packages/contracts/migrations/5_transfer_ownership.ts


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import { Artifacts } from '../util/artifacts';
import { ContractInstance } from '../util/types';
const { TokenTransferProxy, MultiSigWalletWithTimeLock, TokenRegistry } = new Artifacts(artifacts);

let tokenRegistry: ContractInstance;
module.exports = (deployer: any, network: string) => {
    if (network !== 'development') {
        deployer.then(async () => {
            return Promise.all([TokenTransferProxy.deployed(), TokenRegistry.deployed()])
                .then((instances: ContractInstance[]) => {
                    let tokenTransferProxy: ContractInstance;
                    [tokenTransferProxy, tokenRegistry] = instances;
                    return tokenTransferProxy.transferOwnership(MultiSigWalletWithTimeLock.address);
                })
                .then(() => {
                    return tokenRegistry.transferOwnership(MultiSigWalletWithTimeLock.address);
                });
        });
    }
};