github.com/Blockdaemon/celo-blockchain@v0.0.0-20200129231733-e667f6b08419/common/abi.go (about)

     1  // Copyright 2014 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package common
    18  
    19  import (
    20  	"math/big"
    21  )
    22  
    23  func AddressToAbi(address Address) []byte {
    24  	return LeftPadBytes(address.Bytes(), 32)
    25  }
    26  
    27  func AmountToAbi(amount *big.Int) []byte {
    28  	return LeftPadBytes(amount.Bytes(), 32)
    29  }
    30  
    31  // Generates ABI for a given method and its arguments.
    32  func GetEncodedAbi(methodSelector []byte, varAbis [][]byte) []byte {
    33  	encodedVarsAbiByteSize := 0
    34  	for _, varAbi := range varAbis {
    35  		encodedVarsAbiByteSize += len(varAbi)
    36  	}
    37  	encodedAbi := make([]byte, len(methodSelector)+encodedVarsAbiByteSize)
    38  
    39  	copy(encodedAbi[0:len(methodSelector)], methodSelector[:])
    40  
    41  	copyCursor := len(methodSelector)
    42  	for _, varAbi := range varAbis {
    43  		copy(encodedAbi[copyCursor:copyCursor+len(varAbi)], varAbi[:])
    44  		copyCursor += len(varAbi)
    45  	}
    46  
    47  	return encodedAbi
    48  }