addrbookFor publishers
← The evidence ledger

Evidence row 120144

Observed , by baseline/1.

Kind
listing
About
source_record x402_bazaar:https://saylorinnovations.com/api/kb/how-flash-loans-smart-contracts-can-be-profitable
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
14c63be2fa0331e569971187177ee6746e61c47f597fece3f37039144e611eff
Leaf
0x40f76469c3575fc2d51904de10a383908fb79681091e2b9f3aff89c0cd488d15

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/kb/how-flash-loans-smart-contracts-can-be-profitable"
    ]
  ],
  "name": "Saylor Innovations Guide Library",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:how-flash-loans-smart-con",
          "name": "USD Coin",
          "note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:how-flash-loans-smart-con",
          "name": "USD Coin",
          "note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:137",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:how-flash-loans-smart-con",
          "name": "USD Coin",
          "note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:42161",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
          "memo": "saylor:how-flash-loans-smart-con",
          "reference": "GehduUmQHkWNSCZ1n2GwwgJpJCcJmqh21crD9W6dTART",
          "session": "eyJhcnRpY2xlSWQiOiJob3ctZmxhc2gtbG9hbnMtc21hcnQtY29udHJhY3RzLWNhbi1iZS1wcm9maXRhYmxlIiwicmVmZXJlbmNlIjoiR2VoZHVVbVFIa1dOU0NaMW4yR3d3Z0pwSkNjSm1xaDIxY3JEOVc2ZFRBUlQiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjQ2NDc1NjY5OX0.CZ3CyokgzCDweXptTEwxNPyxxcLEFrMaYqs7PwNTvfk"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
        "extra": {
          "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
          "memo": "saylor:how-flash-loans-smart-con",
          "reference": "Ce11bTaozXaGRRr2zrLaguTr79XoNz93R8yBQ6rw2ox6",
          "session": "eyJhcnRpY2xlSWQiOiJob3ctZmxhc2gtbG9hbnMtc21hcnQtY29udHJhY3RzLWNhbi1iZS1wcm9maXRhYmxlIiwicmVmZXJlbmNlIjoiQ2UxMWJUYW96WGFHUlJyMnpyTGFndVRyNzlYb056OTNSOHlCUTZydzJveDYiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjQ2NDc1NjY5OX0.7hRDPKO1YzU7a_gXfpV8HxwpugI7c67jhNhPB1goXcI"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "92327",
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "memo": "saylor:how-flash-loans-smart-con",
          "native": true,
          "note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
          "quotedLamports": "95183",
          "reference": "CzAYNG68wP9amas35D1dW9gAdeATrjaB5GRM5wkXZp89",
          "session": "eyJhcnRpY2xlSWQiOiJob3ctZmxhc2gtbG9hbnMtc21hcnQtY29udHJhY3RzLWNhbi1iZS1wcm9maXRhYmxlIiwicmVmZXJlbmNlIjoiQ3pBWU5HNjh3UDlhbWFzMzVEMWRXOWdBZGVBVHJqYUI1R1JNNXdrWFpwODkiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTIzMjcsImV4cCI6MTc5MjQ2NDc1NjY5OX0.ezg693kTwlZsU4nj-9n-z--wgB4vmO1paz7YeXQEgI0",
          "solUsdPrice": 105.06
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "How Flash Loans & Smart Contracts Can Be Profitable. Legitimate profit mechanisms in DeFi: how flash loans provide uncollateralized capital that must be borrowed and repaid within one block (reverting otherwise), with uses in DEX arbitrage, collateral swaps, and liquidations; plus lending, liquidity provision, and yield farming — framed with a risk disclaimer.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "type": "http"
          },
          "output": {
            "example": {
              "body": "Legitimate profit mechanisms in DeFi: how flash loans provide uncollateralized capital that must be borrowed and repaid within one block (reverting otherwise), with uses in DEX arbitrage, collateral swaps, and liquidations; plus lending, liquidity provision, and yield farming — framed with a risk disclaimer.",
              "c": "On-chain & DeFi",
              "id": "how-flash-loans-smart-contracts-can-be-profitable",
              "t": "How Flash Loans & Smart Contracts Can Be Profitable"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "body": {
                      "description": "Main body text",
                      "type": "string"
                    },
                    "c": {
                      "description": "Category of the guide",
                      "type": "string"
                    },
                    "id": {
                      "description": "Identifier of the record",
                      "type": "string"
                    },
                    "license": {
                      "description": "License identifier",
                      "type": "string"
                    },
                    "price": {
                      "description": "Price",
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "t": {
                      "description": "Title of the guide",
                      "type": "string"
                    }
                  },
                  "required": [
                    "id",
                    "t",
                    "c",
                    "body"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "json",
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1790235422/bazaar-icons/bc5e2b3d111ebbef.jpg",
    "lastUpdated": "2026-10-20T02:50:36.732Z",
    "quality": {
      "l30DaysTotalCalls": 4,
      "l30DaysUniquePayers": 3,
      "lastCalledAt": "2026-10-20T02:50:36.446Z"
    },
    "resource": "https://saylorinnovations.com/api/kb/how-flash-loans-smart-contracts-can-be-profitable",
    "serviceName": "Saylor Innovations Guide Library",
    "tags": [
      "flash-loans",
      "defi",
      "arbitrage",
      "smart-contracts",
      "yield-farming"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "How Flash Loans & Smart Contracts Can Be Profitable. Legitimate profit mechanisms in DeFi: how flash loans provide uncollateralized capital that must be borrowed and repaid within one block (reverting otherwise), with uses in DEX arbitrage, collateral swaps, and liquidations; plus lending, liquidity provision, and yield farming — framed with a risk disclaimer."
}

What the leaf hashes

{"body":"14c63be2fa0331e569971187177ee6746e61c47f597fece3f37039144e611eff","id":120144,"kind":"listing","method":"baseline/1","observed_us":1793025617417642,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/kb/how-flash-loans-smart-contracts-can-be-profitable","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).

  1. 0x40f78b9c24cd98e08dcb91ee56a3343a21f34b34621a307b06f91d077540b69a
  2. 0x1e5babcd122c6050844990ee1227250aae1c5e0912c6197b685dd9fb38751e26
  3. 0x3b29892c1437797f4533f44ae10b72082478d3d99576a6641fd8cd638753d5b7
  4. 0x37157410613a626f965008c5c3094fb8bb47847b939c303606340bf5864a18c6
  5. 0x5cdb00343db31aa84aff767b5a9896cc7429babaf94d1c5d6d35a7f7f2065246
  6. 0xe1acde8424e8eaa13ddb1bf0ab8a6956857c86b743055df3f8fc3648ff55244c
  7. 0x3c7a87573c9873ad328bfb0c80ba9aa280c5da80e8f98a2e6201578ed3e9eba8
  8. 0x03b0d6647e1b95ae4212d7bb67bdf30f1f090d20b25fcc71a5f7ddc04737eabb
  9. 0x297e778dc632079ae966811cbed1ce7e880ec88e6c6fbd70ae0259c8556afdc3
  10. 0x61ddb91fde9e2c921e12d8fcfd92154f500278c092641e51eabcf667263cd2b9
  11. 0x475d2fbee38b77be440946f3f083a3953187376db2f7f57a3a3db41905aa12b6
  12. 0xe2bb2a30c74e0bf16b8b75c332bdd45334d0338bef3f3022b7ea7b55718e1369
  13. 0xd406739acce2ba016f8d49081b15f266a4ea4a0b0fc5ef171c89c8fd2dda4d80
  14. 0x8b27a4c21bf4ba962fd008c8f4300bc6953764a5032b9ab0cfe696b318c45326
  15. 0x4b52a97f7a80ff7778a702b85267b8d2e5c93ce160942656435c29ae7be68bf4
  16. 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
  17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
  18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
  19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
Day root
0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained
0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published
On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON