Some Example Methods of the Ethereum Provider API
In this topic, we take a closer look at some methods of the Ethereum provider API. An extensive list of API endpoints can be found here https://eips.ethereum.org/EIPS/eip-1474.
- get the accounts
- get the coinbase address
- estimate gas consumption of a transaction
- get the balance of an address
- get the used protocol
You can find the complete code here:
<!DOCTYPE html>
<html>
<head>
<script>
window.addEventListener("load", (event)=>{
if(window.ethereum){
// Get Accounts
ethereum.request({method: 'eth_requestAccounts'}).then(function(res){
console.log("Accounts: " + res);
document.getElementById("accounts").innerHTML = "Accounts: " + res;
})
// Coinbase address
ethereum.request({method: "eth_coinbase"}).then(function(res){
console.log("Coinbase address: " + res);
document.getElementById("coinbase_address").innerHTML = "Coinbase address: " + res;
})
// estimate Gas of a transaction
estGasParams = [{
"data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675",
"from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
"gas": "0x76c0",
"gasPrice": "0x9184e72a000",
"to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
"value": "0x9184e72a"
}]
ethereum.request({method: 'eth_estimateGas', params: estGasParams}).then(function(res){
console.log("Gas estimation: " + res);
document.getElementById("gas_estimation").innerHTML = "Gas estimation: " + res;
})
// Requesting the balance of an address
ethereum.request({method: 'eth_getBalance', params: ['0x1102E22fF1F6F56Ed1B2E042959B5Ee90c62A29c', 'latest']}).then(function(res){
console.log("Balance: " + res);
document.getElementById("balance").innerHTML = "Balance: " + res;
})
// Requesting the transaction count sent from an address
params1 = ["0x1102E22fF1F6F56Ed1B2E042959B5Ee90c62A29c","latest",];
ethereum.request({method: 'eth_getTransactionCount', params: params1}).then(function(res){
console.log("TX Count: " + res);
document.getElementById("tx_count").innerHTML = "TX Count: " + res;
})
// Get the protocol of Ethereum
ethereum.request({method: 'eth_protocolVersion'}).then(function(res){
console.log("Protocol: " + res);
document.getElementById("protocol").innerHTML = "Protocol: " + res;
})
}else{
return false
}
})
</script>
</head>
<body>
<h1>Using the Provider API</h1>
<div id = "accounts"></div>
<div id = "coinbase_address"></div>
<div id = "gas_estimation"></div>
<div id = "balance"></div>
<div id = "tx_count"></div>
<div id = "protocol"></div>
</body>
</html>
