60 lines
1.7 KiB
Go
60 lines
1.7 KiB
Go
package vaa
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import (
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"encoding/binary"
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"fmt"
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"time"
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"golang.org/x/crypto/sha3"
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)
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var GovernanceEmitter = Address{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4}
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var GovernanceChain = ChainIDSolana
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func CreateGovernanceVAA(timestamp time.Time, nonce uint32, sequence uint64, guardianSetIndex uint32, payload []byte) *VAA {
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vaa := &VAA{
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Version: SupportedVAAVersion,
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GuardianSetIndex: guardianSetIndex,
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Signatures: nil,
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Timestamp: timestamp,
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Nonce: nonce,
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Sequence: sequence,
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ConsistencyLevel: 32,
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EmitterChain: GovernanceChain,
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EmitterAddress: GovernanceEmitter,
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Payload: payload,
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}
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return vaa
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}
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// Compute the hash for cosmwasm contract instatiation params.
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// The hash is keccak256 hash(hash(hash(BigEndian(CodeID)), Label), Msg).
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// We compute the nested hash so there is no chance of bytes leaking between CodeID, Label, and Msg.
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func CreateInstatiateCosmwasmContractHash(codeId uint64, label string, msg []byte) [32]byte {
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var expected_hash [32]byte
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// hash(BigEndian(CodeID))
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var codeId_hash [32]byte
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keccak := sha3.NewLegacyKeccak256()
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if err := binary.Write(keccak, binary.BigEndian, codeId); err != nil {
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panic(fmt.Sprintf("failed to write binary data (%d): %v", codeId, err))
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}
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keccak.Sum(codeId_hash[:0])
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keccak.Reset()
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// hash(hash(BigEndian(CodeID)), Label)
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var codeIdLabel_hash [32]byte
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keccak.Write(codeId_hash[:])
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keccak.Write([]byte(label))
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keccak.Sum(codeIdLabel_hash[:0])
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keccak.Reset()
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// hash(hash(hash(BigEndian(CodeID)), Label), Msg)
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keccak.Write(codeIdLabel_hash[:])
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keccak.Write(msg)
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keccak.Sum(expected_hash[:0])
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return expected_hash
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}
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