evm

package
v0.4.4 Latest Latest
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 Go to latest Published: Oct 13, 2021 License: GPL-3.0 Imports: 18 Imported by: 6

Documentation

Index

Constants

View Source 
const (
	// DefaultClientRPCURL is the RPC URL used by default, to interact with the
	// ethereum node.
	DefaultClientRPCURL = "http://127.0.0.1:8545/"
)

Variables

This section is empty.

Functions

func Encode 

func Encode(vals ...interface{}) []byte

Encode values into an Ethereum ABI compatible byte slice.

func NewAddressEncodeDecoder 

func NewAddressEncodeDecoder() address.EncodeDecoder

NewAddressEncodeDecoder constructs a new AddressEncodeDecoder.

Types

type Address 

type Address common.Address

An Address represents a public address on the Ethereum blockchain. It can be the address of an external account, or the address of a smart contract.

func NewAddressFromHex 

func NewAddressFromHex(str string) (Address, error)

NewAddressFromHex returns an Address decoded from a hex string.

func (Address) Bytes 

func (addr Address) Bytes() pack.Bytes

Bytes returns the address as a slice of 20 bytes.

func (Address) Marshal 

func (addr Address) Marshal(buf []byte, rem int) ([]byte, int, error)

Marshal the address to binary.

func (Address) MarshalJSON 

func (addr Address) MarshalJSON() ([]byte, error)

MarshalJSON implements JSON marshaling by encoding the address as a hex string.

func (Address) SizeHint 

func (Address) SizeHint() int

SizeHint returns the number of bytes needed to represent this address in binary.

func (Address) String 

func (addr Address) String() string

String returns the address as a human-readable hex string.

func (*Address) Unmarshal 

func (addr *Address) Unmarshal(buf []byte, rem int) ([]byte, int, error)

Unmarshal the address from binary.

func (*Address) UnmarshalJSON 

func (addr *Address) UnmarshalJSON(data []byte) error

UnmarshalJSON implements JSON unmarshaling by expected the data be a hex encoded string representation of an address.

type AddressDecoder 

type AddressDecoder interface {
	DecodeAddress(address.Address) (address.RawAddress, error)
}

AddressDecoder implements the address.Decoder interface.

func NewAddressDecoder 

func NewAddressDecoder() AddressDecoder

NewAddressDecoder constructs a new AddressDecoder.

type AddressEncodeDecoder 

type AddressEncodeDecoder struct {
	AddressEncoder
	AddressDecoder
}

AddressEncodeDecoder implements the address.EncodeDecoder interface

type AddressEncoder 

type AddressEncoder interface {
	EncodeAddress(address.RawAddress) (address.Address, error)
}

AddressEncoder implements the address.Encoder interface.

func NewAddressEncoder 

func NewAddressEncoder() AddressEncoder

NewAddressEncoder constructs a new AddressEncoder.

type Client 

type Client struct {
	EthClient *ethclient.Client
	RpcClient *rpc.Client
}

Client holds the underlying RPC client instance.

func NewClient 

func NewClient(rpcURL string) (*Client, error)

NewClient creates and returns a new JSON-RPC client to the Ethereum node

func (*Client) AccountBalance 

func (client *Client) AccountBalance(ctx context.Context, addr address.Address) (pack.U256, error)

AccountBalance returns the account balancee for a given address.

func (*Client) AccountNonce 

func (client *Client) AccountNonce(ctx context.Context, addr address.Address) (pack.U256, error)

AccountNonce returns the current nonce of the account. This is the nonce to be used while building a new transaction.

func (*Client) CallContract 

func (client *Client) CallContract(ctx context.Context, program address.Address, calldata contract.CallData) (pack.Bytes, error)

CallContract implements the multichain Contract API.

func (*Client) LatestBlock 

func (client *Client) LatestBlock(ctx context.Context) (pack.U64, error)

LatestBlock returns the block number at the current chain head.

func (*Client) SubmitTx 

func (client *Client) SubmitTx(ctx context.Context, tx account.Tx) error

SubmitTx to the underlying blockchain network.

func (*Client) Tx 

func (client *Client) Tx(ctx context.Context, txID pack.Bytes) (account.Tx, pack.U64, error)

Tx returns the transaction uniquely identified by the given transaction hash. It also returns the number of confirmations for the transaction.

type GasEstimator 

type GasEstimator struct {
	// contains filtered or unexported fields
}

A GasEstimator returns the gas price and the provide gas limit that is needed in order to confirm transactions with an estimated maximum delay of one block.

func NewGasEstimator 

func NewGasEstimator(client *Client) *GasEstimator

NewGasEstimator returns a simple gas estimator that fetches the ideal gas price for a ethereum transaction to be included in a block with minimal delay.

func (*GasEstimator) EstimateGas 

func (gasEstimator *GasEstimator) EstimateGas(ctx context.Context) (pack.U256, pack.U256, error)

EstimateGas returns an estimate of the current gas price and returns the gas limit provided. These numbers change with congestion. These estimates are often a little bit off, and this should be considered when using them.

type Payload 

type Payload struct {
	ABI  pack.Bytes `json:"abi"`
	Fn   pack.Bytes `json:"fn"`
	Data pack.Bytes `json:"data"`
}

A Payload is an Ethereum encoded function call. It includes an ABI, the function being called from the ABI, and the data being passed to the function.

type Tx 

type Tx struct {
	EthTx  *types.Transaction
	Signer types.Signer
}

Tx represents a ethereum transaction, encapsulating a payload/data and its Signer.

func (Tx) From 

func (tx Tx) From() address.Address

From returns the address that is sending the transaction. Generally, this is also the address that must sign the transaction.

func (Tx) Hash 

func (tx Tx) Hash() pack.Bytes

Hash returns the hash that uniquely identifies the transaction. Generally, hashes are irreversible hash functions that consume the content of the transaction.

func (Tx) Nonce 

func (tx Tx) Nonce() pack.U256

Nonce returns the nonce used to order the transaction with respect to all other transactions signed and submitted by the sender.

func (Tx) Payload 

func (tx Tx) Payload() contract.CallData

Payload returns arbitrary data that is associated with the transaction. Generally, this payload is used to send notes between external accounts, or invoke business logic on a contract.

func (Tx) Serialize 

func (tx Tx) Serialize() (pack.Bytes, error)

Serialize the transaction into bytes. Generally, this is the format in which the transaction will be submitted by the client.

func (Tx) Sighashes 

func (tx Tx) Sighashes() ([]pack.Bytes32, error)

Sighashes returns the digests that must be signed before the transaction can be submitted by the client.

func (*Tx) Sign 

func (tx *Tx) Sign(signatures []pack.Bytes65, pubkey pack.Bytes) error

Sign the transaction by injecting signatures for the required sighashes. The serialized public key used to sign the sighashes must also be specified.

func (Tx) To 

func (tx Tx) To() address.Address

To returns the address that is receiving the transaction. This can be the address of an external account, controlled by a private key, or it can be the address of a contract.

func (Tx) Value 

func (tx Tx) Value() pack.U256

Value being sent from the sender to the receiver.

type TxBuilder 

type TxBuilder struct {
	ChainID *big.Int
}

TxBuilder represents a transaction builder that builds transactions to be broadcasted to the ethereum network. The TxBuilder is configured using a chain id.

func NewTxBuilder 

func NewTxBuilder(chainID *big.Int) TxBuilder

NewTxBuilder creates a new transaction builder.

func (TxBuilder) BuildTx 

func (txBuilder TxBuilder) BuildTx(ctx context.Context, fromPubKey *id.PubKey, to address.Address, value, nonce, gasLimit, gasPrice, gasCap pack.U256, payload pack.Bytes) (account.Tx, error)

BuildTx receives transaction fields and constructs a new transaction.

Source Files

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