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[Transaction] eth_fillTransaction

Fills the defaults (nonce, gas, gasPrice or 1559 fields) on a given unsigned transaction, and returns it to the caller for further processing (signing + broadcast).

JSONRPC: eth_fillTransaction

Request

application/json

Body

params

object[]

An object of transaction arguments. See the table below for the object's properties.

Array [

from 20-byte DATArequired

The address from which the transaction is sent.

to 20-byte DATA

(not required when creating a new contract) The address to which the transaction is directed.

gas hex

(optional) The integer of the gas provided for the transaction's execution. It will return unused gas.

maxFeePerGas hex

(optional, default: 250 ston) The maximum amount to pay for the transaction's execution. Since Kaia uses a fixed gas price, it must be set to 250 ston (Gpeb in Ethereum).

maxPriorityFeePerGas hex

(optional, default: 250 ston) Gas tip cap for dynamic fee transaction in peb. Since Kaia uses a fixed gas price, it must be set to 250 ston (Gpeb in Ethereum).

input DATA

(optional) The hash of the method signature and the encoded parameter. It replaces data field, but 'data` field is still supported for backward compatibility.

value hex

(optional) The integer of values sent with this transaction.

nonce hex

(optional) The integer of a nonce.

]

Responses

200

Return a rawTransaction string and a transaction object.

application/json

Schema

Schema

error

object

code int64required

A Number that indicates the error type that occurred. This MUST be an integer.

code	message	description
-32700	Parse error	invalid JSON was received by the server. An error occurred on the server while parsing the JSON text.
-32602	Invalid params	Invalid method parameter(s).

message string

A String providing a short description of the error. The message SHOULD be limited to a concise single sentence.

data string

A Primitive or Structured value that contains additional information about the error. This may be omitted. The value of this member is defined by the Server (e.g. detailed error information, nested errors etc.).

result

object

raw stringrequired

A rawTransaction string (a RLP-encoded transaction string).

tx

object

required

type hexrequired

An integer representing the type of the transaction.

nonce hexrequired

The block number where this transaction was in.

gasPrice hexnullablerequired

Gas price provided by the sender in peb. null when it is not a legacy transaction.

maxFeePerGas hexnullablerequired

A maximum amount to pay for the transaction to execute. null when it is a legacy transaction.

maxPriorityFeePerGas hexnullablerequired

Gas tip cap for dynamic fee transaction in peb. null when it is a legacy transaction.

gas hexrequired

Gas provided by the sender.

value hexrequired

Integer of values sent with this transaction.

v hexrequired

ECDSA recovery id.

r 32-byte DATArequired

ECDSA signature r.

s 32-byte DATArequired

ECDSA signature s.

chainId hexrequired

Chain id set on the requested node.

accessList string[]required

An array of accessList.

hash 32-byte DATArequired

Hash of the transaction.

Example (from schema)

{
  "jsonrpc": "2.0",
  "id": 0,
  "error": {
    "code": -32700,
    "message": "Parse error",
    "data": "string"
  },
  "result": {
    "raw": "0x02ef8302edaf808505d21dba008505d21dba00829999948c9f4468ae04fb3d79c80f6eacf0e4e1dd21deee0180c0808080",
    "tx": {
      "type": "0x2",
      "nonce": "0x0",
      "gasPrice": null,
      "maxPriorityFeePerGas": "0x5d21dba00",
      "maxFeePerGas": "0x5d21dba00",
      "gas": "0x9999",
      "value": "0x1",
      "input": "0x",
      "v": "0x0",
      "r": "0x0",
      "s": "0x0",
      "to": "0x8c9f4468ae04fb3d79c80f6eacf0e4e1dd21deee",
      "chainId": "0x2edaf",
      "accessList": [],
      "hash": "0x83e382bfb39249dc0e2b4283702bc1c0685deffad1316d166546da9c4c14c59d"
    }
  }
}

• curl
• python
• nodejs
• java

• Curl

curl -X 'POST' \
  'https://public-en-kairos.node.kaia.io' \
  -H 'accept: application/json' \
  -H 'Content-Type: application/json' \
  -d '{
  "method": "eth_fillTransaction",
  "id": 1,
  "jsonrpc": "2.0",
  "params": [
    {
      "from": "0x51239f87c33e95e3bdb72e31d06b5306bcec81cc",
      "to": "0x8c9f4468ae04fb3d79c80f6eacf0e4e1dd21deee",
      "value": "0x1",
      "gas": "0x9999",
      "maxFeePerGas": "0xbb43b7400"
    }
  ]
}'

• CURL

curl -L 'https://public-en-kairos.node.kaia.io/' \
-H 'Content-Type: application/json' \
-H 'Accept: application/json' \
-d '{
  "method": "eth_fillTransaction",
  "id": 1,
  "jsonrpc": "2.0",
  "params": [
    {
      "from": "0xca7a99380131e6c76cfa622396347107aeedca2d",
      "to": "0x8c9f4468ae04fb3d79c80f6eacf0e4e1dd21deee",
      "value": "0x1",
      "gas": "0x9999",
      "maxFeePerGas": "0x5d21dba00"
    }
  ]
}'

Request Collapse all

Base URL

https://public-en-kairos.node.kaia.io

Body

{
  "method": "eth_fillTransaction",
  "id": 1,
  "jsonrpc": "2.0",
  "params": [
    {
      "from": "0xca7a99380131e6c76cfa622396347107aeedca2d",
      "to": "0x8c9f4468ae04fb3d79c80f6eacf0e4e1dd21deee",
      "value": "0x1",
      "gas": "0x9999",
      "maxFeePerGas": "0x5d21dba00"
    }
  ]
}

ResponseClear

Click the Send API Request button above and see the response here!