PrepareTx

prepareTx InjectiveExchangeRPC

PrepareTx generates a Web3-signable body for a Cosmos transaction

POSThttps://inj-indexer.nownodes.io/api/exchange/gateway/v1/prepareTx

Body

application/json

chainIDinteger

Specify chainID for the target tx

Example: 1

feeCosmosTxFee (object)

memostring

Textual memo information to attach with tx

Example: ""

msgsarray of string (binary)

List of Cosmos proto3-encoded Msgs to include in a single tx

sequenceinteger

Account sequence number (nonce) of signer

Example: 0

signerAddressstring

Specify Ethereum address of a signer

Example: "0x3c8f1388687bf35a65f488934cdf05e45711f47e"

Pattern: ^0x[0-9a-fA-F]{40}$

timeoutHeightinteger

Block height until which the transaction is valid.

Example: 0

Response

200404500

OK response.

Body

application/json

data*string

EIP712-compatible message suitable for signing with eth_signTypedData_v4

Example: "TODO"

feePayerstring

Fee payer address provided by service

Example: "inj1cml96vmptgw99syqrrz8az79xer2pcgp0a885r"

Pattern: ^inj1[0-9a-zA-Z]{38}$

feePayerSigstring

Hex-encoded ethsecp256k1 signature bytes from fee payer

Example: "0x1f5630186eacde746784d176d4ea9d6a2f78e3a3ea8ce9933e4707fc2dfac7aa"

Pattern: ^0x(([0-9a-fA-F][0-9a-fA-F])+)?$

pubKeyType*string

Specify proto-URL of a public key, which defines the signature format

Example: "/injective.crypto.v1beta1.ethsecp256k1.PubKey"

sequence*integer

Account tx sequence (nonce)

Example: 5

signMode*string

Sign mode for the resulting tx

Example: "SIGN_MODE_LEGACY_AMINO_JSON"

Request

JavaScriptCurlPython

const response = await fetch('https://inj-indexer.nownodes.io/api/exchange/gateway/v1/prepareTx', {
    method: 'POST',
    headers: {
      "Content-Type": "application/json"
    },
    body: JSON.stringify({
      "chainID": 1,
      "fee": {
        "delegateFee": false,
        "gas": 200000,
        "price": [
          {
            "amount": "10000000000000000000",
            "denom": "inj"
          },
          {
            "amount": "10000000000000000000",
            "denom": "inj"
          }
        ]
      },
      "memo": "",
      "msgs": [
        "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"
      ],
      "sequence": 0,
      "signerAddress": "0x3c8f1388687bf35a65f488934cdf05e45711f47e",
      "timeoutHeight": 0
    }),
});
const data = await response.json();

Response

200404500

{
  "data": "TODO",
  "feePayer": "inj1cml96vmptgw99syqrrz8az79xer2pcgp0a885r",
  "feePayerSig": "0x1f5630186eacde746784d176d4ea9d6a2f78e3a3ea8ce9933e4707fc2dfac7aa",
  "pubKeyType": "/injective.crypto.v1beta1.ethsecp256k1.PubKey",
  "sequence": 5,
  "signMode": "SIGN_MODE_LEGACY_AMINO_JSON"
}