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args.go
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args.go
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// Copyright © 2019 Weald Technology Trading
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package funcparser
import (
"errors"
"github.com/antlr4-go/antlr/v4"
"github.com/ethereum/go-ethereum/accounts/abi"
"github.com/ethereum/go-ethereum/ethclient"
"github.com/wealdtech/ethereal/v2/util"
"github.com/wealdtech/ethereal/v2/util/funcparser/parser"
)
// ParseCall parses a call string and returns a suitable Method.
func ParseCall(client *ethclient.Client, contract *util.Contract, call string) (*abi.Method, []interface{}, error) {
if contract == nil {
return nil, nil, errors.New("no contract")
}
is := antlr.NewInputStream(call)
lexer := parser.NewFuncLexer(is)
stream := antlr.NewCommonTokenStream(lexer, antlr.TokenDefaultChannel)
tree := parser.NewFuncParser(stream).Start_()
methodListener := newMethodListener(client, contract)
antlr.ParseTreeWalkerDefault.Walk(methodListener, tree)
return methodListener.method, methodListener.args, methodListener.err
}