Wallet Activity Heatmap

Plots transaction timestamps across a grid of days against hours, shading each cell relative to the busiest one so the pattern reads the same whether a wallet made ten transactions or ten thousand. Block timestamps are cached per block, since several transactions usually share one and a block fetch costs far more than a transaction fetch. The finding it looks for is a long unbroken quiet run: a consistent gap of five hours or more usually means somebody sleeps, while activity in every hour across hundreds of transactions is more typical of a bot or a shared address. It also says plainly that reading this as a timezone clue only works for one person acting manually.