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cmd/evm: implement input txs via rlp in t8n tool (#23138)

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In many cases, it's desireable to use already-signed transactions as input to the state transition, instead of having the evm sign them internally (for example to use malformed or not-yet-valid transactions). This PR adds support + docs for that feature.
This commit is contained in:
Martin Holst Swende
2021-08-07 23:04:34 +02:00
committed by GitHub
parent 0658712f65
commit 8a24b56331
8 changed files with 240 additions and 36 deletions
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37
cmd/evm/transition-test.sh
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@ -11,6 +11,8 @@ function showjson(){
function demo(){
echo "$ticks"
echo "$1"
$1
echo ""
echo "$ticks"
echo ""
}
@ -152,9 +154,7 @@ echo ""
echo "The \`BLOCKHASH\` opcode requires blockhashes to be provided by the caller, inside the \`env\`."
echo "If a required blockhash is not provided, the exit code should be \`4\`:"
echo "Example where blockhashes are provided: "
cmd="./evm t8n --input.alloc=./testdata/3/alloc.json --input.txs=./testdata/3/txs.json --input.env=./testdata/3/env.json --trace"
tick && echo $cmd && tick
$cmd 2>&1 >/dev/null
demo "./evm --verbosity=1 t8n --input.alloc=./testdata/3/alloc.json --input.txs=./testdata/3/txs.json --input.env=./testdata/3/env.json --trace"
cmd="cat trace-0-0x72fadbef39cd251a437eea619cfeda752271a5faaaa2147df012e112159ffb81.jsonl | grep BLOCKHASH -C2"
tick && echo $cmd && tick
echo "$ticks"
@ -164,13 +164,11 @@ echo ""
echo "In this example, the caller has not provided the required blockhash:"
cmd="./evm t8n --input.alloc=./testdata/4/alloc.json --input.txs=./testdata/4/txs.json --input.env=./testdata/4/env.json --trace"
tick && echo $cmd && tick
tick
$cmd
tick && echo $cmd && $cmd
errc=$?
tick
echo "Error code: $errc"
echo ""
echo "### Chaining"
echo ""
@ -189,3 +187,28 @@ echo ""
echo "In order to meaningfully chain invocations, one would need to provide meaningful new \`env\`, otherwise the"
echo "actual blocknumber (exposed to the EVM) would not increase."
echo ""
echo "### Transactions in RLP form"
echo ""
echo "It is possible to provide already-signed transactions as input to, using an \`input.txs\` which ends with the \`rlp\` suffix."
echo "The input format for RLP-form transactions is _identical_ to the _output_ format for block bodies. Therefore, it's fully possible"
echo "to use the evm to go from \`json\` input to \`rlp\` input."
echo ""
echo "The following command takes **json** the transactions in \`./testdata/13/txs.json\` and signs them. After execution, they are output to \`signed_txs.rlp\`.:"
demo "./evm t8n --state.fork=London --input.alloc=./testdata/13/alloc.json --input.txs=./testdata/13/txs.json --input.env=./testdata/13/env.json --output.result=alloc_jsontx.json --output.body=signed_txs.rlp"
echo "The \`output.body\` is the rlp-list of transactions, encoded in hex and placed in a string a'la \`json\` encoding rules:"
demo "cat signed_txs.rlp"
echo "We can use \`rlpdump\` to check what the contents are: "
echo "$ticks"
echo "rlpdump -hex \$(cat signed_txs.rlp | jq -r )"
rlpdump -hex $(cat signed_txs.rlp | jq -r )
echo "$ticks"
echo "Now, we can now use those (or any other already signed transactions), as input, like so: "
demo "./evm t8n --state.fork=London --input.alloc=./testdata/13/alloc.json --input.txs=./signed_txs.rlp --input.env=./testdata/13/env.json --output.result=alloc_rlptx.json"
echo "You might have noticed that the results from these two invocations were stored in two separate files. "
echo "And we can now finally check that they match."
echo "$ticks"
echo "cat alloc_jsontx.json | jq .stateRoot && cat alloc_rlptx.json | jq .stateRoot"
cat alloc_jsontx.json | jq .stateRoot && cat alloc_rlptx.json | jq .stateRoot
echo "$ticks"