ERC-20 balance read on Base: takes token (ERC-20 contract, 0x + 40 hex) and address (holder, 0x + 40 hex) and returns that holder's balanceOf as read from the token contract.

GET https://ari001.tailb4ac3a.ts.net/v1/ventures/x402_chain_reads_v1/base_erc20_balanceof. Same payment terms as that HTTP route. Call once with no payment. The result is the payment terms. Retry the same call with the signed payment at _meta["x402/payment"]. Measured output: {"chain": "base", "method": "balanceOf", "ok": true, "result": "70000", "service": "x402_chain_reads_v1.base_erc20_balanceof"}