2019-06-20 13:37:57 +00:00
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package app
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import (
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"fmt"
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"github.com/tendermint/tendermint/crypto/secp256k1"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/x/auth"
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"github.com/cosmos/cosmos-sdk/x/bank"
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2019-06-20 16:29:13 +00:00
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"github.com/kava-labs/kava/app"
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2019-06-20 13:37:57 +00:00
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)
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// This will fail half the time with the second output being 173
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// This is due to secp256k1 signatures not being constant size.
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// nolint: vet
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func ExampleTxSendSize() {
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cdc := app.MakeCodec()
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var gas uint64 = 1
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priv1 := secp256k1.GenPrivKeySecp256k1([]byte{0})
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addr1 := sdk.AccAddress(priv1.PubKey().Address())
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priv2 := secp256k1.GenPrivKeySecp256k1([]byte{1})
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addr2 := sdk.AccAddress(priv2.PubKey().Address())
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coins := sdk.Coins{sdk.NewCoin("denom", sdk.NewInt(10))}
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msg1 := bank.MsgMultiSend{
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Inputs: []bank.Input{bank.NewInput(addr1, coins)},
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Outputs: []bank.Output{bank.NewOutput(addr2, coins)},
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}
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fee := auth.NewStdFee(gas, coins)
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signBytes := auth.StdSignBytes("example-chain-ID",
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1, 1, fee, []sdk.Msg{msg1}, "")
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sig, _ := priv1.Sign(signBytes)
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sigs := []auth.StdSignature{{nil, sig}}
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tx := auth.NewStdTx([]sdk.Msg{msg1}, fee, sigs, "")
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fmt.Println(len(cdc.MustMarshalBinaryBare([]sdk.Msg{msg1})))
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fmt.Println(len(cdc.MustMarshalBinaryBare(tx)))
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// output: 80
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// 169
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}
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