A page's request that the node refuses now reaches it with the node's
own JSON-RPC code and data: a proxied read such as a reverting eth_call,
a transaction whose gas estimate reverts, and a failed broadcast. Every
other refusal carries a code too: 4100 when there is no address, -32602
when the site asks for two different gas limits or a transaction type
this wallet does not sign, and -32603 for a failure inside the wallet.
nodeError() in approvalVerify.js reads the node's error out of what
ethers throws, as failureTexts() already did inline.
Model: opus-5-5
sneak