Explorer
Syncing—

Transaction DecodingService

tx-decoding

Decode an EVM transaction or raw calldata into its function and named, typed arguments. POST JSON {"chain_id": 1, "tx_hash": "0x..."} or {"calldata": "0x...", "to": "0x..."} to /v1/tool, or GET /v1/decode?tx_hash=...; chains: Ethereum (1), Optimism (10), BNB Chain (56), Polygon (137), Base (8453), Arbitrum (42161). Decoding uses the target contract's verified ABI from Sourcify (for a proxy, the implementation's), otherwise 4byte.directory signatures. The response is a JSON object with function, signature, args (name, type, value; unlimited amounts marked), erc20_transfer, value_wei, human_summary, confidence (high, medium, low or unknown), candidates and abi_source. Unknown selectors are never guessed.

Active Suppliers
2
of 2 ever configured
Service Info
Service ID
tx-decoding
Compute Units / Relay
100,000
Owner
pokt10…87pn
Active Applications
2
Relay Mining EMA
1 relays
Service Metadata Cardsource: on-chain metadata (LCD)
{10 items
"schema":"pocket-service-card/v1"
"description":"Decode an EVM transaction or raw calldata into its function and named, typed arguments. POST JSON {"chain_id": 1, "tx_hash": "0x..."} or {"calldata": "0x...", "..."
"rpc_types":[1 item
0:{4 items
"type":"REST"
"intent":"expected"
"backend_hint":"tx-decoding HTTP server on :8080; POST /v1/tool (POST / also reaches it through the relay), GET /v1/health + /v1/version."
"notes":"Every response is a JSON object; errors are JSON 4xx with an error field."
}
]
"apis":[1 item
0:"evm-decode-api"
]
"specs":[1 item
0:{4 items
"kind":"openapi"
"api":"evm-decode-api"
"url":"https://services.supnodes.com/specs/tx-decoding/openapi.json"
"notes":"Machine-readable OpenAPI 3.0.3 contract for this service, with example requests."
}
]
"access":"public"
"results":"variable"
"serving":{7 items
"backend":"Single-process Python 3 HTTP server, standard library only, behind a RelayMiner (rest backend). No auth toward the backend; callers cannot send headers. Reads t..."
"implementations":[1 item
0:"tx-decoding >= 1.0"
]
"docs":"https://services.supnodes.com/specs/tx-decoding/README.md"
"min_disk_gb":1
"min_ram_gb":1
"healthcheck":[3 items
0:{4 items
"rpc_type":"REST"
"request":{2 items
"path":"/v1/version"
"method":"GET"
}
"expect":{2 items
"json_path":"$.service"
"matches":"^tx-decoding$"
}
"notes":"Identity probe: pins the backend to this service so a wrong backend cannot be staked under this id."
}
1:{4 items
"rpc_type":"REST"
"request":{2 items
"path":"/v1/health"
"method":"GET"
}
"expect":{2 items
"json_path":"$.status"
"matches":"^ok$"
}
"notes":"Readiness probe."
}
2:{4 items
"rpc_type":"REST"
"request":{3 items
"path":"/v1/tool"
"method":"POST"
"body":{1 item
"calldata":"0xa9059cbb000000000000000000000000d8da6bf26964af9d7eed9e03e53415d37aa9604500000000000000000000000000000000000000000000000000000000000f4240"
}
}
"expect":{2 items
"json_path":"$.function"
"matches":"^transfer$"
}
"notes":"Functional probe: an ERC-20 transfer call; one signature lookup."
}
]
"notes":"Upstreams are public APIs (RPC, Sourcify, 4byte.directory) that may rate-limit. Gateway operators: configure as type passthrough with rpc_types ["rest"]."
}
"docs":"https://services.supnodes.com/specs/tx-decoding/README.md"
"updated":"2026-09-26"
}