Mirrored from filpgf.io — ProPGF Batch 3 (Karma program 1479, application 6a2d95f6e0e7d91b6125bab1, status: pending). Contact details redacted; canonical application lives on filpgf.io. 1.1 Project Name Blockscout block explorer 1.2 Project Github https://github.com/blockscout 1.3 Project Website https://www.blockscout.com/ 1.4 Team Lead/Point of Contact Mojmir Racak, Head of BD, Telegram @Mojmir_R 1.5 Category [ "Core Infrastructure" ] 1.6 Open Source Status Partial 2.1 Project Summary Blockscout requests funding to cover the upkeep, hosting, and maintenance of its Filecoin block explorer for a 12-month period beginning in December 2026. This grant keeps the Mainnet and Calibration Testnet instances online, indexed, and current with Filecoin protocol upgrades. The goal is to sustain infrastructure the ecosystem already depends on and provide updates as needed to support the chain. Previously, this work was covered by the foundation. Our ongoing hosting and maintenence contract with the foundation expires in November 2026. Core workstreams: - Hosting, indexing, and uptime for Filecoin Mainnet (314) and Calibration Testnet (314159), including archive node support - Maintenance to keep the explorer accurate through Filecoin network upgrades - Smart contract verification support (Solidity and Vyper) - REST and Etherscan-compatible API availability for storage providers and builders - Documentation upkeep 2.2 Who does this work support? [ "Application Builders", "Application Users", "Network Infrastructure", "Network Governance", "Other", "Storage Providers", "Pods", "Onramps" ] 2.3 Total Funding Requested (USD) $60,000 2.4 Milestones & Budget [ { "title": "Infrastructure Hosting & Explorer Uptime", "description": "Ongoing hosting, indexing, storage, and monitoring for the Mainnet and Calibration Testnet instances, including archive node support. Covers the operational cost (storage costs, devops procedures, troubleshooting and updates) of keeping both instances live and fully operational for the lenght of the grant period (12/1/26 - 12/1/27).", "dueDate": "2026-12-01", "fundingRequested": "48000", "completionCriteria": "Explorers and nodes will be maintained, updated and live with 99.5% uptime for the period of 1 year, beginning on Dec 1 2026 and running until Dec 1 2027." }, { "title": "Maintenance & Support", "description": "Engineering to keep the explorer accurate through Filecoin network upgrades: new actor versions, FVM precompile additions, and transaction-type changes. Scoped and delivered as upgrades are finalized. Stability and availability of REST and Etherscan-compatible endpoints, PRO API access for ecosystem builders, contract verification support, and documentation updates.", "dueDate": "2027-12-01", "fundingRequested": "12000", "completionCriteria": "Filecoin protocol upgrades will be scoped and supported in the explorer. If a major upgrade requires engineering efforts exceeding 50 hours we will discuss options with the filecoin team to explore options to defray additional costs." } ] 3.1 Impact pathway An up-to-date, full-featured explorer is a necessary component of any chain. It provides the receipts and transactional proof of all activity. Blockscout is a leader in the exploration space and trusted by many projects as their source of truth. This creates trust which is the foundation for new deals, profitibility and adoption. This grant keeps the Filecoin Mainnet and Calibration Testnet explorers hosted, indexed, and current with protocol upgrades, with stable contract verification services and reliable REST and Etherscan-compatible APIs. This is vital infrastructure for the chain, and results in developers, storage providers, clients, and agents with a transparent, accurate, reliable and machine-readable view of FEVM activity. Fee data and token flows stay transparent, and deployed contracts remain verifiable in production. 3.2 Verification metrics Blockscout is a primary data source used to measure onchain metrics for projects deployed on Filecoin. Projects can use our APIs to query all data, or download csvs with relevant data from the UI. One direct metric we can look at directly is contracts verified via Blockscout. This is measured via the verified contracts endpoint, and we would target a 2x increase in verified contracts on Blockscout over the course of the year. 3.3 References We work closely with the Filecoin team currently on updates, fixing any issues and custom development. Here are a few references: - Eva Shon "Blockscout’s Filecoin explorer offers an informed way of looking at Filecoin EVM contracts and their interactions that really helps builders see more of what’s going on. Their EVM bytecode database across many chains has also been a great help in easing contract verification which often has lots of gotchas.” - Jennifer Wang "blockscout has been our go to explorers as we enable more building in the user smart contract land!" 4.1 Monthly Operating Burn [ "$100-$1m (medium team or VC backed)" ] 4.2 What % of total team monthly burn depends on this grant? 3% 4.3 If this grant is not awarded, what happens? If we don't receive this grant will no longer be able to support the explorer/nodes for the Filecoin ecosystem. The explorer could be transferred to another party and we would help with the migration as needed. 4.4 Core Team Blockscout is maintained by a distributed team of ~19 engineers and contributors, building blockchain explorer infrastructure since 2018. Production deployments span 100+ EVM-compatible chains serving chains with billions of transactions and enterprise SLA requirements. - Eva Zhang: CEO, former CEO of Alibaba Pay. LinkedIn: https://www.linkedin.com/in/evayezhang - Ulyana Skladchikova: Product Lead. LinkedIn: https://www.linkedin.com/in/ulyanas/ - Mojmir Racak: Head of BD 4.5 Has your team received a ProPGF grant or funding from PLFIF before? [ "Yes" ] 5.1 Key risks & dependencies Most risks relate to changes beyond the maintenence scope such as Filecoin network upgrades or feature requests which require additional engineering beyond our maintenence costs. Infrastructure costs can also rise based on storage requirements and chain state growth. These all seem manageable within the context of the grant and our open communication channels with the team. Any feedback you have on the application process? The form is straightforward, looking forward to feedback and happy to clarify any additional information or provide more details. Thank you. Anything else you want to share that we didn't ask? We continue to make product updates and improvements to the explorer. Our team has worked closely with the Filecoin team for several years and are committed to making your ecosystem explorer the best it can be. We are familiar with the architecture and customizations we've done and hope to continue this work! Contributing to Core Infrastructure? We maintain the primary FEVM block explorer for mainnet and testnets at https://filecoin.blockscout.com/. It is a vital tool for developers and chain users to check transactions, verify contracts, and interact with onchain data via the API. We've worked with the foundation on the explorer over the past several years, including a custom project to enable Filecoin address support (f1, f2, f3, and f4) in the explorer. Karma Profile 0x921b009148d82d75e2ff7f582f088f84f991ebbdb3c445fb74e3c5cb14a78ab7 Objective 1 Indirect Objective 2 Indirect Objective 3 Indirect Open Source Context Blockscout is open code and available for singular projects to use as desired, however we recently updated from completely open-source to a license which restricts commercial reselling, as RaaS providers were taking advantage of the open codebase to resell the explorer to other users.