Add NodeFlare action provider

[nodeflareapp]

Description

Adds a NodeFlare action provider that gives an agent read access to on-chain data across 23 EVM chains through NodeFlare's public RPC gateway — Ethereum, Base, BNB Chain, Arbitrum, Optimism, Avalanche, HyperEVM, Polygon, and young chains like Robinhood Chain, Plasma, Ink, Zircuit, BOB and Soneium.

Unlike a wallet-bound provider, every action takes an explicit chain argument (slug, common name, or numeric chain ID), so an agent can query any supported chain without configuring a separate RPC per chain. All actions are read-only and keyless (free public tier), and the injected wallet provider is not used — supportsNetwork returns true.

Structure and conventions follow the existing alchemy action provider (schemas in schemas.ts, string-returning actions, Jest tests, README).

Actions

• get_supported_chains — list the chains, with chain IDs and native currencies
• get_block_number — latest block on a chain
• get_native_balance — native gas-token balance of an address
• get_erc20_balance — ERC-20 balance for a holder (human-readable)
• get_token_metadata — ERC-20 name, symbol, decimals, total supply
• get_gas_price — current gas price in gwei
• get_transaction — look up a transaction by hash

Multi-read actions batch their eth_calls into a single JSON-RPC request to stay within the public rate limit.

Tests

Added nodeflareActionProvider.test.ts (Jest, mocked fetch) covering supportsNetwork, chain resolution (name + numeric ID), a successful native-balance/gas read, and gateway-error handling.

Checklist

• New action provider under src/action-providers/nodeflare/
• Registered in src/action-providers/index.ts
• Unit tests
• README
• Changeset

[cb-heimdall]

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