{"id":402,"date":"2025-12-02T19:36:55","date_gmt":"2025-12-02T19:36:55","guid":{"rendered":"https:\/\/web3fuel.io\/article\/?p=402"},"modified":"2026-02-09T18:27:03","modified_gmt":"2026-02-09T18:27:03","slug":"axelar-analysis","status":"publish","type":"post","link":"https:\/\/web3fuel.io\/article\/axelar-analysis\/","title":{"rendered":"Inside Axelar: How 75 Validators Enable Cross-Chain Smart Contract Calls"},"content":{"rendered":"

Inside Axelar: How 75 Validators Enable Cross-Chain Smart Contract Calls<\/strong><\/h1>\n

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Axelar's cross-chain infrastructure enables developers to build applications that wouldn't be possible with simpler token bridges. Here's what I learned by actually using it.<\/em><\/p>\n

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by Alex G.<\/a><\/span> | Dec 2, 2025<\/span><\/p><\/div><\/div><\/div><\/div>

Most people think cross-chain bridges just move tokens from one blockchain to another. Lock tokens on one blockchain, mint wrapped versions on another blockchain, and that's it - simple token transfer between chains. That's how I understood bridges too; until I started digging into Axelar's architecture and realized it's not a bridge at all.<\/p>\n

Axelar isn't moving tokens from Chain A to Chain B - it's letting developers call any smart contract function from any blockchain. You can trigger a function on Ethereum from Arbitrum, execute a governance vote on Polygon that affects Avalanche, or even build applications that span multiple chains in ways that shouldn't be possible.<\/p>\n

The magic in how this works is through 75 validators running a Byzantine Fault Tolerant consensus<\/em>. A majority \u2154 of the validators have to agree before anything happens cross-chain and they use threshold signatures where each validator holds part of a key.<\/p>\n

I wanted to see this in action, so I bridged some tokens and tracked what actually happened using Axelar's block explorer. The transaction touched multiple blockchains, showed me exactly which block the validators reached consensus, and revealed way more detail than I'd seen with other bridges.<\/p>\n

What I found was more complex and more interesting than I expected. Here's how it actually works.<\/p>\n<\/div><\/div>

\/\/ <\/span>TL;DR - Key Takeaways<\/b><\/h2>\n<\/div><\/div>
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  • 75 validators<\/strong> use delegated Proof-of-Stake and Byzantine consensus to verify cross-chain messages - requiring \u2154 agreement before any transaction executes.<\/li>\n
  • Three connection architectures<\/strong>: Cosmos chains via native IBC, EVM chains via Gateway smart contracts, and specialized Gateway Programs (eg. Solana).<\/li>\n
  • General Message Passing (GMP)<\/strong> allows developers to call any smart contract function from any connected chain - not just transfer tokens.<\/li>\n
  • Security through economics<\/strong>: Validators stake AXL tokens and can be slashed for misbehavior, unlike reputation-based systems with no capital at risk.<\/li>\n
  • Transparency trade-off<\/strong>: Slower than centralized bridges, but Axelarscan shows transaction tracking that most bridges don't provide.<\/li>\n<\/ul>\n

    My transaction cost $0.65 total and involved a \"ContractCallWithToken\" - Axelar's GMP method that executes smart contract functions on destination chains, not just simple token transfers.<\/p>\n<\/div><\/div><\/div><\/div>

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