$ pnpm dlx bun repl
> import {fetchSysvarStakeHistory} from './packages/sysvars';
undefined
> import {createSolanaRpc} from './packages/kit'
undefined
> const r = createSolanaRpc('https://api.mainnet-beta.solana.com')
undefined
> await fetchSysvarStakeHistory(r);
[
  {
    epoch: 769n,
    stakeHistory: {
      effective: 383590604902523127n,
      activating: 4044071834618951n,
      deactivating: 4656615498818574n
    }
  },
  /* ... */
]

$ curl https://api.mainnet-beta.solana.com -s -X   POST -H "Content-Type: application/json" -d '
  {
    "jsonrpc": "2.0",
    "id": 1,
    "method": "getAccountInfo",
    "params": [
      "SysvarStakeHistory1111111111111111111111111",
      {
        "encoding": "jsonParsed"
      }
    ]
  }
' | jq
{
  "jsonrpc": "2.0",
  "result": {
    "context": {
      "apiVersion": "2.1.16",
      "slot": 332640417
    },
    "value": {
      "data": {
        "parsed": {
          "info": [
            {
              "epoch": 769,
              "stakeHistory": {
                "activating": 4044071834618951,
                "deactivating": 4656615498818574,
                "effective": 383590604902523127
              }
              /* ... */