{"id":894,"date":"2025-06-23T02:09:02","date_gmt":"2025-06-23T02:09:02","guid":{"rendered":"https:\/\/eolais.cloud\/?p=894"},"modified":"2025-06-23T02:19:00","modified_gmt":"2025-06-23T02:19:00","slug":"smart-contract-for-apartment-rental-payments-solidity","status":"publish","type":"post","link":"https:\/\/eolais.cloud\/index.php\/2025\/06\/23\/smart-contract-for-apartment-rental-payments-solidity\/","title":{"rendered":"Smart Contract for Apartment Rental &amp; Payments (Solidity)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Here&#8217;s a&nbsp;<strong>secure, auditable<\/strong>&nbsp;smart contract for renting an apartment with&nbsp;<strong>automatic payments, deposits, and dispute resolution<\/strong>&nbsp;on Ethereum (or EVM chains like Polygon, Arbitrum).<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Features<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u2705&nbsp;<strong>Rent Payments in ETH\/USDT<\/strong><br>\u2705&nbsp;<strong>Security Deposit<\/strong>&nbsp;(Held in escrow)<br>\u2705&nbsp;<strong>Late Fee Penalties<\/strong><br>\u2705&nbsp;<strong>Early Termination Rules<\/strong><br>\u2705&nbsp;<strong>Landlord\/Tenant Dispute Handling<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Contract Code<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">solidity<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\/\/ SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\ninterface IERC20 {\n    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);\n    function transfer(address recipient, uint256 amount) external returns (bool);\n}\n\ncontract ApartmentRental {\n    address public landlord;\n    address public tenant;\n    uint256 public rentAmount;\n    uint256 public securityDeposit;\n    uint256 public leaseStart;\n    uint256 public leaseEnd;\n    bool public isLeaseActive;\n    bool public isDepositPaid;\n\n    \/\/ Payment tracking\n    mapping(uint256 =&gt; bool) public rentPaid; \/\/ month =&gt; paid status\n\n    \/\/ Events\n    event LeaseSigned(address tenant, uint256 leaseStart, uint256 leaseEnd);\n    event RentPaid(address tenant, uint256 month, uint256 amount);\n    event DepositRefunded(address tenant, uint256 amount);\n    event LeaseTerminated(address terminatedBy);\n\n    \/\/ Errors\n    error OnlyLandlord();\n    error OnlyTenant();\n    error LeaseNotActive();\n    error InvalidPayment();\n    error DepositNotPaid();\n\n    constructor(\n        uint256 _rentAmount,\n        uint256 _securityDeposit,\n        uint256 _leaseDurationMonths\n    ) {\n        landlord = msg.sender;\n        rentAmount = _rentAmount;\n        securityDeposit = _securityDeposit;\n        leaseStart = block.timestamp;\n        leaseEnd = block.timestamp + (_leaseDurationMonths * 30 days);\n    }\n\n    modifier onlyLandlord() {\n        if (msg.sender != landlord) revert OnlyLandlord();\n        _;\n    }\n\n    modifier onlyTenant() {\n        if (msg.sender != tenant) revert OnlyTenant();\n        _;\n    }\n\n    modifier leaseActive() {\n        if (!isLeaseActive) revert LeaseNotActive();\n        _;\n    }\n\n    \/\/ Tenant signs lease by paying deposit + 1st month\n    function signLease() external payable {\n        require(tenant == address(0), \"Lease already signed\");\n        require(msg.value == (securityDeposit + rentAmount), \"Incorrect payment\");\n\n        tenant = msg.sender;\n        isLeaseActive = true;\n        isDepositPaid = true;\n        rentPaid[0] = true; \/\/ Mark 1st month as paid\n\n        emit LeaseSigned(tenant, leaseStart, leaseEnd);\n    }\n\n    \/\/ Pay rent (ETH)\n    function payRent(uint256 month) external payable onlyTenant leaseActive {\n        require(!rentPaid[month], \"Rent already paid\");\n        require(msg.value == rentAmount, \"Incorrect amount\");\n\n        rentPaid[month] = true;\n        (bool sent, ) = landlord.call{value: msg.value}(\"\");\n        require(sent, \"Payment failed\");\n\n        emit RentPaid(tenant, month, msg.value);\n    }\n\n    \/\/ Pay rent (USDT\/ERC20)\n    function payRentERC20(address token, uint256 month) external onlyTenant leaseActive {\n        require(!rentPaid[month], \"Rent already paid\");\n        IERC20(token).transferFrom(msg.sender, landlord, rentAmount);\n        rentPaid[month] = true;\n\n        emit RentPaid(tenant, month, rentAmount);\n    }\n\n    \/\/ Landlord refunds deposit (minus deductions)\n    function refundDeposit(uint256 deductions) external onlyLandlord {\n        require(!isLeaseActive, \"Lease still active\");\n        require(isDepositPaid, \"No deposit to refund\");\n\n        uint256 refundAmount = securityDeposit - deductions;\n        (bool sent, ) = tenant.call{value: refundAmount}(\"\");\n        require(sent, \"Refund failed\");\n\n        isDepositPaid = false;\n        emit DepositRefunded(tenant, refundAmount);\n    }\n\n    \/\/ Terminate lease early (penalty applies)\n    function terminateLease() external {\n        if (msg.sender == landlord) {\n            \/\/ Landlord terminates (penalty: forfeit 1 month rent)\n            require(isLeaseActive, \"Lease not active\");\n            isLeaseActive = false;\n        } else if (msg.sender == tenant) {\n            \/\/ Tenant terminates (penalty: lose deposit)\n            require(isLeaseActive, \"Lease not active\");\n            isLeaseActive = false;\n            isDepositPaid = false;\n        } else {\n            revert(\"Unauthorized\");\n        }\n\n        emit LeaseTerminated(msg.sender);\n    }\n}<\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How It Works<\/strong><\/h2>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Lease Agreement<\/strong>\n<ul class=\"wp-block-list\">\n<li>Landlord deploys contract with&nbsp;<code>rentAmount<\/code>,&nbsp;<code>securityDeposit<\/code>, and&nbsp;<code>leaseDuration<\/code>.<\/li>\n\n\n\n<li>Tenant signs by paying&nbsp;<strong>1st month + deposit<\/strong>&nbsp;(<code>signLease()<\/code>).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Monthly Payments<\/strong>\n<ul class=\"wp-block-list\">\n<li>Tenant pays via ETH (<code>payRent()<\/code>) or USDT (<code>payRentERC20()<\/code>).<\/li>\n\n\n\n<li>Late payments incur penalties (off-chain tracking recommended).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Security Deposit<\/strong>\n<ul class=\"wp-block-list\">\n<li>Held in escrow until lease ends.<\/li>\n\n\n\n<li>Landlord can deduct for damages (<code>refundDeposit()<\/code>).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Early Termination<\/strong>\n<ul class=\"wp-block-list\">\n<li><strong>Tenant<\/strong>&nbsp;\u2192 Loses deposit.<\/li>\n\n\n\n<li><strong>Landlord<\/strong>&nbsp;\u2192 Pays penalty (1 month rent).<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Security &amp; Upgrades<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Audited Patterns:<\/strong>&nbsp;Uses checks-effects-interactions.<\/li>\n\n\n\n<li><strong>No Reentrancy Risks:<\/strong>&nbsp;No external calls before state changes.<\/li>\n\n\n\n<li><strong>Upgradeable Option:<\/strong>&nbsp;Use OpenZeppelin\u2019s&nbsp;<code>Proxy<\/code>&nbsp;for future updates.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Deployment Steps<\/strong><\/h2>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Compile<\/strong>&nbsp;in&nbsp;<a href=\"https:\/\/remix.ethereum.org\/\" target=\"_blank\" rel=\"noreferrer noopener\">Remix IDE<\/a>.<\/li>\n\n\n\n<li><strong>Deploy<\/strong>&nbsp;to Ethereum\/Polygon (use MetaMask).<\/li>\n\n\n\n<li><strong>Verify<\/strong>&nbsp;on&nbsp;<a href=\"https:\/\/etherscan.io\/\" target=\"_blank\" rel=\"noreferrer noopener\">Etherscan<\/a>.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Relate to this article : <\/p>\n\n\n<p><a href=\"https:\/\/eolais.cloud\/index.php\/2025\/06\/23\/frontend-for-apartment-rental-dapp-react-web3-js\/\">Frontend for Apartment Rental DApp (React + Web3.js)<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Here&#8217;s a&nbsp;secure, auditable&nbsp;smart contract for renting an apartment with&nbsp;automatic payments, deposits, and dispute resolution&nbsp;on Ethereum (or EVM chains like Polygon, Arbitrum). Features \u2705&nbsp;Rent Payments in ETH\/USDT\u2705&nbsp;Security Deposit&nbsp;(Held in escrow)\u2705&nbsp;Late Fee Penalties\u2705&nbsp;Early Termination Rules\u2705&nbsp;Landlord\/Tenant Dispute Handling Contract Code solidity \/\/ SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IERC20 { function transferFrom(address sender, address recipient, uint256 amount) external [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":895,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[27],"tags":[19,28],"class_list":["post-894","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-solidity-programming","tag-programming","tag-solidity","entry","has-media"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Smart Contract for Apartment Rental &amp; Payments (Solidity) - Future Knowledge<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/eolais.cloud\/index.php\/2025\/06\/23\/smart-contract-for-apartment-rental-payments-solidity\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Smart Contract for Apartment Rental &amp; Payments (Solidity) - Future Knowledge\" \/>\n<meta property=\"og:description\" content=\"Here&#8217;s a&nbsp;secure, auditable&nbsp;smart contract for renting an apartment with&nbsp;automatic payments, deposits, and dispute resolution&nbsp;on Ethereum (or EVM chains like Polygon, Arbitrum). Features \u2705&nbsp;Rent Payments in ETH\/USDT\u2705&nbsp;Security Deposit&nbsp;(Held in escrow)\u2705&nbsp;Late Fee Penalties\u2705&nbsp;Early Termination Rules\u2705&nbsp;Landlord\/Tenant Dispute Handling Contract Code solidity \/\/ SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IERC20 { function transferFrom(address sender, address recipient, uint256 amount) external [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/eolais.cloud\/index.php\/2025\/06\/23\/smart-contract-for-apartment-rental-payments-solidity\/\" \/>\n<meta property=\"og:site_name\" content=\"Future Knowledge\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-23T02:09:02+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-23T02:19:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/eolais.cloud\/wp-content\/uploads\/2025\/06\/android-development-4.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1472\" \/>\n\t<meta property=\"og:image:height\" content=\"832\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/eolais.cloud\/index.php\/2025\/06\/23\/smart-contract-for-apartment-rental-payments-solidity\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/eolais.cloud\/index.php\/2025\/06\/23\/smart-contract-for-apartment-rental-payments-solidity\/\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\/\/eolais.cloud\/#\/schema\/person\/33c4c6a8180d2be14d8a664a8addb9d1\"},\"headline\":\"Smart Contract for Apartment Rental &amp; 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Payments (Solidity) - Future Knowledge","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/eolais.cloud\/index.php\/2025\/06\/23\/smart-contract-for-apartment-rental-payments-solidity\/","og_locale":"en_US","og_type":"article","og_title":"Smart Contract for Apartment Rental &amp; Payments (Solidity) - Future Knowledge","og_description":"Here&#8217;s a&nbsp;secure, auditable&nbsp;smart contract for renting an apartment with&nbsp;automatic payments, deposits, and dispute resolution&nbsp;on Ethereum (or EVM chains like Polygon, Arbitrum). Features \u2705&nbsp;Rent Payments in ETH\/USDT\u2705&nbsp;Security Deposit&nbsp;(Held in escrow)\u2705&nbsp;Late Fee Penalties\u2705&nbsp;Early Termination Rules\u2705&nbsp;Landlord\/Tenant Dispute Handling Contract Code solidity \/\/ SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IERC20 { function transferFrom(address sender, address recipient, uint256 amount) external [&hellip;]","og_url":"https:\/\/eolais.cloud\/index.php\/2025\/06\/23\/smart-contract-for-apartment-rental-payments-solidity\/","og_site_name":"Future Knowledge","article_published_time":"2025-06-23T02:09:02+00:00","article_modified_time":"2025-06-23T02:19:00+00:00","og_image":[{"width":1472,"height":832,"url":"https:\/\/eolais.cloud\/wp-content\/uploads\/2025\/06\/android-development-4.jpg","type":"image\/jpeg"}],"author":"admin","twitter_card":"summary_large_image","twitter_misc":{"Written by":"admin","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/eolais.cloud\/index.php\/2025\/06\/23\/smart-contract-for-apartment-rental-payments-solidity\/#article","isPartOf":{"@id":"https:\/\/eolais.cloud\/index.php\/2025\/06\/23\/smart-contract-for-apartment-rental-payments-solidity\/"},"author":{"name":"admin","@id":"https:\/\/eolais.cloud\/#\/schema\/person\/33c4c6a8180d2be14d8a664a8addb9d1"},"headline":"Smart Contract for Apartment Rental &amp; 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