A minimal Zappa attach policy with bucket access

zappa_minimal_attach_policy.json.template

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "iam:GetRole",
                "iam:PutRolePolicy"
            ],
            "Resource": [
                "*"
            ]
        },
        {
            "Effect": "Allow",
            "Action": [
                "iam:PassRole"
            ],
            "Resource": [
                "arn:aws:iam::${ACCOUNT_ID}:role/${EXECUTION_ROLE_NAME}"
            ]
        },
        {
            "Effect": "Allow",
            "Action": [
                "apigateway:DELETE",
                "apigateway:GET",
                "apigateway:PATCH",
                "apigateway:POST",
                "apigateway:PUT",
                "events:DeleteRule",
                "events:DescribeRule",
                "events:ListRules",
                "events:ListTargetsByRule",
                "events:PutTargets",
                "events:RemoveTargets",
                "lambda:AddPermission",
                "lambda:CreateFunction",
                "lambda:DeleteFunction",
                "lambda:GetFunction",
                "lambda:ListVersionsByFunction",
                "lambda:UpdateFunctionCode",
                "lambda:UpdateFunctionConfiguration",
                "cloudformation:CreateStack",
                "cloudformation:DeleteStack",
                "cloudformation:DescribeStackResource",
                "cloudformation:DescribeStacks",
                "cloudformation:ListStackResources",
                "cloudformation:UpdateStack",
                "logs:DescribeLogStreams",
                "logs:FilterLogEvents",
                "route53:ListHostedZones",
                "route53:ChangeResourceRecordSets",
                "route53:GetHostedZone"
            ],
            "Resource": [
                "*"
            ]
        },
        {
            "Effect": "Allow",
            "Action": [
                "s3:ListBucket"
            ],
            "Resource": [
                "arn:aws:s3:::${SOURCE_BUCKET_NAME}",
                "arn:aws:s3:::${INTERMEDIATE_BUCKET_NAME}"
            ]
        },
        {
            "Effect": "Allow",
            "Action": [
                "s3:DeleteObject",
                "s3:GetObject",
                "s3:PutObject",
                "s3:CreateMultipartUpload",
                "s3:AbortMultipartUpload",
                "s3:ListMultipartUploadParts",
                "s3:ListBucketMultipartUploads"
            ],
            "Resource": [
                "arn:aws:s3:::${SOURCE_BUCKET_NAME}/*",
                "arn:aws:s3:::${INTERMEDIATE_BUCKET_NAME}/*"
            ]
        }
    ]
}