API Reference

Facades Overview

Facade	Underlying Contract	Purpose
Evm	ContractClient	Read & write contract functions
EvmRpc	RpcClient	Raw JSON-RPC calls & health snapshot
EvmSigner	Signer	Access signing address & key (private key usage)
EvmNonce	NonceManager	Track last used nonce locally
EvmFees	FeePolicy	Suggest & bump EIP-1559 fees
EvmLogs	LogFilterBuilder	Query & filter event logs

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ContractClient (via Evm)

Method	Args	Returns	Notes
at(address, abi)	string, array| string	self	Set target contract & ABI JSON/array
call(fn, args=[])	string, array	CallResult| mixed	eth_call; hex wrapped for decoding
sendAsync(fn, args=[], opts=[])	string, array, array	string	Dispatch async job; returns request UUID
wait(txHash, timeoutSec=120, pollMs=800)	string, int, int	array| null	Poll receipt until mined/timeout
estimateGas(data, from?)	string, ?string	int	Uses eth_estimateGas + padding

CallResult

Method	Returns	Description
raw()	string	Original 0x hex
as(type)	mixed	Decode basic ABI types (string, bytes, uint256/uint, int256/int, bool, address)
__toString()	string	Raw hex when cast to string

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RpcClient (via EvmRpc)

Method	Args	Returns	Notes
call(method, params=[])	string, array	mixed	Generic JSON-RPC request
health()	-	['chainId'=>int,'block'=>int]	Convenience status snapshot

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Signer (via EvmSigner)

Method	Returns	Notes
getAddress()	string	Public address derived from private key
privateKey()	string	Hex private key (handle securely)

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NonceManager (via EvmNonce)

Method	Args	Returns	Notes
last()	-	`int	null`
remember(nonce)	int	void	Store nonce after use

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FeePolicy (via EvmFees)

Method	Args	Returns	Notes
suggest()	-	['maxFeePerGas'=>string,'maxPriorityFeePerGas'=>string]	Initial fee suggestion
bump(previous, attempt)	array, int	array	Adjust fees for replacement

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LogFilterBuilder (via EvmLogs)

Start with EvmLogs::query() then chain:

Method	Args	Returns	Purpose
fromBlock(block)	int| string	self	Set starting block or 'latest'
toBlock(block)	int| string	self	Set end block or 'latest'
address(addrOrArray)	string| array	self	Filter by one or many contract addresses
event(signature)	string	self	Set topic0 = keccak256(signature)
eventByAbi(abiJson, name)	array| string, string	self	Resolve signature from ABI by function name
topic(index, value)	int, string	self	Exact match indexed topic
topicAny(index, values)	int, array	self	OR match on multiple values
topicWildcard(index)	int	self	Unset filter for that indexed slot
get()	-	array	Fetch raw logs array

Helpers:

Helper	Args	Returns	Description
padAddress(address)	string	string	Left-pad address to 32-byte topic value
decodeEvent(abiJson, log)	array|string, array	array	Decode indexed + non-indexed params

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Encoding Helpers

Class	Method	Returns	Use Case
Encoding	stringToBytes32(str)	string	Convert UTF-8 string to bytes32 padded hex

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Events

Event	When	Key Data
TxQueued	Job pushed	request_id, function, address
TxBroadcasted	First broadcast ok	tx_hash, nonce, fees
TxReplaced	Fee bump broadcast	old_tx_hash, new_tx_hash, attempt
TxMined	Receipt found	tx_hash, receipt
TxFailed	Terminal failure	reason, attempts
CallPerformed	Read executed	from, to, function, raw_result

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Configuration Highlights (config/evm.php)

Section	Key	Purpose
rpc_urls	list	Failover endpoints
chain_id	int	Network id (EIP-155)
signer.private_key	hex	Signing key
tx.estimate_padding	float	Gas safety multiplier
tx.confirm_timeout	int	Seconds before considering replacement
tx.max_replacements	int	Fee bump attempts limit
tx.poll_interval_ms	int	Receipt poll interval
tx.queue	string	Queue name for sendAsync jobs

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Worker Recommendation

Run one worker per signing key:

php artisan queue:work --queue=evm-send --sleep=0

Maintains nonce ordering; for scaling use a distributed nonce manager.

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Error Classes

Class	Trigger	Typical Cause
RpcException	RPC call fails	Network / endpoint error
GasException	Gas estimation failure	Revert, invalid data
SignerException	Signing issue	Bad key / chain mismatch

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Security Notes

• Never log private keys.
• Limit queue concurrency.
• Use multiple RPC endpoints for resilience.