ex_wire v0.1.1 ExWire.Packet.BlockHeaders

Eth Wire Packet for getting block headers from a peer.

**BlockHeaders** [`+0x04`, `blockHeader_0`, `blockHeader_1`, ...]

Reply to `GetBlockHeaders`. The items in the list (following the message ID) are
block headers in the format described in the main Ethereum specification, previously
asked for in a `GetBlockHeaders` message. This may validly contain no block headers
if no block headers were able to be returned for the `GetBlockHeaders` query.

Link to this section Summary

Types

t()

Functions

deserialize(rlp)

Given an RLP-encoded BlockBodies packet from Eth Wire Protocol, decodes into a BlockBodies struct

handle(packet)

Handles a BlockHeaders message. This is when we have received a given set of block headers back from a peer

serialize(packet)

Given a BlockHeaders packet, serializes for transport over Eth Wire Protocol

Link to this section Types

t()

t() :: %ExWire.Packet.BlockHeaders{headers: [Block.Header.t]}

Link to this section Functions

deserialize(rlp)

deserialize(ExRLP.t) :: t

Given an RLP-encoded BlockBodies packet from Eth Wire Protocol, decodes into a BlockBodies struct.

Examples

iex> ExWire.Packet.BlockHeaders.deserialize([ [<<1::256>>, <<2::256>>, <<3::160>>, <<4::256>>, <<5::256>>, <<6::256>>, <<>>, <<5>>, <<1>>, <<5>>, <<3>>, <<6>>, "Hi mom", <<7::256>>, <<8::64>>] ])
%ExWire.Packet.BlockHeaders{
  headers: [
    %Block.Header{parent_hash: <<1::256>>, ommers_hash: <<2::256>>, beneficiary: <<3::160>>, state_root: <<4::256>>, transactions_root: <<5::256>>, receipts_root: <<6::256>>, logs_bloom: <<>>, difficulty: 5, number: 1, gas_limit: 5, gas_used: 3, timestamp: 6, extra_data: "Hi mom", mix_hash: <<7::256>>, nonce: <<8::64>>},
  ]
}

handle(packet)

handle(ExWire.Packet.packet) :: ExWire.Packet.handle_response

Handles a BlockHeaders message. This is when we have received a given set of block headers back from a peer.

Examples

iex> %ExWire.Packet.BlockHeaders{headers: [ %Block.Header{parent_hash: <<1::256>>, ommers_hash: <<2::256>>, beneficiary: <<3::160>>, state_root: <<4::256>>, transactions_root: <<5::256>>, receipts_root: <<6::256>>, logs_bloom: <<>>, difficulty: 5, number: 1, gas_limit: 5, gas_used: 3, timestamp: 6, extra_data: "Hi mom", mix_hash: <<7::256>>, nonce: <<8::64>>} ]}
...> |> ExWire.Packet.BlockHeaders.handle()
:ok

serialize(packet)

serialize(t) :: ExRLP.t

Given a BlockHeaders packet, serializes for transport over Eth Wire Protocol.

Examples

iex> %ExWire.Packet.BlockHeaders{
...>   headers: [
...>     %Block.Header{parent_hash: <<1::256>>, ommers_hash: <<2::256>>, beneficiary: <<3::160>>, state_root: <<4::256>>, transactions_root: <<5::256>>, receipts_root: <<6::256>>, logs_bloom: <<>>, difficulty: 5, number: 1, gas_limit: 5, gas_used: 3, timestamp: 6, extra_data: "Hi mom", mix_hash: <<7::256>>, nonce: <<8::64>>}
...>   ]
...> }
...> |> ExWire.Packet.BlockHeaders.serialize
[ [<<1::256>>, <<2::256>>, <<3::160>>, <<4::256>>, <<5::256>>, <<6::256>>, <<>>, 5, 1, 5, 3, 6, "Hi mom", <<7::256>>, <<8::64>>] ]