81 lines
2.0 KiB
Go
81 lines
2.0 KiB
Go
package helpers
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import (
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"math/rand"
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"time"
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"github.com/cosmos/cosmos-sdk/client"
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cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/types/simulation"
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"github.com/cosmos/cosmos-sdk/types/tx/signing"
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authsign "github.com/cosmos/cosmos-sdk/x/auth/signing"
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)
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// SimAppChainID hardcoded chainID for simulation
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const (
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DefaultGenTxGas = 1000000
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SimAppChainID = "simulation-app"
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)
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// GenTx generates a signed mock transaction.
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func GenTx(gen client.TxConfig, msgs []sdk.Msg, feeAmt sdk.Coins, gas uint64, chainID string, accNums, accSeqs []uint64, priv ...cryptotypes.PrivKey) (sdk.Tx, error) {
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sigs := make([]signing.SignatureV2, len(priv))
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// create a random length memo
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r := rand.New(rand.NewSource(time.Now().UnixNano()))
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memo := simulation.RandStringOfLength(r, simulation.RandIntBetween(r, 0, 100))
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signMode := gen.SignModeHandler().DefaultMode()
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// 1st round: set SignatureV2 with empty signatures, to set correct
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// signer infos.
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for i, p := range priv {
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sigs[i] = signing.SignatureV2{
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PubKey: p.PubKey(),
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Data: &signing.SingleSignatureData{
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SignMode: signMode,
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},
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Sequence: accSeqs[i],
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}
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}
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tx := gen.NewTxBuilder()
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err := tx.SetMsgs(msgs...)
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if err != nil {
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return nil, err
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}
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err = tx.SetSignatures(sigs...)
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if err != nil {
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return nil, err
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}
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tx.SetMemo(memo)
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tx.SetFeeAmount(feeAmt)
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tx.SetGasLimit(gas)
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// 2nd round: once all signer infos are set, every signer can sign.
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for i, p := range priv {
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signerData := authsign.SignerData{
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ChainID: chainID,
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AccountNumber: accNums[i],
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Sequence: accSeqs[i],
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}
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signBytes, err := gen.SignModeHandler().GetSignBytes(signMode, signerData, tx.GetTx())
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if err != nil {
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panic(err)
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}
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sig, err := p.Sign(signBytes)
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if err != nil {
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panic(err)
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}
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sigs[i].Data.(*signing.SingleSignatureData).Signature = sig
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err = tx.SetSignatures(sigs...)
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if err != nil {
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panic(err)
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}
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}
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return tx.GetTx(), nil
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}
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