package bsc import ( "context" "git.lehouerou.net/laurent/evm" "git.lehouerou.net/laurent/evm/bsc/contracts" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/core/types" "github.com/pkg/errors" "github.com/shopspring/decimal" ) type WBNB struct { evm.Token client evm.Client contract *contracts.WBnb } func NewWBNB(address string, client evm.Client) (*WBNB, error) { t, err := evm.NewToken(client, common.HexToAddress(address)) if err != nil { return nil, errors.Wrap(err, "init token contract") } c, err := contracts.NewWBnb(common.HexToAddress(address), client) if err != nil { return nil, errors.Wrap(err, "init wbnb contract") } return &WBNB{ Token: t, client: client, contract: c, }, nil } func (w *WBNB) UnwrapWBNB(ctx context.Context, amount decimal.Decimal) (evm.Transaction, error) { return w.client.Execute(ctx, func(ctx context.Context, opts *evm.TransactOpts) (*types.Transaction, error) { return w.contract.Withdraw(opts.TransactOpts, w.ValueToBigInt(amount)) }) }