(cid:1) Suk ū k on blockchain: a legal, regulatory and Shar ī ’ ah review

Purpose – This paper aims to explore issues arising from (cid:1) suk ū k (Islamic bonds) on blockchain, including Shar ī ʾ ah(Islamic law) andlegal matters. Design/methodology/approach – A qualitative methodology is used in conducting this research where relevant literature on (cid:1) suk ū k was reviewed. Through a doctrinal approach, the paper presents analyses on the practice of (cid:1) suk ū k and (cid:1) suk ū k on blockchain by discussing its legal, Shar ī ʾ ah and regulatory issues. This culminates in a conceptualanalysisof blockchain (cid:1) suk ū k anditspeculiarchallenges. Findings – This paper reveals that digitizing (cid:1) suk ū k issuance through blockchain remedies certain inef ﬁ ciencies associated with (cid:1) suk ū k transactions. Indeed, structuring (cid:1) suk ū k on a blockchain platform can increase transparency of underlying (cid:1) suk ū k assets andcash ﬂ ows in addition to reducing costs and thenumber of intermediaries in (cid:1) suk ū k transactions. The paper likewise brings to light legal, regulatory, Shar ī ʾ ah and cyber risks associated with (cid:1) suk ū k on blockchain that confront investors, practitioners and regulators. This calls for deeper collaboration in research among Shar ī ʾ ah scholars, lawyers, regulators and information technologyexperts. Research As a pioneering subject, the paper notes the prospects of blockchain (cid:1) suk ū k and the current dearth of literature on it. The paper would Practical implications – Blockchain (cid:1) suk ū k will assist in addressing issues inherent in classical (cid:1) suk ū k and in paving the way to innovative solutions that will facilitate and enhance the quality of (cid:1) suk ū k transactions. For that, (cid:1) suk ū k wouldrequireappropriateregulatorytechnologytoaddressitsgovernanceandregulationpeculiarities. Originality/value – Integrating (cid:1) suk ū k with blockchain technology will add valueto it. Thepaper advancesthe ideathatblockchain (cid:1) suk ū k revolutionises (cid:1) suk ū k andenhancesitspracticeagainstknowninadequacies.

Introduction Á Sukūk, often referred to as Islamic bonds, is linguistically the plural of the Arabic word " Á sakk" which, from a finance perspective, refers to a certificate or document that evidences a transaction, specifying the right, obligations and conditions of contracting parties thereto (ISRA, 2017). According to the Securities Commission Malaysia, Á sukūk are defined as "certificates of equal value evidencing undivided ownership or investment in asset(s) using Sharīʾah principles and concepts endorsed by the Sharīʾah Advisory Council" (Securities Commission Malaysia, 2014, p. 5). The Accounting and Auditing Organisation for Islamic Financial Institutions (AAOIFI) uses similar criteria to define Á sukūk in its Sharīʾah standards as: [. . .] certificates of equal value representing undivided shares in the ownership of tangible assets, usufructs and services or (in the ownership of) the assets of particular projects or special investment activity (AAOIFI, 2017, p. 468).
In accordance with what Á sukūk is commonly assumed to be, some authors have loosely defined Á sukūk as "financial instruments similar to bonds and shares that are compliant with Islamic law" (Zolfaghari, 2017, p. 5). It is evident from the generality of the formal definitions that, unlike a share or bond, Á sukūk should represent some ownership of tangible assets, services, usufructs, or of assets of certain special investment activities or particular projects. Accordingly, Á sukūk are governed by principles and rules of Sharīʾah which must be complied with at all times, including the prohibition of rib a (interest) (Latham and Watkins LLP, 2017). As such, in a Á sukūk transaction, profit is generated from a Sharīʾah-compliant transaction such as selling an asset or leasing an asset or by entering into a profit-and-loss sharing Sharīʾah-compliant business activity. In contrast, the relationship between a bondholder and bond issuer in a conventional bond is generally based on a loan contract with interest, which is considered rib a from a Sharīʾah perspective. Another principle is that the underlying Á sukūk assets must be Sharīʾah-compliant which means that a Á sukūk transaction cannot deal with Sharīʾah-prohibited activities such as gambling and the selling of alcohol. Furthermore, maysir (speculation), gharar (uncertainty) and jah alah (ignorance of essential information about the contract's subject matter) are prohibited in all Á sukūk transactions. Á Sukūk are said to have originated from business practices of the classical Islamic era (700-1300 AD) where financial obligations related to commercial and trading activities were recorded on paper in accordance with the provisions of the Qurʾ an (2:282). This particular Qurʾ anic verse sanctions and encourages contracts to be established in writing. In contemporary times, the International Islamic Fiqh Academy of the Organisation of Islamic Cooperation issued a statement in 1988 which is considered the basis for the formulation of Á sukūk, wherein it held: [A]ny combination of assets (or the usufruct of such assets) can be represented in the form of written financial instruments which can be sold at a market price provided that the composition of the groups of assets represented by the Á sukūk consist of a majority of tangible assets (Latham and Watkins LLP, 2017, p. 2).
The emergence of Industry 4.0 or the Fourth Industrial Revolution marks a technological transformation that is altering the way work is done as well as interrelationships with one another generally (Schwab, 2016). Its impact will extend to the regulation and governance of all activities or dealings that leverage on technology. Financial instruments are being rapidly transformed by technological innovation, and linking Á sukūk with blockchain is one area that is being explored (Blossom Finance, 2019). Currently, however, limited literature is available on blockchain-based Á sukūk. There is therefore a need to explore the modus operandi of such Á sukūk issuances/ operations and the challenges facing their development.
Findings by existing academic and professional works have affirmed Á sukūk as a technical instrument whose processes are not only sophisticated but intricate, engaging numerous entities and requiring much expertise, which entails significant costs (Sole, 2008;Securities Commission Malaysia, 2009a;Nazar, 2011;Zakariaa et al., 2012;Saeed and Salah, 2014;ISRA, 2015;Nagano, 2016;Tasnia et al., 2017;AAOIFI, 2017;Murugiah, 2018;Zolfaghari, 2017;Al-Ali, 2019;Paltrinieri et al., 2020;Balli et al., 2020). Due to the issues of sophistication and cost, issuance of Á sukūk is a complex and expensive task such that Á sukūk remains a financing instrument issued by sovereigns and large entities. Even so, Á sukūk issuances have grown in many countries owing to the success of Á sukūk as an instrument to finance public expenditure as well as funding businesses.
Most existing legal research on Á sukūk was undertaken to understand or expedite the development and workings of Á sukūk in their extant framework with regard to compliance to developing Islamic capital market principles (Usmani, 2007;Majid et al., 2011;Bouheraoua et al., 2012;Lahsasna, 2014;Safari et al., 2014;ISRA, 2017;Alzahrani, 2019;Busari, 2019;Khawaja et al., 2020;Abd Majid et al., 2020;IFSB, 2020). The use of technology to address issues such as transparency, simplicity and high costs of Á sukūk appears to be largely beyond the scope of existing works.
With the emergence of the digitization of Islamic financial services, particularly the structuring and issuance of Á sukūk via blockchain technology, the need arises to review and analyse such Á sukūk in the light of legal, regulatory and Sharīʾah parameters. This appears unexplored in existing works. The potential of technology for innovative solutions to make Á sukūk simple, efficient and affordable is huge; hence, the need for relevant stakeholders to understand blockchain Á sukūk. This study would come in handy in this regard, thereby filling the gap in existing works.
The objectives of the paper are first to review existing literature. Second, the paper will identify possible legal, regulatory, Sharīʾah and other challenges that blockchain Á sukūk may face in practice. The research objectives are collectively premised upon the following research questions that would ultimately be answered by the research: RQ1. What are blockchain Á sukūk in contrast to classical Á sukūk?
A qualitative research methodology that encompasses three approaches was employed in attaining these objectives: exploratory study, descriptive and doctrinal analyses (Hutchinson, 2015). Principally focusing on library and online databases, explorative study and descriptive analysis were carried out where primary and secondary data sources À mainly regulatory guidelines, articles and textbooks À were examined and analysed in elucidating the subject of Á sukūk and blockchain (Mayer, 2015). Further, through a doctrinal approach, content analysis was conducted through careful study of the data from the identified sources to present issues that would be encountered in implementing blockchain Á sukūk (Cownie and Bradney, 2013).
The paper is divided into five sections. Following the introduction, second section two is on understanding Á sukūk. This section reviews Á sukūk, its nature and its inherent risks. The section also elucidates blockchain and its application in Á sukūk. The third section explains blockchain-based Á sukūk and the modus operandi of some pioneer initiatives. The fourth section identifies and examines potential legal, regulatory, Sharīʾah and other challenges that blockchain Á sukūk will face, whereas the fifth section offers some recommendations and direction for future research. The sixth section concludes the paper.
Understanding Á sukūk As a financing and investment instrument, Á sukūk are issued by public and private enterprises including governments, multilateral development agencies, multinational corporations and other corporate bodies. Á Sukūk have gained traction in national and international markets alike and have been issued in almost every region of the world to fund various public and private projects. Á Sukūk issued by national governments are known as sovereign Á sukūk while corporate Á sukūk involve a corporate entity (state-owned or private) as the issuer. Á Sukūk issued by multilateral bodies are, on the other hand, referred to as supranational Á sukūk. Constituent governments in a federation, i.e. state governments, also issue Á sukūk that are known as sub-sovereign Á sukūk (Safari et al., 2014;Nagano, 2016;Alzahrani, 2019).
The global Á sukūk market comprising all Á sukūk issuances, both domestic and international (corporate and sovereign), recorded 22.2% growth in 2019, with total Á sukūk outstanding increasing from US$444.8bn in 2018 to US$543.4bn in 2019 (IFSB, 2020, pp. 6, 12). These figures are testimonies of Á sukūk growth and its acceptability among investors and seekers of funds to finance developmental projects in both the public and private domains. Moreover, Á sukūk have been issued and traded in both Muslim-majority and non-Muslim majority nations (Hassan et al., 2019).
In everyday usage, Á sukūk are often called Islamic bonds or Islamic investment certificates, having been developed as an Islamic alternative to bonds. Bonds are generally evidence of debt from issuers to investors. The repayment of a simple bond consists of the loan capital (principal) plus interest. Since loans cannot receive any increase in Sharīʾah, bonds are not permissible (ISRA, 2009). Moreover, as a genre of Islamic securities, referring to Á sukūk as "Islamic bonds" does not adequately cover the substance and nature of Á sukūk. For, unlike bonds, Á sukūk holders are considered to be part owners regardless of the underlying Islamic financial contract upon which the Á sukūk are structured (Saeed and Salah, 2014). Thus, to avoid interest and also ensure that investors obtain a return on their investments, a variety of Sharīʾah contracts are used for the purpose of structuring and issuing Á sukūk in consideration of the Á sukūk's Sharīʾah-compliant underlying assets. In fact, AAOIFI(2017) mentions 14 types of Sharīʾah structures in Á sukūk securitization. Á Sukūk are structured to effect the investor or Á sukūk holder's acquisition of undivided beneficial ownership of the underlying Á sukūk assets (Securities Commission Malaysia, 2009a). As beneficial owners, holders of Á sukūk accrue profits and losses generated from the Á sukūk's underlying assets and have a right to proceeds obtained from the sale of the Á sukūk assets (Securities Commission Malaysia, 2009a). Accordingly, Á sukūk are "hybrid" financial instruments with characteristics of bonds and shares (Securities Commission Malaysia, 2009a). An underlying asset is a requirement of every Á sukūk structure and, based on the Á Sukūk on blockchain extent of ownership rights over such asset, the nature of Á sukūk is determined as either asset-based or asset-backed. Á Sukūk are said to be asset-based when their holders depend on an obligor alone for payments of the principal and profits. Therefore, in the event of default, holders of such Á sukūk do not have recourse to the underlying assets and are thus considered unsecured creditors of the obligor. However, asset-backed Á sukūk are secured by the assets as in a conventional asset-backed security (Securities Commission Malaysia, 2009b).
In a standard traditional Á sukūk structure, a number of parties are required to enable proper transfer of assets, assure protection of the rights of investors and ensure compliance with relevant regulations throughout the Á sukūk tenor. Thus, in a standard Á sukūk issuance, the following parties, inter alia, will be present: the issuer, typically a special purpose vehicle (SPV) that issues Á sukūk and protects the underlying assets for the Á sukūk holders; Á sukūk holders, who are the owners of the Á sukūk; the obligor, who is in need of funding and is responsible for paying the Á sukūk holders; Sharīʾah advisors, who ensure Sharīʾah compliance of the Á sukūk structure; the regulator, that is the approving body for the capital market; legal advisors, who ensure the structure is legally sound; an investment bank, either individually or as part of a group, that acts as the lead arranger, rating advisor, book runner or lead manager who underwrites and arranges the offering and advises the obligor; and a facility agent that manages the operational aspects of the Á sukūk structure (COMCEC, 2018, p. 23).
Depending on several factors, the structure of each Á sukūk is bespoke. These factors include economic objectives of the obligor, nature of the underlying asset, credit rating of the obligor, the jurisdiction's legal framework and implication of the tax regime on the structure of the Á sukūk (ISRA, 2009) ( Figure 1). Like any other financial product, there are risks associated with Á sukūk that need to be understood. Risk has generally been defined as "the possibility that the outcome of an event could result in an adverse result" and in the context of finance "risk refers to the probable loss of income and asset value" (Ismail, 2010, p. 227). Á Sukūk are exposed to a number of risks, for example market risk, Sharīʾah non-compliance risk, legal risk and default risk (Financial Islam, 2020;Lahsasna, 2014;Al-Ali, 2019). Furthermore, different kind of Á sukūk structures are underpinned by unique Sharīʾah contracts which have their own unique risks as well (Alswaidan et al., 2017). Each class of such risks portends the likelihood of suffering unfavourable consequences in any transaction in which the risk occurs. Each class may encompass other sub-class of risks. More on risks in relation to blockchain Á sukūk will be discussed below.
Blockchain technology and its application in Á sukūk Blockchain is a distributed or peer-to-peer [1] public or private ledger that consists of "blocks" maintained by a distributed computer network which contains multiple verified transaction records without a central authority or third-party intermediary (Allen, 2017). The blockchain comprises three essential elements: a transaction, record of the transaction, and a system for verification and storage of the transaction. Therefore, the blockchain is constituted of transaction records in a shared database system which operates as a historical public ledger where each and every transaction conducted and distributed on the system is verified by unanimity of a majority of participating parties therein. The records on the blockchain are designed to be immutable and so impossible to alter or erase. The blockchain maintains a certain and provable account of every single transaction ever conducted on it (Allen, 2017). Overall, blockchain technology is in essence a combination of three concepts: distributed ledger, cryptography and smart contracts (Muneeza and Mustapha, 2019). Blockchain technology has not been commonly used for capital market instruments; however, this trend has begun to change.
Many people mistakenly equate blockchain technology with digital currencies such as Bitcoin. Actually, blockchain is the technology used in Bitcoin and other digital currencies' transactions that use a distributed payment protocol. It can be used for other applications as well (Nakamoto, 2008;Dula and Chuen, 2017). The idea of issuing bonds on it has already been successfully tried, as explained by Andreas (2019) and Elasrag (2019). The case of Nivaura's Control Bond and Experimental Bond, as explained in Cohen et al. (2018), is an example in this regard. Applications for it can also be found in Islamic finance, and some are discussed below.

Idea of Á
sukūk on blockchain Blockchain Á sukūk is a novel concept in the world today. A simple way of describing such Á sukūk is that it is a financial instrument where the blockchain technology is used via smart contracts to execute functions in a transparent and reliable manner. There would be no difference in the underlying Sharīʾah contracts used to set up blockchain-based Á sukūk and classical Á sukūk. The difference lies with the use of technology (blockchain technology) in structuring and executing the contracts whereby business rules are directly encoded into an In a blockchain Á sukūk, the Á sukūk issuance process is digitised (Blossom Finance, 2019). Operationally, the blockchain automates and applies rules of contract with regard to payment and ownership transfer, enabled by a smart contracts algorithm which encrypts business rules and parties' agreement where investments are made through digital tokens or currency (Blossom Finance, 2019; Wethaq, 2019). The blockchain platform enables standardisation of the Á sukūk structure and eliminates some of the parties from a traditional Á sukūk issuance, thus reducing execution risks, reducing costs, and increasing transparency of underlying assets and cash flows (Murugiah, 2018). It also ensures better traceability of funds against specific assets since all records would be documented in the blockchain (Shaikh and Zaka, 2019).
Thus, in the blockchain version of a Á sukūk, the papers (trust certificates) issued to primary subscribers and investors are distributed to them as tokens (crypto), which represent their portion/ownership of the underlying asset and/or dividend payment (Mohamed, 2019). The process becomes much leaner and less cumbersome in the following ways: due diligence verification is done via new innovative credit insights from nontraditional sources, through electronic know-your-customer and identity of issuing shareholders; rating of Á sukūk based on an assessment of the issuer and asset is done via automated market valuation methods; Sharīʾah compliance and assessment are done by an automated artificial intelligence-driven review process; and legal terms and allocation of dividends/payments are done via smart contracts.
There are different modules integrated within the blockchain Á sukūk platform Therefore, the platform facilitating the offering of the blockchain Á sukūk is critical. The platform needs to be run by credible, trustworthy personnel apart from the blockchain element to provide confidence, as it enables trust and enforceability within its systems of processes and accountability (Mohamed, 2019). As such, the intervention of a regulatory authority is important to regulate and authorise platforms to provide confidence in the platform to the users. There is the possibility for regulatory technology (regtech) to play a role in this respect.
Globally, to date, there have been reports of research and limited use of blockchain in the issuance of Á sukūk. An example is Al Hilal Bank's US$500m Senior Sukuk (Albawaba, 2019 Blossom Finance's SmartSukuk mobilizes and pulls funds together from investors in consideration for SmartSukuk tokens signifying ownership of undivided assets of the Á sukūk (Blossom Finance, 2019). Once the issuer effects payments, the money is automatically shared and allocated among the SmartSukuk token holders through the blockchain in accordance with the smart contract rules so that the need for intermediaries is significantly diminished. The tokens for the SmartSukuk are compatible with an industry standard protocolthe ERC20based on the Ethereum smart contract. This standard enables tokens to be exchanged and/or traded worldwide on different public digital currency exchanges (Blossom Finance, 2019).
As the Blossom Finance SmartSukuk uses a Á sukūk structure with no involvement of intermediaries for fund transfer, transaction costs are reduced. It is essential to note that in this structure, not all intermediaries involved in the Á sukūk transaction will be eliminated; only the intermediaries [3] used to transfer funds. It is also important to note that Blossom Finance specialises in microfinance and that the blockchain SmartSukuk TM it issued using the Ethereum platform was for microfinance (Esteves, 2019).
Blossom Finance has set up two contractual mechanisms for its Á sukūk on the blockchain (Whitehead, 2019). For the issuance of the first Á sukūk, which is a Á sukūk mu Á d arabah structured on profit-sharing principles, funds were collected and invested in a venture capital firm -PBMT Social Venturesas the issuer of the Á sukūk. The issuer finances microfinance co-operatives which provide funding to small scale businesses including farming and homegrown or local convenience stores. Income generated from financed activities are remitted to the fund and shared among investors. As a regulated entity under the Financial Services Authority of Indonesia, PMBT maintains a Sharīʾah review board that oversees the mu Á d arabah agreement as well as the underlying financing activities of the firm (Blossom Finance, 2019). The second Á sukūk is structured as Á sukūk al-isti Á sn aʿ wa al-ij arah or asset-based lease Á sukūk. However, even though the technology is ready, no funds have yet been mobilised for the Á sukūk. Blossom Finance is said to be at the moment evaluating potential issuers of the second Á sukūk, which would be used to finance projects such as construction of a hospital. Upon completion, the hospital and its facilities would be leased out at a profit by the Á sukūk's investors to an operator of the hospital (Blossom Finance, 2019).
Other recent developments in blockchain Á sukūk include the following two initiatives: (1) In July 2018, a partnership between Curiositas (a technology research and development company) and Dubai-based ArabianChain Technology developed a digital platform by means of smart contracts together with legal automation. The platform is designed for Islamic capital markets, particularly investment banks and financial institutions, for the purpose of issuing Á sukūk ranging in size from US $1m to US$10m (Whitehead, 2019).
(2) In November 2018, blockchain was used to conduct a secondary market transaction in Abu Dhabi for the US$500m Senior Á Sukūk of Al Hilal Bank, which is to mature in September 2023. This was said to be the first instance in the world of using blockchain to execute a segment of a Á sukūk transaction (Albawaba, 2019). Jibrel Network, which had partnered with Al Hilal Bank in the debut blockchainbased Á sukūk trading in the secondary market, announced its partnership with Al Hilal Bank and Abu Dhabi Global Market in January 2019 in the creation of a stateof-the-art Á sukūk (Jibrel, 2019). According to Jibrel (2019), the partnership ushered in smart Á sukūk that automate and standardize legal and accounting requirements as well as payment disbursement of traditional Á sukūk offerings. Enabled by smart regulation, participating entities are able to verify and share from one identical source (a single blockchain), and updates are automatically provided on each Á sukūk with respect to its ownership status and the condition of its underlying asset. In a single view, the blockchain updates and provides records that are enforced via consensus mechanisms. Figure 2 illustrates the infrastructure that Jibrel used to issue Á sukūk.

Á
Sukūk on blockchain Jibrel (2019) further explains that there are six ways in which reorganisation of the management of multiparty activities in its blockchain improves issuance and trading of Á sukūk. First is in the efficiencies of clearing and settlement processes of securities, whereby blockchain helps institutions save thousands of dollars in back office and operational costs. Second is in the reduction of risk exposure, particularly with respect to settlement, which is lowered by more than 99%, bringing down costs dramatically. With settlement occurring in real time, counterparty risk is dispelled as well. Third is the reduction of issuance cost because of removal of superfluous intermediaries and the associated fees involved. Consequently, the operational risks and administrative burden of the traditional Á sukūk issuance, which is often a manual and multi-tiered process, are lessened. Fourth is the relatively low cost of creating the blockchain system and of its continued application, not only to render transactions faster but cheaper too. Fifth is the 24/7 uptime and availability of the system with absolute replication among participants on the network, which ensures seamless and foolproof synchronisation within its infrastructure. Last is the transparent, traceable and auditable nature of transactions on the system. These enable a single record view to effect a faultless auditing process, enabling regulators to observe more easily and intervening only when needed.
The advantage of blockchain in Á sukūk issuance is that it can increase transparency of underlying assets and cash flows (Murugiah, 2018). Blockchain can enhance investors' decision-making given the wealth of information it makes available. The fact that blockchain provides real-time and a uniform view of transaction data, devoid of the need for many reconciliations, will go a long way in reducing costs and removing certain inefficiencies and frictions that plague the financial system .
Having explained the way Á sukūk on blockchain functions, the paper now moves on to investigate possible challenges facing this kind of Á sukūk.
Challenges facing blockchain Á sukūk The legal, regulatory and Sharīʾah requirements must be complied with in a Á sukūk issuance. This paper will explore the challenges facing blockchain Á sukūk under these three categories. One more category encompassing challenges peculiar to blockchain Á sukūk will also be discussed.

Legal challenges
In certain Á sukūk structures like bayʿ bi thaman ajīl, the Á sukūk is issued directly by the corporate receiving the funds, and the assets are bought and sold back to the corporate issuer within a short period of time. Here, there is no need of an intermediary as the Á sukūk evidences a debt obligation of the issuer (ISRA, 2015). However, where the Á sukūk holders own the underlying assets for the duration of the Á sukūk, like in an ij arah (lease) Á sukūk structure, an intermediary is required. This is typically done by selling the underlying assets to an SPV which holds the assets on trust for the Á sukūk holders (Securities Commission Malaysia, 2009b). After the sale, the SPV will then lease to the lessee (obligor) and issue the Á sukūk to the Á sukūk holders to raise funds (Securities Commission Malaysia, 2009b).
To ensure legal certainty for this transaction, the trust and other financial contractual obligations must be legally recognized by the respective jurisdiction within which the Á sukūk is issued or enforced (Bouheraoua et al., 2012).
Trust laws allow the splitting of ownership rights into two, namely, legal title ownership and beneficial ownership, as previous studies have noted (Nazar, 2011;Adawiah et al., 2015). What this means is that the one who has legal title ownership has legal interest in the property and can hold the property but for the benefit of the beneficial owner. The beneficial owner can enforce his rights on the property and is recognised as its true owner. The benefit of this arrangement is that it enables circumventing the need for certain tax payments and registration requirements. The jurisdiction within which the Á sukūk is to be enforced must recognize the dual nature of ownership and trust law. It is generally understood that jurisdictions that adopt the common law system recognize and enforce trust laws, however jurisdictions that follow the civil law legal system generally do not. The question occurs whether this legal issue will remain with blockchain Á sukūk. On the issues of transfer of assets and delineation of ownership (beneficial and legal title), it is believed that blockchain Á sukūk can avoid these legal concerns if the blockchain is recognised as an independent register of the legal title in the underlying assets. This solution would be especially pertinent to civil law jurisdictions, and even common law jurisdictions that are considered trust-law friendly would benefit from having just one register. Accordingly, in the case of transfer of assets, the blockchain platform can act as an instantaneous register of both the legal title and beneficial ownership as they are recorded in the blockchain. This was successfully demonstrated when Nivaura, a digital capital market solution provider, assisted LuxDeco, a corporate to issue two different blockchain bonds under the UK Financial Conduct Authority regulatory sandbox (Cohen et al., 2018).
In the LuxDeco/Nivaura blockchain bond, two different blockchain bonds were issued: a control bond as baseline and an experimental bond as pilot. The control bond, structured in the normal way, was a regular registered Pound sterling denominated bond. The control bond provided a prototype for tokenisation of fiat currency. Tokenisation is generally a way of replacing confidential data with distinctive recognition symbols that preserve the information about the data and ensure its security. In the case under consideration, tokenisation enabled the substitution and linking of fiat currency (pound sterling) to a token as nominal digital representation of the bond security. Through the tokenisation technique, information about the fiat currency was rendered tamper-proof and undecipherable as the tokenised fiat currency remains a security (Diego, 2014). Thus, a tokenised pound sterlingdenominated bond was issued to holders/subscribers, and it was cleared, settled and registered on Nivaura's blockchain platform. The pilot or experimental bond was the Á Sukūk on blockchain world's first digital currency (Ether)-denominated bond that was fully registered, cleared and settled on an open public blockchain (Sehra, 2017). It is interesting and noteworthy that in both the control bond and experimental bonds, blockchain served as the register that registered the legal title of the bond ownership (Cohen et al., 2018).
The approach used in the control and experimental bonds simplified the issuance of securities and reduced costs and processes in several ways. Firstly, the legal fees and process complexity were both reduced because the structure and documents were simpler and there was a reduction in the number of parties involved and quantity of documentation. This means saving complexity, time and cost (Cohen et al., 2018).
Nevertheless, where the law of the land requires registration of the legal title of the asset in a specialised register, this requirement will still have to be satisfied regardless of the blockchain platform being able to record the transfer of the asset. Also, other risks such as risk of breach of terms of contract, default risk and legal risks remain in blockchain Á sukūk.

Regulatory challenges
Without the regulatory authority's approval, capital market products generally cannot be issued. The regulatory authorities for the Á sukūk market are mainly the capital market regulator or the securities commission of respective countries. One of the main reasons why the regulatory authority supervises the capital market is to ensure that investors are protected and the activities of the market are organized in a manner which is acceptable and ethical. One of the characteristics of blockchain Á sukūk is that parts of the issuance process are decentralized thus raising regulatory issues. If there is no centralized regulatory authority to supervise all aspects of the issuance, then there is possibility of breaching some of the current consumer protection standards used in capital markets. This is an issue noted in earlier research works (Sole, 2008;Majid et al., 2011;Zakariaa et al., 2012;Tasnia et al., 2017). The point that needs to be understood is that blockchain Á sukūk can also fail and that the risk of default still exists. As such, continuous disclosure requirements imposed by regulatory authorities and the function of imposing punishments for non-compliance are essential for the successful implementation of blockchain Á sukūk projects.

Sharīʾah challenges
For the purpose of ensuring that Á sukūk are Sharīʾah-compliant products, there is need for a competent Sharīʾah advisor or Sharīʾah committee to endorse its structure in accordance with applicable Sharīʾah rules as required in any other Islamic financial product (Securities Commission Malaysia, 2018a;Bank Negara Malaysia, 2019). When a blockchain-based Á sukūk is structured, the same requirement needs to be followed, as Sharīʾah compliance of its structure is essential for the validity of the whole Á sukūk. Unlike Á sukūk, a conventional bond needs only one blockchain-based structure for all issuances regardless of differences in the objectives of the issuances. The relationship between the issuer and bond holders also remains that of debtor and creditor. Accordingly, the structure would remain uniform in all issuances. However, in Á sukūk structures, depending on the type of underlying Sharīʾah contract or contracts used to structure it, the steps involved will differ with each type of contract and the variations need to be brought to the structure (Bouheraoua et al., 2012). For this, the presence of a Sharīʾah advisor or Sharīʾah committee is required in each and every step of the Á sukūk issuance, including a blockchain-based Á sukūk (Securities Commission Malaysia, 2018b). As such, unlike in blockchain bonds, blockchain Á sukūk require endorsement of the structure by a Sharīʾah committee, and it would be challenging to have a uniform blockchain Á sukūk structure for all types of Á sukūk. This means that even in blockchain-based Á sukūk, the financial cost involved in obtaining services of the Sharīʾah adviser cannot be eliminated as the absence of a Sharīʾah adviser leads to Sharīʾah non-compliance risk.
Challenges and risks peculiar to blockchain Á sukūk If digital currencies are used for blockchain Á sukūk, then their legal and Sharīʾah acceptance will be an issue. Developments, however, are underway on the acceptance of digital currencies as legal tender; for example, by the Central Bank of China (People's Bank of China) (Bloomberg News, 2019). In Islamic finance, the Sharīʾah compliance of digital currencies is an issue that has not yet been settled unanimously among jurists. While most jurists do not sanction the legality or lawfulness of digital currencies, others have shared contrary viewpoints (Abubakar et al., 2018). The controversy surrounds the speculative and unstable nature of cryptocurrencies. However, in Malaysia the Malaysian Sharīʾah Advisory Council had in June and July 2020 decided that digital assets are Sharīʾah compliant if approved as securities by the SC. This definitely opens up possibilities for blockchain Á sukūk (Shariah Advisory Council Securities Commission Malaysia, 2020). Cyber risks are also definitely unique to blockchain Á sukūk. The risk of hacking and other cyber threats is relevant. Some jurisdictions have attempted to address this issue through regulations. For example, the Securities Commission Malaysia has issued distinct regulations on cyber risks, i.e. the Guidelines on Management of Cyber Risk in 2016 which applies to all capital market operators or entities. These Guidelines lay down the responsibilities and roles of relevant companies' management and board of directors in the management of cyber risks. Among other things, the guidelines require capital market operators to maintain cyber risk management procedures and policies in addition to allinclusive plans and measures for dealing with cyber risks. These include prevention, detection and recovery of cyber incidents as well as instant reporting of violations to the Securities Commission Malaysia.
Recommendations and future research direction Digital solutions to solve the above challenges are suggested in this section; these recommendations would require further research to explore their viability.
Legal issues such as risk of breach of terms of the contract and default risk can be mitigated through smart contracts within the blockchain platform that will be triggered when certain predefined events occur. Smart contracts that ensure compliance are a form of regtech, a class of technology that is used to ensure regulatory compliance. Another new term used in the market today is legaltech which can be defined as the use of technology to provide legal services (Asian Legaltech Association, 2020). For instance, standardised automated legal documentation could be used for blockchain Á sukūk issuances. Document automation is an area that needs to be explored for Á sukūk; the fees currently paid for legal documentation in the Á sukūk market can be significant, and this can be addressed with the introduction of legaltech.
With regard to reporting compliance and other reporting requirements, the regulatory authorities should upgrade this function by adopting regtech (Butler and O'Brien, 2019). Smart contracts coded on the blockchain platform can ensure that compliance is automated. Thus, most reporting requirements can be automatically complied with, with the use of regtech solutions coded into the Á sukūk blockchain (Butler and O'Brien, 2019). This solution will require the joint efforts of computer programmers, legal specialists and the regulators working in tandem to develop digital solutions.
As for Sharīʾah advisors, a solution that can be proposed is to develop an artificial intelligence (AI) technology with smart contracts to check the ongoing Sharīʾah compliance of the blockchain Á sukūk, possibly named "Shariahtech" (Abdullah, 2019). Its role would be to facilitate the function of Sharīʾah advisers in the monitoring of Á sukūk. While a Sharīʾah expert would be needed for initial structuring, continuous monitoring of the Sharīʾah compliance process could use technology. In other words, checking Sharīʾah compliance and mitigating Sharīʾah non-compliance risk in Islamic financial transactions could use technology to achieve Sharīʾah compliance. Since Sharīʾah advisory services are intermediary services used in Á sukūk transactions, instead of having human intervention throughout the duration of the investment, technologies such as AI could be used. If this is made possible, the cost of hiring the services of Sharīʾah advisers may be reduced without compromising Sharīʾah compliance . While the initial cost of developing the prototype Shariahtech may be high, in the long run the authors believe it will actually be reduced.

Conclusion
As an enabler, blockchain technology has made possible innovative changes to financial intermediation, including within the Islamic capital market and in Á sukūk. However, caution needs to be exercised while incorporating innovative technologies in Á sukūk, as in any other Islamic financial product, to guard against legal risk, regulatory risk, Sharīʾah risk and other risks. The foregoing discussions in this paper highlight how Á sukūk may benefit from blockchain technology. Even though blockchain has its advantages, there are, however, risks unique to blockchain Á sukūk that have to be overcome. In this regard, to develop Islamic finance and ensure its continued relevance, a purposive synergy needs to be created among all stakeholders, from Sharīʾah scholars and academia to regulators and the industry. Technology-enabled innovations do not make proper regulations redundant. The current processes in the Islamic capital market such as in Á sukūk issuance can be enhanced with the help of technology. However, technology cannot replace all the existing risk mitigation mechanisms in the Á sukūk issuance or any other product without properly enhancing the existing mechanisms using technology.
On this note, it is proposed that regtech, Shariahtech, legaltech and other suitable innovations be developed to complement blockchain Á sukūk. Accordingly, further research needs to be carried out in this regard. Notes 1. A peer-to-peer, or more commonly P2P, is a description of a decentralised communication model via computer application that enables linkup of commercial and/or private users of the internet to communicate or share resources with the same ability such that any participant can start off a communication session.
2. Described as public and open source, Ethereum is a blockchain-based distributed operating system and computing platform that features smart contracts (scripting) among other functionalities (Krishnamurthi and Shree, 2019). Ethereum has provided for an adapted version of Nakamoto consensus through transaction-based state transitions.
3. For example the underwriters were eliminated from a blockchain bond issuance named Bond-i by World Bank in collaboration with the Central Bank of Australia (World Bank, 2018).