← The evidence ledger
Evidence row 119901
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://saylorinnovations.com/api/finance/npv-irr
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- e34fc6811327ce23163400a8afa6bcfc1fc59171896af3a44c07971dd202ef1c
- Leaf
- 0xaefda30226c41654fca3809258fadaa6ae81781f5360ad77abef03d7a421636e
What was observed
{
"endpoints": [
[
"x402",
"https://saylorinnovations.com/api/finance/npv-irr"
]
],
"name": "Saylor Innovations Data Desk",
"owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:npv-irr",
"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:datadesk:npv-irr",
"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:datadesk:npv-irr",
"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:datadesk:npv-irr",
"reference": "6mRxJ25kN62YoRSkYp1y2seEk4mxxsgRsJVrxEf6vh6r",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpucHYtaXJyIiwicmVmZXJlbmNlIjoiNm1SeEoyNWtONjJZb1JTa1lwMXkyc2VFazRteHhzZ1JzSlZyeEVmNnZoNnIiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjM4MTY2NjYwNX0.BQyvuJ-HMEovbpMik6nxGFeGzMW7iC-k6SdYK7wx6eg"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb",
"memo": "saylor:datadesk:npv-irr",
"reference": "HiLCCEvAzNaXb4xVFQvtG7Mwr4mcaMXtQqEqDRjTvCm2",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpucHYtaXJyIiwicmVmZXJlbmNlIjoiSGlMQ0NFdkF6TmFYYjR4VkZRdnRHN013cjRtY2FNWHRRcUVxRFJqVHZDbTIiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjM4MTY2NjYyNH0.fabNg7RflsFz5ZGkB2Bpg59n8DPZ8j2JSBFCPNzb95w"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "92231",
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:npv-irr",
"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": "95084",
"reference": "EBhBhNzH7QsdXUYLNfVosLtz6wr34jhvdXr6TevXNL49",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpucHYtaXJyIiwicmVmZXJlbmNlIjoiRUJoQmhOekg3UXNkWFVZTE5mVm9zTHR6NndyMzRqaHZkWHI2VGV2WE5MNDkiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTIyMzEsImV4cCI6MTc5MjM4MTY2NjYyNX0.5PY93fhOnrUt80zFRUpdJgFIwa1QWwDsRWXgAQkRors",
"solUsdPrice": 105.17
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
}
],
"description": "NPV, IRR, profitability index, payback and discounted payback for a cash-flow series with an accept or reject decision and NPV at several discount rates",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"cashflows": "-1000,300,400,500,200",
"rate": "0.08"
},
"type": "http"
},
"output": {
"example": {
"cashflows": [
-1000,
300,
400,
500,
200
],
"decision": "accept: positive NPV at the discount rate",
"discount_rate": 0.08,
"discounted_payback_periods": 2.96,
"irr": 0.153221,
"irr_percent": 15.322,
"note": "Cash flows are assumed to arrive at equal period intervals starting with period 0 (the outlay). IRR is the discount rate that makes NPV zero; with sign changes in the middle of the series more than one IRR can exist and this returns the first bracketed root.",
"npv": 164.6354,
"npv_at_rates": [
{
"npv": 400,
"rate": 0
},
{
"npv": 244.99,
"rate": 0.05
},
{
"npv": 115.57,
"rate": 0.1
},
{
"npv": 6.44,
"rate": 0.15
},
{
"npv": -86.42,
"rate": 0.2
}
],
"payback_periods": 2.6,
"periods": 4,
"profitability_index": 1.1646,
"source": "discounted cash flow",
"total_undiscounted_return": 400
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"cashflows": {
"description": "Comma-separated cash flows, initial outlay first (negative)",
"type": "string"
},
"rate": {
"description": "optional discount rate decimal, default 0.10",
"type": "string"
}
},
"required": [
"cashflows"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"cashflows": {
"description": "The cash flows that were evaluated",
"type": [
"array",
"null"
]
},
"decision": {
"description": "Accept or reject verdict from NPV",
"type": "string"
},
"discount_rate": {
"description": "Discount rate",
"type": "number"
},
"discounted_payback_periods": {
"description": "Discounted payback periods",
"type": [
"number",
"null"
]
},
"irr": {
"description": "Internal rate of return per period",
"type": [
"number",
"null"
]
},
"irr_percent": {
"description": "Irr, as a percentage",
"type": [
"number",
"null"
]
},
"note": {
"description": "Caveat or context for reading the result",
"type": "string"
},
"npv": {
"description": "Net present value at the discount rate",
"type": "number"
},
"npv_at_rates": {
"description": "Npv at rates",
"items": {
"properties": {
"npv": {
"description": "Net present value at that rate",
"type": [
"number",
"null"
]
},
"rate": {
"description": "Rate"
}
},
"type": "object"
},
"type": "array"
},
"payback_periods": {
"description": "Payback periods",
"type": [
"number",
"null"
]
},
"periods": {
"description": "Number of periods in the cash flow series",
"type": "number"
},
"profitability_index": {
"description": "Profitability index",
"type": [
"number",
"null"
]
},
"source": {
"description": "Data source the values come from",
"type": "string"
},
"total_undiscounted_return": {
"description": "Total undiscounted return",
"type": [
"number",
"null"
]
}
},
"required": [
"periods",
"npv",
"decision"
],
"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/v1791811517/bazaar-icons/bc5e2b3d111ebbef.jpg",
"lastUpdated": "2026-10-19T03:45:46.847Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-19T03:45:46.283Z"
},
"resource": "https://saylorinnovations.com/api/finance/npv-irr",
"serviceName": "Saylor Innovations Data Desk",
"tags": [
"npv and irr calculator",
"net present value of cash flows",
"internal rate of return",
"payback period calculation",
"should i accept this investment"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "NPV, IRR, profitability index, payback and discounted payback for a cash-flow series with an accept or reject decision and NPV at several discount rates"
}What the leaf hashes
{"body":"e34fc6811327ce23163400a8afa6bcfc1fc59171896af3a44c07971dd202ef1c","id":119901,"kind":"listing","method":"baseline/1","observed_us":1793025616914529,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/finance/npv-irr","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).
- 0xaefd996b59a88ba1834996b07258038a235fa7da89d5e6489c7d27a229daf145
- 0xdae7a0217e3a75473b7651d28193f5c61e4ee664c55be32d43e5fe3e3e26934e
- 0x242f033557fb7489665405d579ed03dd8e281f78c4444f4cdcad8c22a7c3877a
- 0xec3636adb23d262b10a0397cfcdd7fec388408b993dda6aa70e8e3de1461de96
- 0x7cb10268b4b5dc7acf59f00e4764d1c91b6e9dfd7437eb85db6e5fe6b5e1f5f7
- 0x395c2b2b756551fdd5542e5dba64d055f3d6e3fbaf767c1f4d033403af024fa7
- 0x6814d76316837fc6f77c62260addb61dcd780ec93e6b6cb2d11396923c670e2c
- 0x210883504a8db1389b91d85ae262a5f1314a8836242415405dafb269ba3f4900
- 0x2a68c46b8e4d47dfbc02abd4f2e679318ed73cf04bec95ec2bebc22e39cc388c
- 0x3107fa81688f3046afda2f948045d364316b247469a8a303ed99d9184e826a89
- 0x863ea2425c8cc958ae125e95c3e3170c9ac576a8c72849cb3f596e616b6fd6a8
- 0xd17258d4f01d074dcaf38f36218b36058144c3d50c3b488953a815c54d6674d2
- 0xe292b5a99219f136bce6647ce74b21240a1c7331d2475b1839220fd363c94217
- 0x3b4dba7d874fc323b0a364140a9c60f37bf547fe671897653118a9873fe03420
- 0x1a74ed3b3756b9cd946da49701bcec120ec88645013da99fa9eea60b39e1a570
- 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
- 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae