Minimal pure RLP (Recursive Length Prefix) encoding.
Provides exactly the encoding surface X402.Transaction needs to build
EIP-1559 typed transactions: binaries, non-negative integers (encoded as
their minimal big-endian byte representation, so 0 encodes as the empty
string), and nested lists thereof. There is no decoder — the library never
needs to parse RLP, and settlement tests decode raw transactions with their
own reference decoder to prove the encoding.
Examples
iex> X402.RLP.encode("dog")
<<0x83, "dog">>
iex> X402.RLP.encode(["cat", "dog"])
<<0xC8, 0x83, "cat", 0x83, "dog">>
iex> X402.RLP.encode(0)
<<0x80>>
iex> X402.RLP.encode(1024)
<<0x82, 0x04, 0x00>>Summary
Functions
RLP-encodes a binary, a non-negative integer, or a (nested) list of items.
Types
@type item() :: binary() | non_neg_integer() | [item()]
An RLP-encodable item: a binary, a non-negative integer, or a list of items.
Functions
RLP-encodes a binary, a non-negative integer, or a (nested) list of items.
Integers are encoded as their minimal big-endian byte representation per
the Ethereum convention (0 becomes the empty byte string, so leading
zero bytes never appear).
Examples
iex> X402.RLP.encode("")
<<0x80>>
iex> X402.RLP.encode(<<0x7F>>)
<<0x7F>>
iex> X402.RLP.encode(15)
<<0x0F>>
iex> X402.RLP.encode([])
<<0xC0>>
iex> X402.RLP.encode([[], [[]], [[], [[]]]])
<<0xC7, 0xC0, 0xC1, 0xC0, 0xC3, 0xC0, 0xC1, 0xC0>>