← The evidence ledger
Evidence row 119520
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://saylorinnovations.com/api/chain/verify-1271
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- e8f1342e007eb813ba64f9fee9037c08099f432da401816c8524d3ef90152e6e
- Leaf
- 0x17ab970ac93508ae939a270f008d2d13d3a14b41143cfd74e60656e55974b5d0
What was observed
{
"endpoints": [
[
"x402",
"https://saylorinnovations.com/api/chain/verify-1271"
]
],
"name": "Saylor Innovations Data Desk",
"owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:chain-verify-127",
"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:chain-verify-127",
"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:chain-verify-127",
"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": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
"memo": "saylor:datadesk:chain-verify-127",
"reference": "6N1oFn4WT7Sw5hmcvKbZf72FuC4TSGizC3Ph8MYLrQwq",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi12ZXJpZnktMTI3MSIsInJlZmVyZW5jZSI6IjZOMW9GbjRXVDdTdzVobWN2S2JaZjcyRnVDNFRTR2l6QzNQaDhNWUxyUXdxIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI3MjIxOTY3ODV9.wnE00MsA4atplFLZGUti_cpBZrPVuN9GRBNyEL7QloQ"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
"memo": "saylor:datadesk:chain-verify-127",
"reference": "3FqjH425ns4XTHYHR6xYcnPaPaXyiqUWU4Lc5qTArzA4",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi12ZXJpZnktMTI3MSIsInJlZmVyZW5jZSI6IjNGcWpINDI1bnM0WFRIWUhSNnhZY25QYVBhWHlpcVVXVTRMYzVxVEFyekE0IiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRXM5dk1GcnphQ0VSbUpmckY0SDJGWUQ0S0NvTmtZMTFNY0NlOEJlbndOWUIiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI3MjIxOTY3ODV9.majDQzOUXHP3HmMAtbOyNLVWRB6LKgF6WlUtUTciKS4"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "93286",
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:chain-verify-127",
"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": "96172",
"reference": "9uYLhxp2fLW6AHajGAWKKB9TwEL8ft8EhXt825JQBKnJ",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi12ZXJpZnktMTI3MSIsInJlZmVyZW5jZSI6Ijl1WUxoeHAyZkxXNkFIYWpHQVdLS0I5VHdFTDhmdDhFaFh0ODI1SlFCS25KIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjpudWxsLCJtaW5BbW91bnQiOjkzMjg2LCJleHAiOjE3OTI3MjIxOTY3ODV9.VLoEnoJ4riLkVF28_iSeb68OG_OlbXagIwvrfyEnQ6U",
"solUsdPrice": 103.98
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
}
],
"description": "Verify a smart contract wallet signature (ERC-1271) on 16 EVM chains for Safe, account abstraction and other multisig wallets via isValidSignature.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"chain": "ethereum",
"contract": "0x849D52316331967b6fF1198e5E32A0eB168D039d",
"hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"signature": "0x00"
},
"type": "http"
},
"output": {
"example": {
"chain": "ethereum",
"chain_id": 1,
"contract": "0x849D52316331967b6fF1198e5E32A0eB168D039d",
"hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"note": "The wallet contract reverted when asked to validate the signature, so it does not implement ERC-1271 or rejected the input.",
"returned_value": null,
"reverted": true,
"signature_bytes": 1,
"source": "Chain JSON-RPC (ethereum)",
"valid": false
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"chain": {
"description": "chain name (ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, gnosis, linea, scroll, mantle, blast, sonic, celo, berachain, unichain) or chain id",
"type": "string"
},
"contract": {
"description": "the smart-contract wallet that should have signed",
"type": "string"
},
"hash": {
"description": "the 32-byte digest that was signed, as 0x hex",
"type": "string"
},
"signature": {
"description": "the signature bytes as 0x hex (format depends on the wallet)",
"type": "string"
}
},
"required": [
"chain",
"contract",
"hash",
"signature"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"chain": {
"description": "the chain name that was queried",
"type": "string"
},
"chain_id": {
"description": "EIP-155 chain id of that network",
"type": "number"
},
"contract": {
"description": "the smart-contract wallet checked",
"type": "string"
},
"hash": {
"description": "the digest that was signed",
"type": "string"
},
"note": {
"description": "plain-language reading of the result, including units",
"type": "string"
},
"returned_value": {
"description": "first four bytes the wallet returned",
"type": [
"string",
"null"
]
},
"reverted": {
"description": "true when the wallet call failed",
"type": "boolean"
},
"signature_bytes": {
"description": "length of the signature",
"type": "number"
},
"source": {
"description": "where the data was read from",
"type": "string"
},
"valid": {
"description": "true when the wallet accepted the signature",
"type": "boolean"
}
},
"required": [
"chain",
"chain_id",
"contract",
"hash",
"valid",
"reverted",
"note",
"source"
],
"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/v1792548358/bazaar-icons/bc5e2b3d111ebbef.jpg",
"lastUpdated": "2026-10-23T02:21:16.819Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-23T02:21:16.523Z"
},
"resource": "https://saylorinnovations.com/api/chain/verify-1271",
"serviceName": "Saylor Innovations Data Desk",
"tags": [
"erc1271 signature check",
"smart wallet signature",
"safe signature verify",
"isvalidsignature call",
"contract wallet auth"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Verify a smart contract wallet signature (ERC-1271) on 16 EVM chains for Safe, account abstraction and other multisig wallets via isValidSignature."
}What the leaf hashes
{"body":"e8f1342e007eb813ba64f9fee9037c08099f432da401816c8524d3ef90152e6e","id":119520,"kind":"listing","method":"baseline/1","observed_us":1793025615758300,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/chain/verify-1271","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).
- 0x17ab0c2699560c8d327e73348a11a4c73f8b160ac8e35405a125c0c25735a6a2
- 0xf7530105c04ea0113d177e9d74535508b2904c0aff5d58c79e834bc70ce8e084
- 0x59eaf4b5e81c79e71910a56ade7f0ba8db8251d6e87ad795a1960d9731110a20
- 0xdcd28ad5880e192bd3efc272e87f5751d1639180e880ca2a69bdac1d71828c28
- 0x42e536897f08e04a9c701a03bdbcf1ea6899a4b05681db9afc402cde98abee5c
- 0x3a269f74229ec4d76fe55c699cbe8ddcb1fd5746c990d8b9020eb85fda542c9e
- 0x39d9f0575bec2f85fd1a718e675e633f33c0d4df2f58dfd080985195a6a65c5b
- 0xba5e563cc870de4e3907ba4cbe7ff97ca668343fb28be26f870041d1b6c1769e
- 0x7f0f0d38564656173bda7241db92a0622251ea43e823cbcb8c95d9f874246bc5
- 0x0d4fc8ebd9dad99184207670597ef1933fa15a1f2659bf0e662e21ebef5f0e51
- 0x84d28434d4d3c4d17b89916035448fc07d9ad132609b14e307edbe020e19d1a6
- 0x15eab8feed5b3f08165d63b9f1aed508c0624966a05349e051f86f0c188707b5
- 0x32f46c5f73ecbfd4f770f7f760a79bee2afed4b3e7572fa882b3e7dce8df4356
- 0x770e4376196188c7fc9ec40f8e218dc0d1cb92bba5fe0425a0edce27ca9a997f
- 0x60582ab4b41e72eb70eb0bce07fbf0fb4d2b62a8bad5be50f5d16d511adc746c
- 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
- 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae