@openocean.finance/widget-sdk/src/_esm/core/EVM/permits/signPermit2Message.js

OpenOcean Any-to-Any Cross-Chain-Swap SDK

import { keccak256 } from 'viem';
import { signTypedData } from 'viem/actions';
import { getAction } from 'viem/utils';
import { getPermitTransferFromValues } from './getPermitTransferFromValues.js';
import { getPermitData } from './signatureTransfer.js';
export async function signPermit2Message(params) {
    const { client, chain, tokenAddress, amount, data, witness } = params;
    const permitTransferFrom = await getPermitTransferFromValues(client, chain, tokenAddress, amount);
    // Create witness data for the OpenOcean call
    const _witness = witness
        ? {
            witness: {
                diamondAddress: chain.diamondAddress,
                diamondCalldataHash: keccak256(data),
            },
            witnessTypeName: 'OpenOceanCall',
            witnessType: {
                OpenOceanCall: [
                    { name: 'diamondAddress', type: 'address' },
                    { name: 'diamondCalldataHash', type: 'bytes32' },
                ],
            },
        }
        : undefined;
    const permitData = getPermitData(permitTransferFrom, chain.permit2, chain.id, _witness);
    const primaryType = witness
        ? 'PermitWitnessTransferFrom'
        : 'PermitTransferFrom';
    const signature = await getAction(client, signTypedData, 'signTypedData')({
        account: client.account,
        primaryType,
        domain: permitData.domain,
        types: permitData.types,
        message: permitData.message,
    });
    return {
        ...permitData,
        primaryType,
        signature,
    };
}
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