toQuantity(withdrawal.amount)
}
);
}
return withdrawals;
}
module.exports = {
kzgCommitmentToVersionedHash,
toQuantity,
calculateWithdrawals
};