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@ganache/rlp
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Recursive Length Prefix Encoding Module
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@ganache/rlp
Recursive Length Prefix Encoding for Node.js.
Based on https://github.com/ethereumjs/rlp, with some additional optimizations for encoding:
function encodeRange<
T extends EncodingInput | Readonly<EncodingInput>,
Start extends RangeOf<T["length"]>
>(
items: T,
start: Start,
length: Exclude<Remainders<T["length"], Start>, 0>
): { length: number; output: Buffer[] } {
//...;
}
Begin RLP encoding of items
, from start
until length
. Call RLP.digest
to
finish encoding.
Returns an object containing the total length
of all data in the encoded parts,
and output
, an array of encoded Buffers.
function digest(ranges: Readonly<Buffer[]>[], length: number) {
// ...
}
Finishes encoding started by encodeRange
.
Returns a Buffer of encoded data.
Additional changes:
encode
encode
only accepts buffers or nested buffer arrays, strings, number, bigint,
and BN support have been removed.These changes enable encoding data in chunks, avoiding processing the same inputs multiple times in common scenarios withing Ganache. Example:
type EthereumRawTx = [
nonce: Buffer,
gasPrice: Buffer,
gas: Buffer,
to: Buffer,
value: Buffer,
data: Buffer,
v: Buffer,
r: Buffer,
s: Buffer
];
// encode the first 6 entries
const partialRlp = encodeRange(raw, 0, 6);
// encode the last 3 entires
const signature = encodeRange(raw, 6, 3);
// combine all entries
const serialized = digest(
[partialRlp.output, signature.output],
partialRlp.length + signature.length
);
return {
// computing the `from` address requires entries 0-6
from: computeFromAddress(partialRlp, v.toNumber(), raw, chainId),
// hash requires entries 0-9
hash: Data.from(keccak(serialized), 32),
// serialized uses all entries for storage/transmission
serialized
};
FAQs
Recursive Length Prefix Encoding Module
The npm package @ganache/rlp receives a total of 16,335 weekly downloads. As such, @ganache/rlp popularity was classified as popular.
We found that @ganache/rlp demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 4 open source maintainers collaborating on the project.
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