Swaps on every chain

The wallet's swaps on every chain in scope, merged newest first, one keyset page at a time. Each item is one side of a swap seen from the wallet: buy = it received token, sell = it gave it.

Notes

• Pass the page's cursor back as cursor for the next page; cursor: null = nothing older. One transaction's rows stay on one page, so a page can hold fewer than limit items.
• A chain that could not be read for a page is listed in unavailable and keeps its place: the next page asks it again. items: [] with unavailable set is an outage, not an empty history.
• How far back: Monad, Robinhood Chain and Arc, their raw tape (45 days); Avalanche, Base, BNB Chain, Arbitrum One and Ethereum, their raw tape and then, where Chord's history lake holds older days, up to 5,000 older swaps; Solana, 45 days. EVM swaps under $0.10 are left out.
• ts is in milliseconds.
• Pages are not cached: without an API key (or an Ask session) each page counts against the budget it shares with GET /portfolio/{wallet} (10 new reads per IP every 10 minutes, a limited number a minute for every such caller together); past it 429 RATE_LIMITED or 503 BUSY with Retry-After.