feat(substreams): add substreams for Uniswap v2 and v3

substreams/crates/substreams-helper/Cargo.toml

@@ -0,0 +1,29 @@
+[package]
+name = "substreams-helper"
+description = "Substreams Helper Crate - by Messari"
+version = "0.0.2"
+edition = "2021"
+license = "MIT"
+homepage = "https://messari.io/"
+repository = "https://github.com/messari/substreams/substreams-helper"
+
+[dependencies]
+ethabi.workspace = true
+hex.workspace = true
+hex-literal.workspace = true
+prost.workspace = true
+prost-types.workspace = true
+num-bigint = "0.4"
+bigdecimal = "0.3"
+pad = "0.1"
+tiny-keccak = { version = "2.0", features = ["keccak"] }
+substreams = { workspace = true }
+substreams-ethereum = { workspace = true }
+thiserror = "1.0.37"
+downcast-rs = "1.2.0"
+substreams-entity-change = "1.1.0"
+base64 = "0.13.0"
+
+
+[build-dependencies]
+anyhow.workspace = true