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Cosmos & Cosmos compatible network

Sign Transaction

The D'CENT Web SDK provides functions for signing transaction of coins.

getCosmosSignedTransaction()

Supported Coin Type

  • COSMOS(ATOM)
  • COREUM(CORE)

Parameters

  • unsignedTx: unsigned hexadecimal tx Cosmos Docs
  • path: key path, wallet sign with that private key with a given key path (BIP32 ex) "m/44'/118'/0'/0/0").
  • fee: fee, It is fee that wallet displays on the screen.
  • symbol: symbol, It is a symbol that the wallet displays on the screen.
  • decimals: cosmos or coreum's decimals.

Requirements

  • D'CENT Bridge version 1.5.0 or higher is required.
  • D'CENT Biometric Wallet version 2.21.0 or higher is required.
    • COREUM: 2.25.0 or higher is required.

Useage

import message from "@cosmostation/cosmosjs/src/messages/proto";
// signDoc = (1)txBody + (2)authInfo
// ---------------------------------- (1)txBody ----------------------------------
const pubKeyAny = new message.google.protobuf.Any({
type_url: '/cosmos.crypto.secp256k1.PubKey',
value: Buffer.from('0a21ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff', 'hex') //temp value
})
const msgSend = new message.cosmos.bank.v1beta1.MsgSend({
from_address: recAddress,
to_address: toAddress,
amount: [{ denom: "uatom", amount: String(100000) }] // 6 decimal places (1000000 uatom = 1 ATOM)
});
const msgSendAny = new message.google.protobuf.Any({
type_url: "/cosmos.bank.v1beta1.MsgSend",
value: message.cosmos.bank.v1beta1.MsgSend.encode(msgSend).finish()
});
const txBody = new message.cosmos.tx.v1beta1.TxBody({ messages: [msgSendAny], memo: "" });
// --------------------------------- (2)authInfo ---------------------------------
const signerInfo = new message.cosmos.tx.v1beta1.SignerInfo({
public_key: pubKeyAny,
mode_info: { single: { mode: message.cosmos.tx.signing.v1beta1.SignMode.SIGN_MODE_DIRECT } },
sequence // nonce
});
const feeValue = new message.cosmos.tx.v1beta1.Fee({
amount: [{ denom: "uatom", amount: String(5000) }],
gas_limit: 200000
});
const authInfo = new message.cosmos.tx.v1beta1.AuthInfo({ signer_infos: [signerInfo], fee: feeValue });
const bodyBytes = message.cosmos.tx.v1beta1.TxBody.encode(txBody).finish()
const authInfoBytes = message.cosmos.tx.v1beta1.AuthInfo.encode(authInfo).finish()
const signDoc = new message.cosmos.tx.v1beta1.SignDoc({
body_bytes: bodyBytes,
auth_info_bytes: authInfoBytes,
chain_id,
account_number,
})
let signMessage = message.cosmos.tx.v1beta1.SignDoc.encode(signDoc).finish()
const sigHash = Buffer.from(signMessage).toString('hex')
const transactionJson = {
coinType: DcentWebConnector.coinType.COSMOS, // or COREUM
sigHash: sigHash,
path: `m/44'/118'/0'/0/0`, // (COREUM -> m/44'/990'/0'/0/0)
decimals, // 6
fee,
symbol: 'ATOM', // (COREUM -> CORE)
}
var result
try {
result = await DcentWebConnector.getCosmomsSignedTransaction(transactionJson);
} catch (e) {
console.log(e)
result = e
}

Returned response object

{
"header": {
"version": "1.0",
"response_from": "cosmos",
"status": "success"
},
"body": {
"command": "transaction",
"parameter": {
"signed_tx": "0x31aa13b5e04cb6fc6381ea0520bf7f6727ebdb6e96cd7ca8625bb3e3dd36cf0e2cee4ece13aa9f7ddc09ee10c74aa00af954201829d8016317f10f5a921dcc0d",
"pubkey": "0x0202903dcb31139bf92e096c3ec85fb9a94ab7dbf02d6234ded604d15ee9650480"
}
}
}