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reth.go
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reth.go
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package tokens
import (
"fmt"
"math/big"
"sync"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
"github.com/PatriceVignola/rocketpool-go/rocketpool"
"github.com/PatriceVignola/rocketpool-go/utils/eth"
)
//
// Core ERC-20 functions
//
// Get rETH total supply
func GetRETHTotalSupply(rp *rocketpool.RocketPool, opts *bind.CallOpts) (*big.Int, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return nil, err
}
return totalSupply(rocketTokenRETH, "rETH", opts)
}
// Get rETH balance
func GetRETHBalance(rp *rocketpool.RocketPool, address common.Address, opts *bind.CallOpts) (*big.Int, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return nil, err
}
return balanceOf(rocketTokenRETH, "rETH", address, opts)
}
// Get rETH allowance
func GetRETHAllowance(rp *rocketpool.RocketPool, owner, spender common.Address, opts *bind.CallOpts) (*big.Int, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return nil, err
}
return allowance(rocketTokenRETH, "rETH", owner, spender, opts)
}
// Estimate the gas of TransferRETH
func EstimateTransferRETHGas(rp *rocketpool.RocketPool, to common.Address, amount *big.Int, opts *bind.TransactOpts) (rocketpool.GasInfo, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return rocketpool.GasInfo{}, err
}
return estimateTransferGas(rocketTokenRETH, "rETH", to, amount, opts)
}
// Transfer rETH
func TransferRETH(rp *rocketpool.RocketPool, to common.Address, amount *big.Int, opts *bind.TransactOpts) (common.Hash, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return common.Hash{}, err
}
return transfer(rocketTokenRETH, "rETH", to, amount, opts)
}
// Estimate the gas of ApproveRETH
func EstimateApproveRETHGas(rp *rocketpool.RocketPool, spender common.Address, amount *big.Int, opts *bind.TransactOpts) (rocketpool.GasInfo, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return rocketpool.GasInfo{}, err
}
return estimateApproveGas(rocketTokenRETH, "rETH", spender, amount, opts)
}
// Approve a rETH spender
func ApproveRETH(rp *rocketpool.RocketPool, spender common.Address, amount *big.Int, opts *bind.TransactOpts) (common.Hash, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return common.Hash{}, err
}
return approve(rocketTokenRETH, "rETH", spender, amount, opts)
}
// Estimate the gas of TransferFromRETH
func EstimateTransferFromRETHGas(rp *rocketpool.RocketPool, from, to common.Address, amount *big.Int, opts *bind.TransactOpts) (rocketpool.GasInfo, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return rocketpool.GasInfo{}, err
}
return estimateTransferFromGas(rocketTokenRETH, "rETH", from, to, amount, opts)
}
// Transfer rETH from a sender
func TransferFromRETH(rp *rocketpool.RocketPool, from, to common.Address, amount *big.Int, opts *bind.TransactOpts) (common.Hash, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return common.Hash{}, err
}
return transferFrom(rocketTokenRETH, "rETH", from, to, amount, opts)
}
//
// rETH functions
//
// Get the rETH contract ETH balance
func GetRETHContractETHBalance(rp *rocketpool.RocketPool, opts *bind.CallOpts) (*big.Int, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return nil, err
}
return contractETHBalance(rp, rocketTokenRETH, opts)
}
// Get the ETH value of an amount of rETH
func GetETHValueOfRETH(rp *rocketpool.RocketPool, rethAmount *big.Int, opts *bind.CallOpts) (*big.Int, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return nil, err
}
ethValue := new(*big.Int)
if err := rocketTokenRETH.Call(opts, ethValue, "getEthValue", rethAmount); err != nil {
return nil, fmt.Errorf("Could not get ETH value of rETH amount: %w", err)
}
return *ethValue, nil
}
// Get the rETH value of an amount of ETH
func GetRETHValueOfETH(rp *rocketpool.RocketPool, ethAmount *big.Int, opts *bind.CallOpts) (*big.Int, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return nil, err
}
rethValue := new(*big.Int)
if err := rocketTokenRETH.Call(opts, rethValue, "getRethValue", ethAmount); err != nil {
return nil, fmt.Errorf("Could not get rETH value of ETH amount: %w", err)
}
return *rethValue, nil
}
// Get the current ETH : rETH exchange rate
func GetRETHExchangeRate(rp *rocketpool.RocketPool, opts *bind.CallOpts) (float64, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return 0, err
}
exchangeRate := new(*big.Int)
if err := rocketTokenRETH.Call(opts, exchangeRate, "getExchangeRate"); err != nil {
return 0, fmt.Errorf("Could not get rETH exchange rate: %w", err)
}
return eth.WeiToEth(*exchangeRate), nil
}
// Get the total amount of ETH collateral available for rETH trades
func GetRETHTotalCollateral(rp *rocketpool.RocketPool, opts *bind.CallOpts) (*big.Int, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return nil, err
}
totalCollateral := new(*big.Int)
if err := rocketTokenRETH.Call(opts, totalCollateral, "getTotalCollateral"); err != nil {
return nil, fmt.Errorf("Could not get rETH total collateral: %w", err)
}
return *totalCollateral, nil
}
// Get the rETH collateralization rate
func GetRETHCollateralRate(rp *rocketpool.RocketPool, opts *bind.CallOpts) (float64, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return 0, err
}
collateralRate := new(*big.Int)
if err := rocketTokenRETH.Call(opts, collateralRate, "getCollateralRate"); err != nil {
return 0, fmt.Errorf("Could not get rETH collateral rate: %w", err)
}
return eth.WeiToEth(*collateralRate), nil
}
// Estimate the gas of BurnRETH
func EstimateBurnRETHGas(rp *rocketpool.RocketPool, amount *big.Int, opts *bind.TransactOpts) (rocketpool.GasInfo, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return rocketpool.GasInfo{}, err
}
return rocketTokenRETH.GetTransactionGasInfo(opts, "burn", amount)
}
// Burn rETH for ETH
func BurnRETH(rp *rocketpool.RocketPool, amount *big.Int, opts *bind.TransactOpts) (common.Hash, error) {
rocketTokenRETH, err := getRocketTokenRETH(rp)
if err != nil {
return common.Hash{}, err
}
hash, err := rocketTokenRETH.Transact(opts, "burn", amount)
if err != nil {
return common.Hash{}, fmt.Errorf("Could not burn rETH: %w", err)
}
return hash, nil
}
//
// Contracts
//
// Get contracts
var rocketTokenRETHLock sync.Mutex
func getRocketTokenRETH(rp *rocketpool.RocketPool) (*rocketpool.Contract, error) {
rocketTokenRETHLock.Lock()
defer rocketTokenRETHLock.Unlock()
return rp.GetContract("rocketTokenRETH")
}