Hey Everyone,
This will be a quick post.
It’s been awhile since I made a post on some of the interesting challenges I’ve faced on my side projects. This is a continuation of my blockchain restapi work first mentioned here: dash-node-error.
Not just limiting myself to running nodes, I wanted to experiment with using existing apis. I started off with the Ripple (XRP) api. The main two pieces of information I needed from the chain were a list of transactions and an address’ balance.
Perusing through the api, there appeared to be two existing apis that would suit my needs:
Get Account Balances - GET /v2/accounts/{:address}/balances
Get Account Transaction History - GET /v2/accounts/{:address}/transactions
The balances endpoint worked as expected. Below is an example url and response:
URL: https://data.ripple.com/v2/accounts/rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn/balances?currency=USD
{
"result": "success",
"ledger_index": ,
"limit": 200,
"balances": [
{
"currency": "XRP",
"value": "200"
},
]
}
The transactions endpoint; however, had incomplete data. Example url:
https://data.ripple.com/v2/accounts//transactions?type=Payment
I noticed the transaction inputs did not add up to the account balance. After a bit of digging, the only thing I was able to find was that transactions were missing from exchanges that used sidechains. The solution for me was to merge data from the /payments endpoint. This allowed transaction data to mirror balances.
URL: https://data.ripple.com/v2/accounts/rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn/payments?currency=USD
{
"result": "success",
"count": 3,
"marker": "rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn|20140910232220|000008803725|00001",
"payments": [
{
"amount": "1.0",
"delivered_amount": "1.0",
"destination_balance_changes": [
{
"counterparty": "rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn",
"currency": "USD",
"value": "1"
}
],
"source_balance_changes": [
{
"counterparty": "ra5nK24KXen9AHvsdFTKHSANinZseWnPcX",
"currency": "USD",
"value": "-1"
}
],
"tx_index": 1,
"currency": "USD",
"destination": "ra5nK24KXen9AHvsdFTKHSANinZseWnPcX",
"executed_time": "2014-06-02T22:47:50Z",
"issuer": "rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn",
"ledger_index": 6979192,
"source": "rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn",
"source_currency": "USD",
"tx_hash": "7BF105CFE4EFE78ADB63FE4E03A851440551FE189FD4B51CAAD9279C9F534F0E",
"transaction_cost": "1.0E-5"
}
]
}