@lifi/sdk
Version:
LI.FI Any-to-Any Cross-Chain-Swap SDK
34 lines • 1.21 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.isNativePermitValid = void 0;
const isNativePermitValid = (permit, typedData) => {
if (permit.primaryType !== 'Permit') {
return false;
}
if (Number(permit.domain.chainId) !== Number(typedData.domain.chainId) ||
(permit.domain.salt && permit.domain.salt !== typedData.domain.salt)) {
return false;
}
const message = permit.message;
if (!message) {
return false;
}
if (message.spender?.toLowerCase() !== typedData.message.spender?.toLowerCase()) {
return false;
}
if (message.owner?.toLowerCase() !== typedData.message.owner?.toLowerCase()) {
return false;
}
const permitAmount = BigInt(message.value || 0);
if (permitAmount < BigInt(typedData.message.value || 0)) {
return false;
}
const deadlineTimestamp = parseInt(message.deadline || 0, 10);
const allowedTimestamp = Math.floor(Date.now() / 1000) + 5 * 60;
if (deadlineTimestamp <= allowedTimestamp) {
return false;
}
return true;
};
exports.isNativePermitValid = isNativePermitValid;
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