class

EthereumRpc

Minimal Ethereum JSON-RPC client backed by the Crystal stdlib.

Constants

TransferTopic = "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef"

keccak256("Transfer(address,address,uint256)")

new(endpoint : String, api_key : String | Nil = nil, timeout : Time::Span = 30.seconds)

json_to_u64(v : JSON::Any) : UInt64

balance(address : String, block : String = "latest") : BigInt

block_number

call(method : String, params : String) : JSON::Any

Sends a JSON-RPC request. params must be raw JSON (an array).

endpoint

eth_call(to : String, calldata : String, block : String = "latest") : String

hex_to_big(hex : String) : BigInt

hex_to_u64(hex : String) : UInt64

hex_to_utf8(hex : String) : String

json_to_u64(v : JSON::Any) : UInt64

progress=(reporter : Progress | Nil)

Ticked once per completed JSON-RPC request; see Progress.

token_decimals(address : String) : Int32 | Nil

token_symbol(address : String) : String | Nil