Axelar Amplifier: permissionless onboarding

"Good evening. Tonight we cover axelar amplifier and verifier sets. This is the kind of topic that sits right on the seam between research and production, and we're going to walk through the construction before looking at what it means for the chains that actually ship it."

"The short version is this: Axelar is a Cosmos SDK chain whose entire job is cross-chain routing. We'll spend the first half of the segment on the core mechanism, and the second half on what operators are actually deploying."

"Let's start with the basics. The validator set signs off on messages crossing the hub, which lets Axelar act as a general message passing layer with a single unified security assumption. Amplifier is the newer architecture that opens the model up: external chains can be added permissionlessly, with their own verifier sets running as CosmWasm contracts on the Axelar chain. Keep that in mind as we go deeper."